./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gr2006.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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/loop-lit/gr2006.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 21:43:45,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 21:43:45,657 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 21:43:45,663 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 21:43:45,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 21:43:45,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 21:43:45,696 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 21:43:45,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 21:43:45,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 21:43:45,697 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 21:43:45,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 21:43:45,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 21:43:45,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 21:43:45,699 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 21:43:45,701 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 21:43:45,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 21:43:45,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 21:43:45,702 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 21:43:45,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 21:43:45,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 21:43:45,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 21:43:45,704 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 21:43:45,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 21:43:45,704 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 21:43:45,704 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 21:43:45,704 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 21:43:45,705 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 21:43:45,705 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 21:43:45,705 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 21:43:45,705 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 21:43:45,705 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 21:43:45,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 21:43:45,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:43:45,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 21:43:45,706 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 21:43:45,706 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 21:43:45,706 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 21:43:45,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 21:43:45,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 21:43:45,707 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 21:43:45,707 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 21:43:45,708 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 21:43:45,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 21:43:45,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 21:43:45,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 21:43:45,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 21:43:45,913 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 21:43:45,913 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 21:43:45,915 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-lit/gr2006.i [2024-09-12 21:43:47,095 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 21:43:47,249 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 21:43:47,250 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/gr2006.i [2024-09-12 21:43:47,256 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/11e2f168f/298aba4eb9634aba85fa45e3d3491b75/FLAG6fd605238 [2024-09-12 21:43:47,662 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/11e2f168f/298aba4eb9634aba85fa45e3d3491b75 [2024-09-12 21:43:47,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 21:43:47,665 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 21:43:47,666 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 21:43:47,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 21:43:47,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 21:43:47,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a52dae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47, skipping insertion in model container [2024-09-12 21:43:47,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 21:43:47,803 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2024-09-12 21:43:47,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:43:47,818 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 21:43:47,830 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2024-09-12 21:43:47,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:43:47,846 INFO L204 MainTranslator]: Completed translation [2024-09-12 21:43:47,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47 WrapperNode [2024-09-12 21:43:47,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 21:43:47,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 21:43:47,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 21:43:47,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 21:43:47,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,859 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,864 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 21:43:47,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 21:43:47,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 21:43:47,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 21:43:47,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 21:43:47,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,874 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,883 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 21:43:47,883 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,883 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,890 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,891 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 21:43:47,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 21:43:47,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 21:43:47,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 21:43:47,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (1/1) ... [2024-09-12 21:43:47,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:43:47,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:47,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 21:43:47,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 21:43:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 21:43:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 21:43:47,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 21:43:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 21:43:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 21:43:47,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 21:43:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 21:43:47,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 21:43:47,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 21:43:47,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 21:43:48,016 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 21:43:48,018 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 21:43:48,119 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 21:43:48,119 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 21:43:48,132 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 21:43:48,133 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 21:43:48,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:43:48 BoogieIcfgContainer [2024-09-12 21:43:48,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 21:43:48,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 21:43:48,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 21:43:48,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 21:43:48,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 09:43:47" (1/3) ... [2024-09-12 21:43:48,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c8a9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:43:48, skipping insertion in model container [2024-09-12 21:43:48,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:43:47" (2/3) ... [2024-09-12 21:43:48,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c8a9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:43:48, skipping