/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:23:58,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:23:58,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:23:58,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:23:58,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:23:58,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:23:58,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:23:58,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:23:58,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:23:58,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:23:58,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:23:58,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:23:58,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:23:58,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:23:58,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:23:58,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:23:58,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 01:23:58,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:23:58,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:23:58,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:23:58,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:23:58,821 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:23:58,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:23:58,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:23:58,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:23:58,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:23:58,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:23:58,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:23:58,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:23:58,822 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:23:58,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:23:58,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:23:58,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:23:58,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:23:58,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:23:58,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:23:58,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:23:58,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:23:58,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:23:58,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:23:58,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:23:58,826 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:23:58,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:23:58,827 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:23:58,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:23:58,827 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:23:58,827 INFO L138 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:23:59,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:23:59,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:23:59,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:23:59,045 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:23:59,046 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:23:59,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-2.c [2023-04-02 01:24:00,104 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:24:00,286 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:24:00,287 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2023-04-02 01:24:00,290 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f657a35c/4d9fd0773f2b4678b3d1c5e9d69c68cb/FLAG740b327e1 [2023-04-02 01:24:00,715 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f657a35c/4d9fd0773f2b4678b3d1c5e9d69c68cb [2023-04-02 01:24:00,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:24:00,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:24:00,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:24:00,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:24:00,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:24:00,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40d13fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00, skipping insertion in model container [2023-04-02 01:24:00,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:24:00,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:24:00,837 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2023-04-02 01:24:00,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:24:00,855 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:24:00,863 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2023-04-02 01:24:00,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:24:00,875 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:24:00,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00 WrapperNode [2023-04-02 01:24:00,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:24:00,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:24:00,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:24:00,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:24:00,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,891 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:24:00,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:24:00,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:24:00,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:24:00,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (1/1) ... [2023-04-02 01:24:00,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:24:00,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:00,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:24:00,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:24:00,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:24:00,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:24:00,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:24:00,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:24:00,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:24:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:24:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:24:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:24:00,992 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:24:00,993 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:24:01,123 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:24:01,127 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:24:01,127 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 01:24:01,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:24:01 BoogieIcfgContainer [2023-04-02 01:24:01,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:24:01,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:24:01,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:24:01,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:24:01,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:24:00" (1/3) ... [2023-04-02 01:24:01,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b38634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:24:01, skipping insertion in model container [2023-04-02 01:24:01,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:00" (2/3) ... [2023-04-02 01:24:01,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b38634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:24:01, skipping insertion in model container [2023-04-02 01:24:01,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:24:01" (3/3) ... [2023-04-02 01:24:01,133 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2023-04-02 01:24:01,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:24:01,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:24:01,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:24:01,252 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1c5ba5f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:24:01,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:24:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2023-04-02 01:24:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 01:24:01,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:01,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:01,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:01,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 1 times [2023-04-02 01:24:01,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:01,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127096124] [2023-04-02 01:24:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:01,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:01,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:01,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127096124] [2023-04-02 01:24:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127096124] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:24:01,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:24:01,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:24:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064437926] [2023-04-02 01:24:01,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:24:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:24:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:24:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:24:01,588 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:01,669 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2023-04-02 01:24:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:24:01,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 01:24:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:01,676 INFO L225 Difference]: With dead ends: 37 [2023-04-02 01:24:01,677 INFO L226 Difference]: Without dead ends: 17 [2023-04-02 01:24:01,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:24:01,681 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:01,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:24:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-02 01:24:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-04-02 01:24:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-04-02 01:24:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-04-02 01:24:01,717 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2023-04-02 01:24:01,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:01,718 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-04-02 01:24:01,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-04-02 01:24:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 01:24:01,718 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:01,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:01,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:24:01,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:01,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2037585725, now seen corresponding path program 1 times [2023-04-02 01:24:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:01,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897473588] [2023-04-02 01:24:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:01,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:01,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897473588] [2023-04-02 01:24:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897473588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:24:01,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:24:01,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:24:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215292741] [2023-04-02 01:24:01,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:24:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:24:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:24:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:24:01,829 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:01,868 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-04-02 01:24:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:24:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 01:24:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:01,871 INFO L225 Difference]: With dead ends: 24 [2023-04-02 01:24:01,871 INFO L226 Difference]: Without dead ends: 16 [2023-04-02 01:24:01,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:24:01,877 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:01,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:24:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-02 01:24:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-02 01:24:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2023-04-02 01:24:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-02 01:24:01,889 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2023-04-02 01:24:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:01,889 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-02 01:24:01,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-02 01:24:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:24:01,890 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:01,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:01,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:24:01,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:01,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:01,891 INFO L85 PathProgramCache]: Analyzing trace with hash -183414982, now seen corresponding path program 1 times [2023-04-02 01:24:01,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:01,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004200905] [2023-04-02 