./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:35:53,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:35:53,863 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:35:53,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:35:53,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:35:53,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:35:53,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:35:53,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:35:53,899 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:35:53,900 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:35:53,901 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:35:53,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:35:53,901 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:35:53,902 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:35:53,902 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:35:53,903 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:35:53,903 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:35:53,903 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:35:53,904 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:35:53,904 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:35:53,906 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:35:53,907 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:35:53,907 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:35:53,907 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:35:53,907 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:35:53,907 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:35:53,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:35:53,908 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:35:53,908 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:35:53,908 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:35:53,908 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:35:53,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:35:53,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:35:53,909 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:35:53,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:35:53,909 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:35:53,910 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:35:53,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:35:53,910 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:35:53,910 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:35:53,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:35:53,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:35:53,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:35:54,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:35:54,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:35:54,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:35:54,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:35:54,159 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:35:54,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2024-09-18 16:35:55,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:35:55,551 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:35:55,551 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2024-09-18 16:35:55,556 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1e9573726/64bc72e2a1f3442f8a2d004267ec648b/FLAGae284964f [2024-09-18 16:35:55,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1e9573726/64bc72e2a1f3442f8a2d004267ec648b [2024-09-18 16:35:55,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:35:55,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:35:55,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:35:55,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:35:55,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:35:55,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74bf06ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55, skipping insertion in model container [2024-09-18 16:35:55,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,593 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:35:55,716 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/sqrt1-ll_unwindbound100.c[520,533] [2024-09-18 16:35:55,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:35:55,737 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:35:55,746 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/sqrt1-ll_unwindbound100.c[520,533] [2024-09-18 16:35:55,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:35:55,763 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:35:55,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55 WrapperNode [2024-09-18 16:35:55,763 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:35:55,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:35:55,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:35:55,765 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:35:55,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,774 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,779 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:35:55,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:35:55,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:35:55,780 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:35:55,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:35:55,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,789 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,798 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-18 16:35:55,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,805 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:35:55,805 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:35:55,805 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:35:55,805 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:35:55,806 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (1/1) ... [2024-09-18 16:35:55,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:35:55,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:35:55,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 16:35:55,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 16:35:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:35:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:35:55,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:35:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:35:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:35:55,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:35:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:35:55,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:35:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:35:55,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:35:55,961 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:35:55,963 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:35:56,057 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 16:35:56,058 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:35:56,071 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:35:56,071 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:35:56,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:35:56 BoogieIcfgContainer [2024-09-18 16:35:56,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:35:56,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:35:56,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:35:56,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:35:56,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:35:55" (1/3) ... [2024-09-18 16:35:56,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593ee368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:35:56, skipping insertion in model container [2024-09-18 16:35:56,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:35:55" (2/3) ... [2024-09-18 16:35:56,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593ee368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:35:56, skipping insertion in model container [2024-09-18 16:35:56,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:35:56" (3/3) ... [2024-09-18 16:35:56,078 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound100.c [2024-09-18 16:35:56,116 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:35:56,116 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:35:56,177 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:35:56,182 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;@74e33bc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:35:56,183 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:35:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-18 16:35:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 16:35:56,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:56,193 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:56,193 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:56,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:56,198 INFO L85 PathProgramCache]: Analyzing trace with hash -97680429, now seen corresponding path program 1 times [2024-09-18 16:35:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:56,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73937496] [2024-09-18 16:35:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:56,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:35:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:35:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73937496] [2024-09-18 16:35:56,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73937496] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:35:56,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:35:56,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 16:35:56,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762891991] [2024-09-18 16:35:56,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:35:56,331 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 16:35:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:56,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 16:35:56,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:35:56,350 