insertion in model container [2024-09-12 21:43:48,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:43:48" (3/3) ... [2024-09-12 21:43:48,140 INFO L112 eAbstractionObserver]: Analyzing ICFG gr2006.i [2024-09-12 21:43:48,152 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 21:43:48,152 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 21:43:48,189 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 21:43:48,194 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;@3f07e198, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 21:43:48,194 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 21:43:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 21:43:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 21:43:48,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:48,206 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:48,207 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:48,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,212 INFO L85 PathProgramCache]: Analyzing trace with hash 798663313, now seen corresponding path program 1 times [2024-09-12 21:43:48,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:48,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622071407] [2024-09-12 21:43:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:48,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622071407] [2024-09-12 21:43:48,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622071407] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:43:48,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:43:48,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 21:43:48,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689123530] [2024-09-12 21:43:48,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:43:48,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 21:43:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 21:43:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 21:43:48,367 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:48,387 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-09-12 21:43:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 21:43:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 21:43:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:48,394 INFO L225 Difference]: With dead ends: 30 [2024-09-12 21:43:48,394 INFO L226 Difference]: Without dead ends: 13 [2024-09-12 21:43:48,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 21:43:48,399 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:48,402 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:43:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-12 21:43:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-12 21:43:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2024-09-12 21:43:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-09-12 21:43:48,429 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2024-09-12 21:43:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:48,430 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-09-12 21:43:48,430 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-09-12 21:43:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 21:43:48,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:48,432 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:48,432 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 21:43:48,432 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:48,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,434 INFO L85 PathProgramCache]: Analyzing trace with hash -803180566, now seen corresponding path program 1 times [2024-09-12 21:43:48,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:48,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397365603] [2024-09-12 21:43:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:48,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:48,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397365603] [2024-09-12 21:43:48,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397365603] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:43:48,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:43:48,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 21:43:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025234066] [2024-09-12 21:43:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:43:48,534 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 21:43:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:48,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 21:43:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 21:43:48,536 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:48,563 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-12 21:43:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 21:43:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-12 21:43:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:48,565 INFO L225 Difference]: With dead ends: 23 [2024-09-12 21:43:48,566 INFO L226 Difference]: Without dead ends: 18 [2024-09-12 21:43:48,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 21:43:48,567 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:48,567 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:43:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-12 21:43:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-09-12 21:43:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2024-09-12 21:43:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-12 21:43:48,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2024-09-12 21:43:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:48,575 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-12 21:43:48,576 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-12 21:43:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 21:43:48,576 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:48,577 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:48,577 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 21:43:48,577 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:48,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash -745922264, now seen corresponding path program 1 times [2024-09-12 21:43:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:48,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590274810] [2024-09-12 21:43:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:48,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:48,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:48,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590274810] [2024-09-12 21:43:48,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590274810] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:43:48,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:43:48,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 21:43:48,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340881224] [2024-09-12 21:43:48,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:43:48,633 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 21:43:48,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:48,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 21:43:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 21:43:48,634 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:48,655 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-12 21:43:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 21:43:48,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-12 21:43:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:48,656 INFO L225 Difference]: With dead ends: 27 [2024-09-12 21:43:48,656 INFO L226 Difference]: Without dead ends: 19 [2024-09-12 21:43:48,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 21:43:48,668 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:48,668 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:43:48,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-09-12 21:43:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-09-12 21:43:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-09-12 21:43:48,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2024-09-12 21:43:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:48,676 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-09-12 21:43:48,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-09-12 