01:24:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:01,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:01,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:01,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:01,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004200905] [2023-04-02 01:24:01,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004200905] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:01,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404676237] [2023-04-02 01:24:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:01,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:01,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:01,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:02,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:24:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:02,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:24:02,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:02,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:02,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404676237] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:02,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:02,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-02 01:24:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418184935] [2023-04-02 01:24:02,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:24:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:24:02,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:24:02,079 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2023-04-02 01:24:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:02,137 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-04-02 01:24:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:24:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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 15 [2023-04-02 01:24:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:02,138 INFO L225 Difference]: With dead ends: 28 [2023-04-02 01:24:02,138 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 01:24:02,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:24:02,139 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:02,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:24:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 01:24:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 01:24:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2023-04-02 01:24:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-02 01:24:02,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2023-04-02 01:24:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:02,144 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-02 01:24:02,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2023-04-02 01:24:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-02 01:24:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 01:24:02,145 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:02,145 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:02,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:24:02,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:02,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:02,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash 934170243, now seen corresponding path program 2 times [2023-04-02 01:24:02,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:02,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552888035] [2023-04-02 01:24:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:02,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:02,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:02,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552888035] [2023-04-02 01:24:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552888035] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464409208] [2023-04-02 01:24:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:24:02,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:02,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:02,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:24:02,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:24:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:02,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 01:24:02,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:24:02,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 01:24:02,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464409208] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:02,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:02,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2023-04-02 01:24:02,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855202428] [2023-04-02 01:24:02,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:02,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:24:02,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:24:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:24:02,755 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 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) [2023-04-02 01:24:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:03,249 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-04-02 01:24:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 01:24:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 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 18 [2023-04-02 01:24:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:03,250 INFO L225 Difference]: With dead ends: 56 [2023-04-02 01:24:03,250 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 01:24:03,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:24:03,252 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:03,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 57 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:24:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 01:24:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 01:24:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 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) [2023-04-02 01:24:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-04-02 01:24:03,266 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2023-04-02 01:24:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:03,266 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-04-02 01:24:03,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 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) [2023-04-02 01:24:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-04-02 01:24:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 01:24:03,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:03,267 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:03,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:24:03,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 01:24:03,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:03,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:03,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1395208781, now seen corresponding path program 3 times [2023-04-02 01:24:03,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823905808] [2023-04-02 01:24:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:03,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 01:24:03,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:03,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823905808] [2023-04-02 01:24:03,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823905808] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:03,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516043496] [2023-04-02 01:24:03,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:24:03,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:03,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:03,689 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:03,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:24:03,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-02 01:24:03,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:03,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:24:03,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 115 proven. 15 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-02 01:24:03,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 115 proven. 15 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-02 01:24:03,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516043496] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:03,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:03,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-04-02 01:24:03,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550493630] [2023-04-02 01:24:03,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:24:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:24:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:24:03,895 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 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) [2023-04-02 01:24:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:04,119 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2023-04-02 01:24:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:24:04,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 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 43 [2023-04-02 01:24:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:04,120 INFO L225 Difference]: With dead ends: 95 [2023-04-02 01:24:04,120 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 01:24:04,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2023-04-02 01:24:04,121 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:04,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 37 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:24:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 01:24:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-04-02 01:24:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 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) [2023-04-02 01:24:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2023-04-02 01:24:04,134 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 43 [2023-04-02 01:24:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:04,134 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2023-04-02 01:24:04,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 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) [2023-04-02 01:24:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2023-04-02 01:24:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 01:24:04,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:04,136 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:04,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 01:24:04,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:04,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:04,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:04,343 INFO L85 PathProgramCache]: Analyzing trace with hash 538347785, now seen corresponding path program 4 times [2023-04-02 01:24:04,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:04,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838256900] [2023-04-02 01:24:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:04,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:04,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 01:24:04,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:04,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838256900] [2023-04-02 01:24:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838256900] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:04,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984994018] [2023-04-02 01:24:04,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:24:04,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:04,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:04,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:04,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:24:04,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:24:04,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:04,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:24:04,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 01:24:04,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-04-02 01:24:04,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984994018] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:04,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:04,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2023-04-02 01:24:04,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827636724] [2023-04-02 01:24:04,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:04,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 01:24:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 01:24:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-04-02 01:24:04,955 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:05,147 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2023-04-02 01:24:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 01:24:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-04-02 01:24:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:05,151 INFO L225 Difference]: With dead ends: 110 [2023-04-02 01:24:05,151 INFO L226 Difference]: Without dead ends: 102 [2023-04-02 01:24:05,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-04-02 01:24:05,153 