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:35:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:56,407 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-09-18 16:35:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 16:35:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-18 16:35:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:56,420 INFO L225 Difference]: With dead ends: 44 [2024-09-18 16:35:56,420 INFO L226 Difference]: Without dead ends: 21 [2024-09-18 16:35:56,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:35:56,426 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:56,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:35:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-18 16:35:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-18 16:35:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:35:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-09-18 16:35:56,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2024-09-18 16:35:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:56,465 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-09-18 16:35:56,466 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:35:56,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-09-18 16:35:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 16:35:56,467 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:56,467 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:56,467 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:35:56,468 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:56,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash 801118595, now seen corresponding path program 1 times [2024-09-18 16:35:56,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:56,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000402177] [2024-09-18 16:35:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:56,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:35:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:35:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000402177] [2024-09-18 16:35:56,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000402177] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:35:56,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:35:56,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 16:35:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082483293] [2024-09-18 16:35:56,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:35:56,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:35:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:35:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:35:56,635 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:35:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:56,723 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-09-18 16:35:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:35:56,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-18 16:35:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:56,724 INFO L225 Difference]: With dead ends: 31 [2024-09-18 16:35:56,724 INFO L226 Difference]: Without dead ends: 22 [2024-09-18 16:35:56,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:35:56,726 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:56,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:35:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-18 16:35:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-18 16:35:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:35:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-09-18 16:35:56,738 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2024-09-18 16:35:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:56,738 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-09-18 16:35:56,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:35:56,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-09-18 16:35:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 16:35:56,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:56,740 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:56,740 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:35:56,741 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:56,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 802786891, now seen corresponding path program 1 times [2024-09-18 16:35:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841988663] [2024-09-18 16:35:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:56,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:35:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:35:56,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:56,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841988663] [2024-09-18 16:35:56,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841988663] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:35:56,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:35:56,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 16:35:56,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296865283] [2024-09-18 16:35:56,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:35:56,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:35:56,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:35:56,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:35:56,849 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:35:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:56,972 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-09-18 16:35:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:35:56,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-18 16:35:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:56,973 INFO L225 Difference]: With dead ends: 35 [2024-09-18 16:35:56,973 INFO L226 Difference]: Without dead ends: 33 [2024-09-18 16:35:56,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:35:56,975 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:56,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:35:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-18 16:35:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-18 16:35:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-18 16:35:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-18 16:35:56,992 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2024-09-18 16:35:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:56,992 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-18 16:35:56,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 16:35:56,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-18 16:35:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 16:35:56,993 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:56,993 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:56,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 16:35:56,993 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:56,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1280493866, now seen corresponding path program 1 times [2024-09-18 16:35:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:56,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419889498] [2024-09-18 16:35:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:56,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:35:57,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407965162] [2024-09-18 16:35:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:35:57,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:35:57,012 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:35:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:35:57,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:35:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:35:57,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:35:57,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:57,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419889498] [2024-09-18 16:35:57,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:35:57,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407965162] [2024-09-18 16:35:57,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407965162] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:35:57,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:35:57,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:35:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656142267] [2024-09-18 16:35:57,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:35:57,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:35:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:35:57,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:35:57,139 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:35:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:57,191 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-09-18 16:35:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:35:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-09-18 16:35:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:57,193 INFO L225 Difference]: With dead ends: 39 [2024-09-18 16:35:57,195 INFO L226 Difference]: Without dead ends: 37 [2024-09-18 16:35:57,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:35:57,196 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:57,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:35:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-18 16:35:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-18 16:35:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-18 16:35:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-09-18 16:35:57,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 16 [2024-09-18 16:35:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:57,211 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-09-18 16:35:57,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:35:57,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-09-18 16:35:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 16:35:57,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:57,212 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:57,237 