21:43:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 21:43:48,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:48,677 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:48,677 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 21:43:48,677 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:48,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash -704564148, now seen corresponding path program 1 times [2024-09-12 21:43:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:48,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368385682] [2024-09-12 21:43:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:48,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:48,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368385682] [2024-09-12 21:43:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368385682] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:43:48,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085493043] [2024-09-12 21:43:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:48,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:48,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:48,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:43:48,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 21:43:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:48,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-12 21:43:48,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:43:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:48,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:43:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085493043] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:43:48,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:43:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-12 21:43:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012269381] [2024-09-12 21:43:48,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:43:48,855 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 21:43:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 21:43:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 21:43:48,856 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:48,889 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-09-12 21:43:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 21:43:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-12 21:43:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:48,891 INFO L225 Difference]: With dead ends: 37 [2024-09-12 21:43:48,891 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 21:43:48,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 21:43:48,892 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:48,893 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:43:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 21:43:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-09-12 21:43:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2024-09-12 21:43:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-12 21:43:48,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2024-09-12 21:43:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:48,899 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-12 21:43:48,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:48,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-12 21:43:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 21:43:48,901 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:48,901 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:48,913 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 21:43:49,101 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 [2024-09-12 21:43:49,102 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:49,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash -369296344, now seen corresponding path program 2 times [2024-09-12 21:43:49,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:49,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840273257] [2024-09-12 21:43:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:49,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840273257] [2024-09-12 21:43:49,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840273257] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:43:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21638885] [2024-09-12 21:43:49,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 21:43:49,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:49,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:43:49,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 21:43:49,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 21:43:49,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:43:49,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 21:43:49,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:43:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:49,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:43:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:49,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21638885] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:43:49,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:43:49,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-12 21:43:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606106089] [2024-09-12 21:43:49,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:43:49,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 21:43:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 21:43:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-09-12 21:43:49,354 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:49,406 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-09-12 21:43:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 21:43:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-12 21:43:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:49,408 INFO L225 Difference]: With dead ends: 55 [2024-09-12 21:43:49,409 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 21:43:49,409 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-09-12 21:43:49,410 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:49,410 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:43:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 21:43:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-09-12 21:43:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 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) [2024-09-12 21:43:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-09-12 21:43:49,429 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 24 [2024-09-12 21:43:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:49,429 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-09-12 21:43:49,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:49,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-09-12 21:43:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 21:43:49,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:49,431 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:49,444 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 21:43:49,631 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 [2024-09-12 21:43:49,632 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:49,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2112727896, now seen corresponding path program 3 times [2024-09-12 21:43:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:49,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505919389] [2024-09-12 21:43:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:49,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:49,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:43:49,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:49,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505919389] [2024-09-12 21:43:49,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505919389] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:43:49,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479938913] [2024-09-12 21:43:49,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 21:43:49,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:49,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:49,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:43:49,838 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 