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:05,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:24:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-02 01:24:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 77. [2023-04-02 01:24:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 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) [2023-04-02 01:24:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2023-04-02 01:24:05,184 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 63 [2023-04-02 01:24:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:05,185 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2023-04-02 01:24:05,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2023-04-02 01:24:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 01:24:05,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:05,186 INFO L195 NwaCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:05,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 01:24:05,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:05,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:05,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash -445755741, now seen corresponding path program 5 times [2023-04-02 01:24:05,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:05,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345362989] [2023-04-02 01:24:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:05,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:05,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-02 01:24:05,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:05,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345362989] [2023-04-02 01:24:05,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345362989] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:05,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941119334] [2023-04-02 01:24:05,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:24:05,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:05,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:05,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:05,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:24:06,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-04-02 01:24:06,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:06,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 01:24:06,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1280 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-04-02 01:24:06,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 30 proven. 1250 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-04-02 01:24:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941119334] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:07,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:07,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 28 [2023-04-02 01:24:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419720498] [2023-04-02 01:24:07,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-02 01:24:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-02 01:24:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2023-04-02 01:24:07,263 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 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) [2023-04-02 01:24:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:08,108 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2023-04-02 01:24:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:24:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 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 76 [2023-04-02 01:24:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:08,110 INFO L225 Difference]: With dead ends: 186 [2023-04-02 01:24:08,110 INFO L226 Difference]: Without dead ends: 181 [2023-04-02 01:24:08,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=1687, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 01:24:08,111 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 97 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:08,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 67 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:24:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-04-02 01:24:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-04-02 01:24:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0795454545454546) internal successors, (190), 176 states have internal predecessors, (190), 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) [2023-04-02 01:24:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 194 transitions. [2023-04-02 01:24:08,142 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 194 transitions. Word has length 76 [2023-04-02 01:24:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:08,142 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 194 transitions. [2023-04-02 01:24:08,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 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) [2023-04-02 01:24:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 194 transitions. [2023-04-02 01:24:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-02 01:24:08,144 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:08,144 INFO L195 NwaCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:08,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 01:24:08,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:08,369 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:08,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash -318167645, now seen corresponding path program 6 times [2023-04-02 01:24:08,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:08,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704010411] [2023-04-02 01:24:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:08,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:08,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-02 01:24:08,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704010411] [2023-04-02 01:24:08,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704010411] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375278141] [2023-04-02 01:24:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:24:08,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:08,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:08,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:24:15,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2023-04-02 01:24:15,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:15,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 01:24:15,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-02 01:24:16,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-02 01:24:16,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375278141] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:16,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:16,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2023-04-02 01:24:16,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908340242] [2023-04-02 01:24:16,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:16,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 01:24:16,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 01:24:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2023-04-02 01:24:16,690 INFO L87 Difference]: Start difference. First operand 181 states and 194 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 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) [2023-04-02 01:24:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:29,919 INFO L93 Difference]: Finished difference Result 394 states and 430 transitions. [2023-04-02 01:24:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 01:24:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 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 180 [2023-04-02 01:24:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:29,921 INFO L225 Difference]: With dead ends: 394 [2023-04-02 01:24:29,921 INFO L226 Difference]: Without dead ends: 389 [2023-04-02 01:24:29,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=985, Invalid=2555, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 01:24:29,923 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 167 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:29,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 77 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:24:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-04-02 01:24:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2023-04-02 01:24:29,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.078125) internal successors, (414), 384 states have internal predecessors, (414), 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) [2023-04-02 01:24:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 418 transitions. [2023-04-02 01:24:29,991 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 418 transitions. Word has length 180 [2023-04-02 01:24:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:29,992 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 418 transitions. [2023-04-02 01:24:29,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 31 states have internal predecessors, (116), 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) [2023-04-02 01:24:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 418 transitions. [2023-04-02 01:24:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-04-02 01:24:30,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:30,000 INFO L195 NwaCegarLoop]: trace histogram [290, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:30,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 01:24:30,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:30,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:30,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1293036637, now seen corresponding path program 7 times [2023-04-02 01:24:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:30,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625661510] [2023-04-02 01:24:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:32,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2023-04-02 01:24:32,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:32,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625661510] [2023-04-02 01:24:32,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625661510] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:32,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484398113] [2023-04-02 01:24:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:24:32,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:32,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:32,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:24:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:32,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-02 01:24:32,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2023-04-02 01:24:33,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2023-04-02 01:24:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484398113] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:35,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:35,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2023-04-02 01:24:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118929428] [2023-04-02 01:24:35,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-04-02 01:24:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-04-02 01:24:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 01:24:35,177 INFO L87 Difference]: Start difference. First operand 389 states and 418 transitions. Second operand has 64 states, 64 states have (on average 3.8125) internal successors, (244), 63 states have internal predecessors, (244), 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) [2023-04-02 01:24:52,953 WARN L223 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 128 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:25:09,076 WARN L223 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 124 DAG size of output: 16 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:26:37,777 WARN L839 $PredicateComparison]: unable to prove that (and (< (mod (+ 20 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.base| |c_old(#NULL.base)|) (< (mod (+ 6 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 14 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 13 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 4 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 3 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 15 c_main_~x~0) 4294967296) 268435455) (< (mod c_main_~x~0 4294967296) 268435455) (< (mod (+ 18 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 9 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 2 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 5 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 16 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 7 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 19 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 8 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 17 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 10 c_main_~x~0) 4294967296) 268435455) (< (mod (+ c_main_~x~0 11) 4294967296) 268435455) (< (mod (+ 12 c_main_~x~0) 4294967296) 268435455) (< (mod (+ 21 c_main_~x~0) 4294967296) 268435455) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< (mod (+ c_main_~x~0 1) 4294967296) 268435455) (< (mod (+ 22 c_main_~x~0) 4294967296) 268435455)) is different from false