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 16:35:57,413 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:57,414 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:57,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:57,414 INFO L85 PathProgramCache]: Analyzing trace with hash 925975787, now seen corresponding path program 1 times [2024-09-18 16:35:57,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:57,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107512020] [2024-09-18 16:35:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:57,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:35:57,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350057904] [2024-09-18 16:35:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:57,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:57,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:35:57,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:35:57,443 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:35:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:35:57,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:35:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:35:57,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:35:57,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:57,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107512020] [2024-09-18 16:35:57,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:35:57,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350057904] [2024-09-18 16:35:57,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350057904] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:35:57,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:35:57,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:35:57,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916789718] [2024-09-18 16:35:57,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:35:57,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:35:57,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:35:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:35:57,538 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 16:35:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:57,577 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-09-18 16:35:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:35:57,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-18 16:35:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:57,579 INFO L225 Difference]: With dead ends: 43 [2024-09-18 16:35:57,579 INFO L226 Difference]: Without dead ends: 38 [2024-09-18 16:35:57,579 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:35:57,580 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:57,580 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:35:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-18 16:35:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-18 16:35:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:35:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-18 16:35:57,587 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2024-09-18 16:35:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:57,588 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-18 16:35:57,588 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 16:35:57,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-18 16:35:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 16:35:57,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:57,589 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:57,601 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:35:57,789 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:57,790 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:57,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1435580062, now seen corresponding path program 1 times [2024-09-18 16:35:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:57,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183049964] [2024-09-18 16:35:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:57,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:35:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-18 16:35:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 16:35:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 16:35:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:35:57,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183049964] [2024-09-18 16:35:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183049964] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:35:57,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657748225] [2024-09-18 16:35:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:57,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:35:57,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:35:57,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:35:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:57,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:35:57,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:35:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:35:58,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:35:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:35:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657748225] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:35:58,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:35:58,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-18 16:35:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304271512] [2024-09-18 16:35:58,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:35:58,075 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 16:35:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 16:35:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:35:58,076 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-18 16:35:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:58,260 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2024-09-18 16:35:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:35:58,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 29 [2024-09-18 16:35:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:58,262 INFO L225 Difference]: With dead ends: 79 [2024-09-18 16:35:58,262 INFO L226 Difference]: Without dead ends: 70 [2024-09-18 16:35:58,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:35:58,263 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:58,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:35:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-18 16:35:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-09-18 16:35:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-18 16:35:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2024-09-18 16:35:58,274 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 29 [2024-09-18 16:35:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:58,274 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2024-09-18 16:35:58,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-18 16:35:58,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2024-09-18 16:35:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 16:35:58,275 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:58,275 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:58,289 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:35:58,475 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 16:35:58,476 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:58,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:58,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1437248358, now seen corresponding path program 1 times [2024-09-18 16:35:58,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:58,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803487619] [2024-09-18 16:35:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:58,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:35:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:58,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-18 16:35:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:58,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-18 16:35:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:58,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-18 16:35:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:35:58,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:58,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803487619] [2024-09-18 16:35:58,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803487619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:35:58,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130494497] [2024-09-18 16:35:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:58,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:58,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:35:58,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:35:58,581 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:35:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:35:58,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 16:35:58,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:35:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:35:58,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:35:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:35:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130494497] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 16:35:58,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:35:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 10 [2024-09-18 16:35:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093705615] [2024-09-18 16:35:58,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:35:58,722 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:35:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:35:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:35:58,723 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:35:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:58,793 