21:43:49,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 21:43:49,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:43:49,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 21:43:49,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:43:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 21:43:49,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:43:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-12 21:43:49,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479938913] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:43:49,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:43:49,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 15 [2024-09-12 21:43:49,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008460517] [2024-09-12 21:43:49,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:43:49,941 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 21:43:49,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 21:43:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2024-09-12 21:43:49,942 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:50,077 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-09-12 21:43:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 21:43:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 21:43:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:50,078 INFO L225 Difference]: With dead ends: 61 [2024-09-12 21:43:50,078 INFO L226 Difference]: Without dead ends: 53 [2024-09-12 21:43:50,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2024-09-12 21:43:50,079 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:50,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:43:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-12 21:43:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-09-12 21:43:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-09-12 21:43:50,086 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2024-09-12 21:43:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:50,086 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-09-12 21:43:50,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:50,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-09-12 21:43:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 21:43:50,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:50,088 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:50,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 21:43:50,291 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 [2024-09-12 21:43:50,292 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:50,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash -690352086, now seen corresponding path program 4 times [2024-09-12 21:43:50,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:50,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281768221] [2024-09-12 21:43:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:50,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 46 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:43:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281768221] [2024-09-12 21:43:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281768221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:43:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887606566] [2024-09-12 21:43:50,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 21:43:50,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:50,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:50,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:43:50,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 21:43:50,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 21:43:50,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:43:50,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 21:43:50,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:43:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 46 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:43:50,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:43:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 46 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:43:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887606566] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:43:50,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:43:50,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-09-12 21:43:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232740190] [2024-09-12 21:43:50,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:43:50,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 21:43:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 21:43:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-09-12 21:43:50,814 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:50,890 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-12 21:43:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 21:43:50,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-12 21:43:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:50,893 INFO L225 Difference]: With dead ends: 100 [2024-09-12 21:43:50,893 INFO L226 Difference]: Without dead ends: 88 [2024-09-12 21:43:50,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-09-12 21:43:50,894 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:50,894 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:43:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-12 21:43:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-12 21:43:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 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) [2024-09-12 21:43:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2024-09-12 21:43:50,909 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 48 [2024-09-12 21:43:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:50,910 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2024-09-12 21:43:50,910 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:50,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2024-09-12 21:43:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-12 21:43:50,911 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:50,911 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:50,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 21:43:51,111 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 [2024-09-12 21:43:51,112 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:51,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2106249138, now seen corresponding path program 5 times [2024-09-12 21:43:51,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:51,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285465634] [2024-09-12 21:43:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:51,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:51,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 98 proven. 876 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:43:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:51,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285465634] [2024-09-12 21:43:51,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285465634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:43:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691504469] [2024-09-12 21:43:51,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 21:43:51,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:51,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:43:51,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 21:43:51,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-09-12 21:43:51,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:43:51,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 21:43:51,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:43:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 98 proven. 876 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:43:51,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:43:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 98 proven. 876 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:43:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691504469] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:43:52,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:43:52,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-09-12 21:43:52,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014340298] [2024-09-12 21:43:52,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:43:52,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-12 21:43:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-12 21:43:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 21:43:52,389 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:52,526 INFO L93 Difference]: Finished difference Result 178 states and 208 transitions. [2024-09-12 21:43:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-12 21:43:52,527 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2024-09-12 21:43:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:52,528 INFO L225 Difference]: With dead ends: 178 [2024-09-12 21:43:52,528 INFO L226 Difference]: Without dead ends: 166 [2024-09-12 21:43:52,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 21:43:52,529 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:52,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 125 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:43:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-12 21:43:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-09-12 21:43:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 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) [2024-09-12 21:43:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2024-09-12 21:43:52,557 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 87 [2024-09-12 21:43:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:52,558 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2024-09-12 21:43:52,558 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:52,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2024-09-12 21:43:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-09-12 21:43:52,559 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:52,559 INFO L216 NwaCegarLoop]: trace histogram [52, 51, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:52,573 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 21:43:52,764 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 [2024-09-12 21:43:52,765 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:52,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:52,765 INFO L85 PathProgramCache]: Analyzing trace with hash -751902514, now seen corresponding path program 6 times [2024-09-12 21:43:52,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:52,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107887100] [2024-09-12 21:43:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:52,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:52,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 585 proven. 6 refuted. 0 times theorem prover too weak. 3387 trivial. 0 not checked. [2024-09-12 21:43:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107887100] [2024-09-12 21:43:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107887100] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:43:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984128650] [2024-09-12 21:43:52,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 21:43:52,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:52,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:52,893 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:43:52,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 21:43:52,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-12 21:43:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:43:52,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 21:43:52,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:43:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 585 proven. 6 refuted. 0 times theorem prover too weak. 3387 trivial. 0 not checked. [2024-09-12 21:43:52,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:43:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 585 proven. 6 refuted. 0 times theorem prover too weak. 3387 trivial. 0 not checked. [2024-09-12 21:43:52,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984128650] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:43:52,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:43:52,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-12 21:43:52,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468968930] [2024-09-12 21:43:52,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:43:52,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 21:43:52,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:52,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 21:43:52,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-12 21:43:53,000 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:53,024 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2024-09-12 21:43:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 21:43:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2024-09-12 21:43:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:53,027 INFO L225 Difference]: With dead ends: 178 [2024-09-12 21:43:53,027 INFO L226 Difference]: Without dead ends: 173 [2024-09-12 21:43:53,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 331 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-12 21:43:53,031 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:53,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:43:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-12 21:43:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2024-09-12 21:43:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 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) [2024-09-12 21:43:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2024-09-12 21:43:53,046 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 165 [2024-09-12 21:43:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:53,047 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2024-09-12 21:43:53,047 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:53,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2024-09-12 21:43:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-09-12 21:43:53,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:53,049 INFO L216 NwaCegarLoop]: trace histogram [53, 52, 50, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:53,064 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 21:43:53,252 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:53,253 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:53,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:53,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2088474392, now seen corresponding path program 7 times [2024-09-12 21:43:53,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:53,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483623222] [2024-09-12 21:43:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:53,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:53,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:43:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 868 proven. 17 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2024-09-12 21:43:53,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:43:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483623222] [2024-09-12 21:43:53,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483623222] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:43:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636266718] [2024-09-12 21:43:53,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 21:43:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:43:53,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:43:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 21:43:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:43:53,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 21:43:53,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:43:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 4110 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 21:43:54,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:43:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 4110 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 21:43:55,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636266718] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:43:55,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:43:55,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 53, 53] total 100 [2024-09-12 21:43:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573867502] [2024-09-12 21:43:55,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:43:55,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-09-12 21:43:55,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:43:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-09-12 21:43:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2024-09-12 21:43:55,458 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 100 states, 100 states have (on average 3.11) internal successors, (311), 100 states have internal predecessors, (311), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:43:55,999 INFO L93 Difference]: Finished difference Result 654 states and 848 transitions. [2024-09-12 21:43:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-12 21:43:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.11) internal successors, (311), 100 states have internal predecessors, (311), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2024-09-12 21:43:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:43:56,002 INFO L225 Difference]: With dead ends: 654 [2024-09-12 21:43:56,002 INFO L226 Difference]: Without dead ends: 649 [2024-09-12 21:43:56,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 242 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4991 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2024-09-12 21:43:56,005 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 21:43:56,006 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 21:43:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-09-12 21:43:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 313. [2024-09-12 21:43:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.1688311688311688) internal successors, (360), 308 states have internal predecessors, (360), 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) [2024-09-12 21:43:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 364 transitions. [2024-09-12 21:43:56,039 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 364 transitions. Word has length 168 [2024-09-12 21:43:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:43:56,039 INFO L474 AbstractCegarLoop]: Abstraction has 313 states and 364 transitions. [2024-09-12 21:43:56,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.11) internal successors, (311), 100 states have internal predecessors, (311), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:43:56,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 364 transitions. [2024-09-12 21:43:56,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-09-12 21:43:56,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:43:56,047 INFO L216 NwaCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:43:56,060 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 21:43:56,247 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:43:56,248 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:43:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:43:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 532070120, now seen corresponding path program 8 times [2024-09-12 21:43:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:43:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027990689] [2024-09-12 21:43:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:43:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:43:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:00,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:00,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:00,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027990689] [2024-09-12 21:44:00,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027990689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:00,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935734664] [2024-09-12 21:44:00,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 21:44:00,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:00,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:00,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:44:00,429 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 21:44:00,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 21:44:00,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:44:00,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-09-12 21:44:00,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:01,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:44:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:02,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935734664] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:44:02,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:44:02,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 109 [2024-09-12 21:44:02,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563731711] [2024-09-12 21:44:02,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:44:02,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-09-12 21:44:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-09-12 21:44:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=10228, Unknown=0, NotChecked=0, Total=11772 [2024-09-12 21:44:02,196 INFO L87 Difference]: Start difference. First operand 313 states and 364 transitions. Second operand has 109 states, 109 states have (on average 2.8807339449541285) internal successors, (314), 107 states have internal predecessors, (314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:44:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:04,094 INFO L93 Difference]: Finished difference Result 4398 states and 5825 transitions. [2024-09-12 21:44:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-09-12 21:44:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.8807339449541285) internal successors, (314), 107 states have internal predecessors, (314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 312 [2024-09-12 21:44:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:04,106 INFO L225 Difference]: With dead ends: 4398 [2024-09-12 21:44:04,106 INFO L226 Difference]: Without dead ends: 4236 [2024-09-12 21:44:04,109 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 571 SyntacticMatches, 53 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4442 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1550, Invalid=10440, Unknown=0, NotChecked=0, Total=11990 [2024-09-12 21:44:04,110 INFO L434 NwaCegarLoop]: 157 mSDtfsCounter, 52 mSDsluCounter, 8636 mSDsCounter, 0 mSdLazyCounter, 6144 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8793 SdHoareTripleChecker+Invalid, 6197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 6144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:04,110 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 8793 Invalid, 6197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 6144 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-12 21:44:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2024-09-12 21:44:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 4187. [2024-09-12 21:44:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 4182 states have (on average 1.0241511238641798) internal successors, (4283), 4182 states have internal predecessors, (4283), 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) [2024-09-12 21:44:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 4287 transitions. [2024-09-12 21:44:04,510 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 4287 transitions. Word has length 312 [2024-09-12 21:44:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:04,510 INFO L474 AbstractCegarLoop]: Abstraction has 4187 states and 4287 transitions. [2024-09-12 21:44:04,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.8807339449541285) internal successors, (314), 107 states have internal predecessors, (314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:44:04,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 4287 transitions. [2024-09-12 21:44:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-09-12 21:44:04,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:04,513 INFO L216 NwaCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:04,528 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 21:44:04,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:04,714 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:04,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2056494222, now seen corresponding path program 9 times [2024-09-12 21:44:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:04,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378908682] [2024-09-12 21:44:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:04,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:06,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-09-12 21:44:06,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:06,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378908682] [2024-09-12 21:44:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378908682] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:06,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417005951] [2024-09-12 21:44:06,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 21:44:06,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:06,942 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:44:06,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 21:44:07,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2024-09-12 21:44:07,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:44:07,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-12 21:44:07,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-12 21:44:07,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:44:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-12 21:44:08,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417005951] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:44:08,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:44:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 55 [2024-09-12 21:44:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863658233] [2024-09-12 21:44:08,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:44:08,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-12 21:44:08,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-12 21:44:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 21:44:08,830 INFO L87 Difference]: Start difference. First operand 4187 states and 4287 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:44:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:09,380 INFO L93 Difference]: Finished difference Result 8374 states and 8575 transitions. [2024-09-12 21:44:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-12 21:44:09,380 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2024-09-12 21:44:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:09,397 INFO L225 Difference]: With dead ends: 8374 [2024-09-12 21:44:09,397 INFO L226 Difference]: Without dead ends: 4190 [2024-09-12 21:44:09,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 580 SyntacticMatches, 102 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2024-09-12 21:44:09,408 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:09,408 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 21:44:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4190 states. [2024-09-12 21:44:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4190 to 4190. [2024-09-12 21:44:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4190 states, 4185 states have (on average 1.0241338112305853) internal successors, (4286), 4185 states have internal predecessors, (4286), 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) [2024-09-12 21:44:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 4290 transitions. [2024-09-12 21:44:09,776 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 4290 transitions. Word has length 315 [2024-09-12 21:44:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:09,777 INFO L474 AbstractCegarLoop]: Abstraction has 4190 states and 4290 transitions. [2024-09-12 21:44:09,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:44:09,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 4290 transitions. [2024-09-12 21:44:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2024-09-12 21:44:09,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:09,779 INFO L216 NwaCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:09,791 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 21:44:09,979 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 21:44:09,979 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:09,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash 620457194, now seen corresponding path program 10 times [2024-09-12 21:44:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69226008] [2024-09-12 21:44:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:11,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11580 proven. 149 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2024-09-12 21:44:11,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:11,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69226008] [2024-09-12 21:44:11,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69226008] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:11,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866927019] [2024-09-12 21:44:11,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 21:44:11,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:11,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:11,225 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 21:44:11,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 21:44:11,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 21:44:11,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:44:11,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-12 21:44:11,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2024-09-12 21:44:11,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 21:44:11,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866927019] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:44:11,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 21:44:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [53] total 54 [2024-09-12 21:44:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700962917] [2024-09-12 21:44:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:44:11,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-12 21:44:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-12 21:44:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 21:44:11,436 INFO L87 Difference]: Start difference. First operand 4190 states and 4290 transitions. Second operand has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:44:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:11,640 INFO L93 Difference]: Finished difference Result 4190 states and 4290 transitions. [2024-09-12 21:44:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-12 21:44:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2024-09-12 21:44:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:11,646 INFO L225 Difference]: With dead ends: 4190 [2024-09-12 21:44:11,647 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 21:44:11,652 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 21:44:11,653 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:11,653 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 230 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:44:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 21:44:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 21:44:11,653 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) [2024-09-12 21:44:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 21:44:11,656 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 318 [2024-09-12 21:44:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:11,656 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 21:44:11,657 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:44:11,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 21:44:11,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 21:44:11,659 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 21:44:11,671 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 21:44:11,859 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 21:44:11,862 INFO L408 BasicCegarLoop]: Path program histogram: [10, 1, 1, 1] [2024-09-12 21:44:11,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 21:44:15,244 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 21:44:15,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 09:44:15 BoogieIcfgContainer [2024-09-12 21:44:15,278 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 21:44:15,279 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 21:44:15,279 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 21:44:15,279 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 21:44:15,279 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:43:48" (3/4) ... [2024-09-12 21:44:15,280 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 21:44:15,283 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 21:44:15,283 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 21:44:15,283 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-12 21:44:15,286 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-12 21:44:15,286 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-09-12 21:44:15,286 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-12 21:44:15,286 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 21:44:15,349 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 21:44:15,349 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 21:44:15,349 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 21:44:15,350 INFO L158 Benchmark]: Toolchain (without parser) took 27684.61ms. Allocated memory was 180.4MB in the beginning and 796.9MB in the end (delta: 616.6MB). Free memory was 125.4MB in the beginning and 336.8MB in the end (delta: -211.4MB). Peak memory consumption was 407.5MB. Max. memory is 16.1GB. [2024-09-12 21:44:15,350 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 147.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 21:44:15,350 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.84ms. Allocated memory is still 180.4MB. Free memory was 125.4MB in the beginning and 114.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-12 21:44:15,350 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.86ms. Allocated memory is still 180.4MB. Free memory was 114.1MB in the beginning and 113.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 21:44:15,351 INFO L158 Benchmark]: Boogie Preprocessor took 30.25ms. Allocated memory is still 180.4MB. Free memory was 113.1MB in the beginning and 111.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-12 21:44:15,351 INFO L158 Benchmark]: RCFGBuilder took 237.06ms. Allocated memory is still 180.4MB. Free memory was 111.3MB in the beginning and 99.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-12 21:44:15,351 INFO L158 Benchmark]: TraceAbstraction took 27143.50ms. Allocated memory was 180.4MB in the beginning and 796.9MB in the end (delta: 616.6MB). Free memory was 99.1MB in the beginning and 340.9MB in the end (delta: -241.9MB). Peak memory consumption was 443.4MB. Max. memory is 16.1GB. [2024-09-12 21:44:15,352 INFO L158 Benchmark]: Witness Printer took 70.82ms. Allocated memory is still 796.9MB. Free memory was 340.9MB in the beginning and 336.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-12 21:44:15,353 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 147.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.84ms. Allocated memory is still 180.4MB. Free memory was 125.4MB in the beginning and 114.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.86ms. Allocated memory is still 180.4MB. Free memory was 114.1MB in the beginning and 113.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.25ms. Allocated memory is still 180.4MB. Free memory was 113.1MB in the beginning and 111.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 237.06ms. Allocated memory is still 180.4MB. Free memory was 111.3MB in the beginning and 99.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 27143.50ms. Allocated memory was 180.4MB in the beginning and 796.9MB in the end (delta: 616.6MB). Free memory was 99.1MB in the beginning and 340.9MB in the end (delta: -241.9MB). Peak memory consumption was 443.4MB. Max. memory is 16.1GB. * Witness Printer took 70.82ms. Allocated memory is still 796.9MB. Free memory was 340.9MB in the beginning and 336.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 19]: 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, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.7s, OverallIterations: 13, TraceHistogramMax: 103, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 66 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 66 mSDsluCounter, 9878 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9486 mSDsCounter, 199 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7855 IncrementalHoareTripleChecker+Invalid, 8054 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 199 mSolverCounterUnsat, 392 mSDtfsCounter, 7855 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3053 GetRequests, 2452 SyntacticMatches, 167 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13139 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4190occurred in iteration=12, InterpolantAutomatonStates: 394, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 13 MinimizatonAttempts, 400 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 3022 NumberOfCodeBlocks, 2875 NumberOfCodeBlocksAsserted, 165 NumberOfCheckSat, 4166 ConstructedInterpolants, 0 QuantifiedInterpolants, 10326 SizeOfPredicates, 1 NumberOfNonLiveVariables, 3283 ConjunctsInSsa, 423 ConjunctsInUnsatCore, 32 InterpolantComputations, 4 PerfectInterpolantSequences, 80581/151884 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: 28]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y == 14) && (x == 14)) || ((x == 89) && (y == 11))) || ((x == 37) && (y == 37))) || ((y == 9) && (91 == x))) || ((y == 16) && (84 == x))) || ((x == 78) && (y == 22))) || ((57 == x) && (y == 43))) || ((x == 0) && (y == 0))) || ((y == 27) && (x == 73))) || ((y == 34) && (x == 34))) || ((x == 24) && (y == 24))) || ((y == 36) && (64 == x))) || ((y == 10) && (x == 10))) || ((7 == y) && (7 == x))) || ((x == 60) && (40 == y))) || ((y == 31) && (x == 69))) || ((x == 45) && (y == 45))) || ((y == 25) && (x == 75))) || ((y == 25) && (x == 25))) || ((x == 82) && (y == 18))) || ((x == 52) && (y == 48))) || ((42 == y) && (42 == x))) || ((32 == y) && (68 == x))) || ((y == 0) && (x == 100))) || ((44 == x) && (44 == y))) || ((29 == y) && (x == 71))) || ((y == 48) && (x == 48))) || ((y == 1) && (x == 1))) || ((y == 16) && (x == 16))) || ((y == 22) && (x == 22))) || ((x == 83) && (y == 17))) || ((y == 2) && (98 == x))) || ((x == 33) && (y == 33))) || ((49 == y) && (51 == x))) || ((x == 58) && (42 == y))) || ((87 == x) && (y == 13))) || ((x == 65) && (35 == y))) || ((y == 43) && (x == 43))) || ((77 == x) && (23 == y))) || ((29 == x) && (29 == y))) || ((y == 8) && (x == 8))) || ((y == 10) && (x == 90))) || ((x == 50) && (y == 50))) || ((x == 74) && (y == 26))) || ((x == 26) && (y == 26))) || ((y == 38) && (x == 38))) || ((66 == x) && (y == 34))) || ((19 == x) && (19 == y))) || ((95 == x) && (5 == y))) || ((y == 46) && (x == 54))) || ((y == 9) && (x == 9))) || ((x == 96) && (y == 4))) || ((32 == y) && (32 == x))) || ((y == 33) && (67 == x))) || ((7 == y) && (x == 93))) || ((x == 80) && (y == 20))) || ((y == 12) && (88 == x))) || ((x == 20) && (y == 20))) || ((30 == y) && (30 == x))) || ((y == 47) && (53 == x))) || ((y == 24) && (76 == x))) || ((x == 18) && (y == 18))) || ((x == 28) && (y == 28))) || ((x == 39) && (y == 39))) || ((y == 46) && (x == 46))) || ((x == 15) && (y == 15))) || ((81 == x) && (19 == y))) || ((41 == x) && (41 == y))) || ((23 == y) && (23 == x))) || ((x == 17) && (y == 17))) || ((97 == x) && (y == 3))) || ((x == 99) && (y == 1))) || ((y == 12) && (x == 12))) || ((y == 6) && (94 == x))) || ((y == 14) && (x == 86))) || ((y == 15) && (x == 85))) || ((x == 47) && (y == 47))) || ((x == 13) && (y == 13))) || ((35 == x) && (35 == y))) || ((56 == x) && (44 == y))) || ((y == 2) && (x == 2))) || ((x == 3) && (y == 3))) || ((y == 4) && (x == 4))) || ((y == 31) && (x == 31))) || ((y == 45) && (x == 55))) || ((y == 27) && (x == 27))) || ((y == 6) && (x == 6))) || ((y == 8) && (92 == x))) || ((59 == x) && (41 == y))) || ((72 == x) && (y == 28))) || ((y == 11) && (x == 11))) || ((40 == x) && (40 == y))) || ((y == 38) && (x == 62))) || ((5 == y) && (5 == x))) || ((30 == y) && (x == 70))) || ((y == 36) && (x == 36))) || ((49 == y) && (49 == x))) || ((x == 61) && (y == 39))) || ((x == 63) && (y == 37))) || ((x == 79) && (y == 21))) || ((y == 21) && (x == 21))) - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-12 21:44:15,376 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