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-09-18 16:35:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:35:58,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 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 29 [2024-09-18 16:35:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:58,795 INFO L225 Difference]: With dead ends: 80 [2024-09-18 16:35:58,795 INFO L226 Difference]: Without dead ends: 78 [2024-09-18 16:35:58,795 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:35:58,796 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:58,796 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:35:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-18 16:35:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-18 16:35:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-18 16:35:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2024-09-18 16:35:58,810 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 29 [2024-09-18 16:35:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:58,810 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2024-09-18 16:35:58,811 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:35:58,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2024-09-18 16:35:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 16:35:58,811 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:35:58,811 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:58,823 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 16:35:59,015 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:59,016 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:35:59,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash 857281179, now seen corresponding path program 2 times [2024-09-18 16:35:59,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:35:59,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386335097] [2024-09-18 16:35:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:35:59,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:35:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:35:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264295146] [2024-09-18 16:35:59,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:35:59,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:35:59,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:35:59,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:35:59,029 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:35:59,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:35:59,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:35:59,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 16:35:59,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:35:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:35:59,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:35:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:35:59,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:35:59,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386335097] [2024-09-18 16:35:59,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:35:59,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264295146] [2024-09-18 16:35:59,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264295146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:35:59,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:35:59,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-18 16:35:59,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348917124] [2024-09-18 16:35:59,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:35:59,312 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 16:35:59,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:35:59,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 16:35:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-18 16:35:59,312 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-18 16:35:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:35:59,459 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-09-18 16:35:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:35:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 34 [2024-09-18 16:35:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:35:59,460 INFO L225 Difference]: With dead ends: 78 [2024-09-18 16:35:59,460 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 16:35:59,461 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-18 16:35:59,461 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:35:59,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:35:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 16:35:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 16:35:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-18 16:35:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 16:35:59,462 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2024-09-18 16:35:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:35:59,462 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 16:35:59,462 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-18 16:35:59,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:35:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 16:35:59,463 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 16:35:59,465 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 16:35:59,479 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 16:35:59,669 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-18 16:35:59,672 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-09-18 16:35:59,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 16:36:00,171 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 16:36:00,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 04:36:00 BoogieIcfgContainer [2024-09-18 16:36:00,186 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 16:36:00,186 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 16:36:00,186 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 16:36:00,187 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 16:36:00,187 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:35:56" (3/4) ... [2024-09-18 16:36:00,188 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 16:36:00,229 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 16:36:00,230 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 16:36:00,230 INFO L158 Benchmark]: Toolchain (without parser) took 4660.76ms. Allocated memory was 186.6MB in the beginning and 266.3MB in the end (delta: 79.7MB). Free memory was 115.0MB in the beginning and 133.4MB in the end (delta: -18.4MB). Peak memory consumption was 63.1MB. Max. memory is 16.1GB. [2024-09-18 16:36:00,230 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 186.6MB. Free memory is still 144.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:36:00,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.96ms. Allocated memory is still 186.6MB. Free memory was 114.8MB in the beginning and 103.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-18 16:36:00,231 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.63ms. Allocated memory is still 186.6MB. Free memory was 103.3MB in the beginning and 102.4MB in the end (delta: 850.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:36:00,231 INFO L158 Benchmark]: Boogie Preprocessor took 24.36ms. Allocated memory is still 186.6MB. Free memory was 102.2MB in the beginning and 100.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:36:00,231 INFO L158 Benchmark]: RCFGBuilder took 266.49ms. Allocated memory is still 186.6MB. Free memory was 100.6MB in the beginning and 88.3MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-18 16:36:00,232 INFO L158 Benchmark]: TraceAbstraction took 4112.69ms. Allocated memory was 186.6MB in the beginning and 266.3MB in the end (delta: 79.7MB). Free memory was 87.5MB in the beginning and 135.5MB in the end (delta: -48.0MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. [2024-09-18 16:36:00,232 INFO L158 Benchmark]: Witness Printer took 43.59ms. Allocated memory is still 266.3MB. Free memory was 135.5MB in the beginning and 133.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:36:00,233 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 186.6MB. Free memory is still 144.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.96ms. Allocated memory is still 186.6MB. Free memory was 114.8MB in the beginning and 103.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.63ms. Allocated memory is still 186.6MB. Free memory was 103.3MB in the beginning and 102.4MB in the end (delta: 850.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.36ms. Allocated memory is still 186.6MB. Free memory was 102.2MB in the beginning and 100.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 266.49ms. Allocated memory is still 186.6MB. Free memory was 100.6MB in the beginning and 88.3MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4112.69ms. Allocated memory was 186.6MB in the beginning and 266.3MB in the end (delta: 79.7MB). Free memory was 87.5MB in the beginning and 135.5MB in the end (delta: -48.0MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. * Witness Printer took 43.59ms. Allocated memory is still 266.3MB. Free memory was 135.5MB in the beginning and 133.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.5s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 554 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 397 mSDsCounter, 99 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 449 IncrementalHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 99 mSolverCounterUnsat, 157 mSDtfsCounter, 449 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 290 NumberOfCodeBlocks, 290 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 912 SizeOfPredicates, 7 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 168/205 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((((__int128) a * 2) + ((__int128) a * a)) + 1) == s) && (\old(counter) == 0)) && (t == (((__int128) a * 2) + 1))) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-18 16:36:00,251 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE