/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/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 04:34:22,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 04:34:22,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 04:34:22,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 04:34:22,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 04:34:22,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 04:34:22,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 04:34:22,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 04:34:22,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 04:34:22,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 04:34:22,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 04:34:22,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 04:34:22,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 04:34:22,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 04:34:22,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 04:34:22,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 04:34:22,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 04:34:22,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 04:34:22,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 04:34:22,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 04:34:22,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 04:34:22,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 04:34:22,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 04:34:22,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 04:34:22,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 04:34:22,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 04:34:22,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 04:34:22,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 04:34:22,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 04:34:22,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 04:34:22,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 04:34:22,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 04:34:22,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 04:34:22,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 04:34:22,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 04:34:22,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 04:34:22,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 04:34:22,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 04:34:22,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 04:34:22,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 04:34:22,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 04:34:22,837 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 04:34:22,856 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 04:34:22,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 04:34:22,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 04:34:22,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 04:34:22,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 04:34:22,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 04:34:22,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 04:34:22,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 04:34:22,858 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 04:34:22,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 04:34:22,858 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 04:34:22,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 04:34:22,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 04:34:22,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 04:34:22,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 04:34:22,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 04:34:22,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 04:34:22,859 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 04:34:22,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 04:34:22,859 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 04:34:22,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 04:34:22,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 04:34:22,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 04:34:22,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 04:34:22,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:34:22,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 04:34:22,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 04:34:22,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 04:34:22,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 04:34:22,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 04:34:22,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 04:34:22,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 04:34:22,861 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 04:34:22,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 04:34:22,861 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 04:34:22,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 04:34:23,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 04:34:23,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 04:34:23,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 04:34:23,085 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 04:34:23,085 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 04:34:23,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2023-04-02 04:34:24,095 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 04:34:24,281 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 04:34:24,281 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2023-04-02 04:34:24,286 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69877d5c/203fcf4a746c4cbc928edb5919917736/FLAG47dcd4bc2 [2023-04-02 04:34:24,299 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69877d5c/203fcf4a746c4cbc928edb5919917736 [2023-04-02 04:34:24,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 04:34:24,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 04:34:24,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 04:34:24,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 04:34:24,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 04:34:24,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f11d29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24, skipping insertion in model container [2023-04-02 04:34:24,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 04:34:24,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 04:34:24,439 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/recursive/MultCommutative-2.c[970,983] [2023-04-02 04:34:24,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:34:24,451 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 04:34:24,461 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/recursive/MultCommutative-2.c[970,983] [2023-04-02 04:34:24,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 04:34:24,475 INFO L208 MainTranslator]: Completed translation [2023-04-02 04:34:24,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24 WrapperNode [2023-04-02 04:34:24,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 04:34:24,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 04:34:24,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 04:34:24,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 04:34:24,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,492 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 04:34:24,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 04:34:24,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 04:34:24,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 04:34:24,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (1/1) ... [2023-04-02 04:34:24,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 04:34:24,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:24,520 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 04:34:24,525 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 04:34:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 04:34:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 04:34:24,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 04:34:24,550 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2023-04-02 04:34:24,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 04:34:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 04:34:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 04:34:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 04:34:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 04:34:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 04:34:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 04:34:24,600 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 04:34:24,602 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 04:34:24,693 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 04:34:24,697 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 04:34:24,697 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 04:34:24,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:34:24 BoogieIcfgContainer [2023-04-02 04:34:24,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 04:34:24,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 04:34:24,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 04:34:24,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 04:34:24,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:34:24" (1/3) ... [2023-04-02 04:34:24,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64866f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:34:24, skipping insertion in model container [2023-04-02 04:34:24,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:34:24" (2/3) ... [2023-04-02 04:34:24,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64866f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:34:24, skipping insertion in model container [2023-04-02 04:34:24,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:34:24" (3/3) ... [2023-04-02 04:34:24,714 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2023-04-02 04:34:24,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 04:34:24,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 04:34:24,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 04:34:24,772 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;@382c5eb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 04:34:24,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 04:34:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 04:34:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 04:34:24,781 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:24,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:24,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:24,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 156428420, now seen corresponding path program 1 times [2023-04-02 04:34:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:24,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109662079] [2023-04-02 04:34:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:24,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-02 04:34:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 04:34:25,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:25,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109662079] [2023-04-02 04:34:25,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109662079] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 04:34:25,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 04:34:25,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 04:34:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657485185] [2023-04-02 04:34:25,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 04:34:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 04:34:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:25,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 04:34:25,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 04:34:25,236 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 04:34:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:25,452 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-04-02 04:34:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 04:34:25,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-02 04:34:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:25,460 INFO L225 Difference]: With dead ends: 48 [2023-04-02 04:34:25,460 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 04:34:25,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-02 04:34:25,468 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:25,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:34:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 04:34:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-04-02 04:34:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-02 04:34:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-04-02 04:34:25,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 24 [2023-04-02 04:34:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:25,517 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-04-02 04:34:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 04:34:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-04-02 04:34:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 04:34:25,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:25,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 04:34:25,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:25,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1285538244, now seen corresponding path program 1 times [2023-04-02 04:34:25,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:25,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242897359] [2023-04-02 04:34:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-02 04:34:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:34:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 04:34:25,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:25,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242897359] [2023-04-02 04:34:25,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242897359] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:25,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071222084] [2023-04-02 04:34:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:25,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:25,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:25,794 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 04:34:25,796 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 04:34:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:25,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 04:34:25,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 04:34:25,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 04:34:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071222084] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:34:26,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:34:26,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 14 [2023-04-02 04:34:26,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833530413] [2023-04-02 04:34:26,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:26,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 04:34:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:26,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 04:34:26,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-04-02 04:34:26,013 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 04:34:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:26,251 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2023-04-02 04:34:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 04:34:26,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 30 [2023-04-02 04:34:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:26,254 INFO L225 Difference]: With dead ends: 56 [2023-04-02 04:34:26,254 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 04:34:26,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-04-02 04:34:26,257 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:26,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:34:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 04:34:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-02 04:34:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-02 04:34:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-04-02 04:34:26,268 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 30 [2023-04-02 04:34:26,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:26,269 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-04-02 04:34:26,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 04:34:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-04-02 04:34:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 04:34:26,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:26,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:26,283 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 04:34:26,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:26,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:26,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1029208082, now seen corresponding path program 1 times [2023-04-02 04:34:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:26,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234991325] [2023-04-02 04:34:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:26,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 04:34:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 04:34:26,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:26,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234991325] [2023-04-02 04:34:26,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234991325] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 04:34:26,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 04:34:26,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 04:34:26,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323984618] [2023-04-02 04:34:26,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 04:34:26,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 04:34:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 04:34:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 04:34:26,585 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 04:34:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:26,670 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-04-02 04:34:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 04:34:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-04-02 04:34:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:26,672 INFO L225 Difference]: With dead ends: 35 [2023-04-02 04:34:26,672 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 04:34:26,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-02 04:34:26,675 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:26,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:34:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 04:34:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 04:34:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-02 04:34:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-04-02 04:34:26,687 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 31 [2023-04-02 04:34:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:26,688 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-04-02 04:34:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 04:34:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-04-02 04:34:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 04:34:26,695 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:26,695 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:26,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 04:34:26,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:26,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:26,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1780942468, now seen corresponding path program 1 times [2023-04-02 04:34:26,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:26,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576336546] [2023-04-02 04:34:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:26,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 04:34:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-04-02 04:34:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 04:34:26,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:26,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576336546] [2023-04-02 04:34:26,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576336546] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074871290] [2023-04-02 04:34:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:26,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:26,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:26,841 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 04:34:26,844 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 04:34:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:26,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 04:34:26,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 04:34:26,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-02 04:34:27,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074871290] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:34:27,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:34:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2023-04-02 04:34:27,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133139541] [2023-04-02 04:34:27,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:27,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 04:34:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 04:34:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-02 04:34:27,092 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-02 04:34:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:27,186 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-04-02 04:34:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 04:34:27,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 51 [2023-04-02 04:34:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:27,188 INFO L225 Difference]: With dead ends: 50 [2023-04-02 04:34:27,188 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 04:34:27,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-04-02 04:34:27,191 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:27,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 04:34:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 04:34:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 04:34:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 04:34:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 04:34:27,197 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 51 [2023-04-02 04:34:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:27,198 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 04:34:27,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-02 04:34:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 04:34:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 04:34:27,200 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:27,200 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:27,215 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 04:34:27,404 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 04:34:27,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:27,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:27,405 INFO L85 PathProgramCache]: Analyzing trace with hash 556765202, now seen corresponding path program 2 times [2023-04-02 04:34:27,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:27,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730787380] [2023-04-02 04:34:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:27,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:27,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:27,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:27,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 04:34:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:27,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 04:34:27,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:27,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730787380] [2023-04-02 04:34:27,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730787380] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:27,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180761943] [2023-04-02 04:34:27,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:34:27,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:27,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:27,817 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 04:34:27,840 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 04:34:27,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:34:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:34:27,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 04:34:27,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 04:34:28,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 04:34:28,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180761943] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:34:28,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:34:28,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 14] total 36 [2023-04-02 04:34:28,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265029476] [2023-04-02 04:34:28,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:28,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-02 04:34:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-02 04:34:28,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 04:34:28,787 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 24 states have internal predecessors, (52), 8 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-02 04:34:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:29,173 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-04-02 04:34:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 04:34:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 24 states have internal predecessors, (52), 8 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 38 [2023-04-02 04:34:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:29,174 INFO L225 Difference]: With dead ends: 37 [2023-04-02 04:34:29,175 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 04:34:29,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 04:34:29,176 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:29,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 107 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 04:34:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 04:34:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-02 04:34:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-02 04:34:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-04-02 04:34:29,180 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 38 [2023-04-02 04:34:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:29,180 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-04-02 04:34:29,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 24 states have internal predecessors, (52), 8 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-02 04:34:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-04-02 04:34:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 04:34:29,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:29,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:29,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 04:34:29,388 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 04:34:29,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:29,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 436635868, now seen corresponding path program 3 times [2023-04-02 04:34:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:29,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883159117] [2023-04-02 04:34:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:29,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:29,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:29,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 04:34:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:29,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:29,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 04:34:29,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:29,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883159117] [2023-04-02 04:34:29,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883159117] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:29,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768208769] [2023-04-02 04:34:29,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:34:29,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:29,836 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 04:34:29,882 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 04:34:29,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 04:34:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:34:29,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-02 04:34:29,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 04:34:30,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 04:34:31,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768208769] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:34:31,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:34:31,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 50 [2023-04-02 04:34:31,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248523808] [2023-04-02 04:34:31,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 04:34:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 04:34:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2249, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 04:34:31,563 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 50 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 34 states have internal predecessors, (70), 10 states have call successors, (13), 2 states have call predecessors, (13), 14 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-04-02 04:34:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:32,664 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-04-02 04:34:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 04:34:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 34 states have internal predecessors, (70), 10 states have call successors, (13), 2 states have call predecessors, (13), 14 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 45 [2023-04-02 04:34:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:32,666 INFO L225 Difference]: With dead ends: 62 [2023-04-02 04:34:32,666 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 04:34:32,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=581, Invalid=4821, Unknown=0, NotChecked=0, Total=5402 [2023-04-02 04:34:32,668 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:32,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 117 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 04:34:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 04:34:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-04-02 04:34:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2023-04-02 04:34:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-04-02 04:34:32,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 45 [2023-04-02 04:34:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:32,674 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-04-02 04:34:32,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 34 states have internal predecessors, (70), 10 states have call successors, (13), 2 states have call predecessors, (13), 14 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-04-02 04:34:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-04-02 04:34:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 04:34:32,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:32,675 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:32,682 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 04:34:32,882 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 04:34:32,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:32,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash 346523370, now seen corresponding path program 4 times [2023-04-02 04:34:32,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:32,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675676255] [2023-04-02 04:34:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:32,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:33,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:33,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:33,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:34:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:33,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 04:34:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675676255] [2023-04-02 04:34:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675676255] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104015021] [2023-04-02 04:34:33,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:34:33,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:33,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:33,272 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 04:34:33,306 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 04:34:33,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:34:33,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:34:33,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-02 04:34:33,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 04:34:33,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 04:34:34,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104015021] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:34:34,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:34:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 49 [2023-04-02 04:34:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022555598] [2023-04-02 04:34:34,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:34,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 04:34:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 04:34:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 04:34:34,468 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 49 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 33 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-04-02 04:34:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:35,316 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2023-04-02 04:34:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 04:34:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 33 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 45 [2023-04-02 04:34:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:35,317 INFO L225 Difference]: With dead ends: 62 [2023-04-02 04:34:35,317 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 04:34:35,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=529, Invalid=4441, Unknown=0, NotChecked=0, Total=4970 [2023-04-02 04:34:35,319 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:35,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 122 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 04:34:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 04:34:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2023-04-02 04:34:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (18), 10 states have call predecessors, (18), 8 states have call successors, (18) [2023-04-02 04:34:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2023-04-02 04:34:35,324 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 45 [2023-04-02 04:34:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:35,325 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2023-04-02 04:34:35,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 33 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-04-02 04:34:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2023-04-02 04:34:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 04:34:35,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:35,326 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:35,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 04:34:35,541 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 04:34:35,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:35,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:35,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1619694410, now seen corresponding path program 5 times [2023-04-02 04:34:35,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:35,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821201034] [2023-04-02 04:34:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:35,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:35,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:35,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:35,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:35,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:35,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-02 04:34:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:36,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-02 04:34:36,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:36,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821201034] [2023-04-02 04:34:36,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821201034] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:36,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500316829] [2023-04-02 04:34:36,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:34:36,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:36,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:36,125 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 04:34:36,128 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 04:34:36,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-02 04:34:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:34:36,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 85 conjunts are in the unsatisfiable core [2023-04-02 04:34:36,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-04-02 04:34:36,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500316829] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:40,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:34:40,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 35 [2023-04-02 04:34:40,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464308021] [2023-04-02 04:34:40,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 04:34:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 04:34:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2457, Unknown=4, NotChecked=0, Total=2652 [2023-04-02 04:34:40,613 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 35 states, 32 states have (on average 1.34375) internal successors, (43), 22 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 04:34:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:41,418 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-04-02 04:34:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 04:34:41,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.34375) internal successors, (43), 22 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 5 states have call successors, (13) Word has length 59 [2023-04-02 04:34:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:41,419 INFO L225 Difference]: With dead ends: 66 [2023-04-02 04:34:41,419 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 04:34:41,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=438, Invalid=4114, Unknown=4, NotChecked=0, Total=4556 [2023-04-02 04:34:41,421 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:41,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 122 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 04:34:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 04:34:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2023-04-02 04:34:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (24), 12 states have call predecessors, (24), 9 states have call successors, (24) [2023-04-02 04:34:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2023-04-02 04:34:41,428 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 59 [2023-04-02 04:34:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:41,428 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2023-04-02 04:34:41,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.34375) internal successors, (43), 22 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 04:34:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2023-04-02 04:34:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 04:34:41,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:41,429 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:41,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 04:34:41,637 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 04:34:41,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:41,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1686458552, now seen corresponding path program 6 times [2023-04-02 04:34:41,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:41,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155938052] [2023-04-02 04:34:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:41,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:41,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:41,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-02 04:34:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 04:34:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155938052] [2023-04-02 04:34:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155938052] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441245766] [2023-04-02 04:34:42,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 04:34:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:42,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:42,521 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 04:34:42,524 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 04:34:42,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-04-02 04:34:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:34:42,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 109 conjunts are in the unsatisfiable core [2023-04-02 04:34:42,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 04:34:43,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441245766] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:45,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:34:45,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18] total 41 [2023-04-02 04:34:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912902439] [2023-04-02 04:34:45,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:45,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 04:34:45,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 04:34:45,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3552, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 04:34:45,428 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 04:34:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:46,363 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2023-04-02 04:34:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 04:34:46,363 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) Word has length 73 [2023-04-02 04:34:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:46,364 INFO L225 Difference]: With dead ends: 70 [2023-04-02 04:34:46,365 INFO L226 Difference]: Without dead ends: 66 [2023-04-02 04:34:46,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=529, Invalid=5477, Unknown=0, NotChecked=0, Total=6006 [2023-04-02 04:34:46,366 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:46,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 132 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 04:34:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-02 04:34:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2023-04-02 04:34:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (29), 13 states have call predecessors, (29), 9 states have call successors, (29) [2023-04-02 04:34:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2023-04-02 04:34:46,374 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 73 [2023-04-02 04:34:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:46,374 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2023-04-02 04:34:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 04:34:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2023-04-02 04:34:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 04:34:46,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:46,375 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:46,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 04:34:46,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:46,575 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:46,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash 310444680, now seen corresponding path program 7 times [2023-04-02 04:34:46,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:46,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396683388] [2023-04-02 04:34:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:46,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:46,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:46,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-02 04:34:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-04-02 04:34:47,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396683388] [2023-04-02 04:34:47,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396683388] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564169493] [2023-04-02 04:34:47,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 04:34:47,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:47,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:47,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:34:47,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 04:34:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:47,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 121 conjunts are in the unsatisfiable core [2023-04-02 04:34:47,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-04-02 04:34:48,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:50,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564169493] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:50,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:34:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 45 [2023-04-02 04:34:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215532868] [2023-04-02 04:34:50,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:50,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-02 04:34:50,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-02 04:34:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4304, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 04:34:50,850 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 04:34:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:51,978 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2023-04-02 04:34:51,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 04:34:51,978 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) Word has length 80 [2023-04-02 04:34:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:51,979 INFO L225 Difference]: With dead ends: 76 [2023-04-02 04:34:51,979 INFO L226 Difference]: Without dead ends: 72 [2023-04-02 04:34:51,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=612, Invalid=6698, Unknown=0, NotChecked=0, Total=7310 [2023-04-02 04:34:51,981 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:51,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 137 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 04:34:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-02 04:34:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2023-04-02 04:34:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (34), 14 states have call predecessors, (34), 9 states have call successors, (34) [2023-04-02 04:34:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 85 transitions. [2023-04-02 04:34:51,989 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 85 transitions. Word has length 80 [2023-04-02 04:34:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:51,989 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 85 transitions. [2023-04-02 04:34:51,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 04:34:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 85 transitions. [2023-04-02 04:34:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-02 04:34:51,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:51,990 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:52,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 04:34:52,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 04:34:52,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:52,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -21388506, now seen corresponding path program 8 times [2023-04-02 04:34:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350245037] [2023-04-02 04:34:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-02 04:34:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-02 04:34:53,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:34:53,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350245037] [2023-04-02 04:34:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350245037] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:34:53,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312727754] [2023-04-02 04:34:53,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:34:53,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:34:53,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:34:53,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 04:34:53,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:34:53,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:34:53,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 133 conjunts are in the unsatisfiable core [2023-04-02 04:34:53,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:34:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-04-02 04:34:54,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:34:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 35 proven. 253 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-02 04:34:57,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312727754] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:34:57,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:34:57,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22, 36] total 74 [2023-04-02 04:34:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290244782] [2023-04-02 04:34:57,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:34:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-04-02 04:34:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:34:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-04-02 04:34:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=5128, Unknown=0, NotChecked=0, Total=5402 [2023-04-02 04:34:57,190 INFO L87 Difference]: Start difference. First operand 59 states and 85 transitions. Second operand has 74 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 44 states have internal predecessors, (100), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-04-02 04:34:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:34:59,513 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2023-04-02 04:34:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 04:34:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 44 states have internal predecessors, (100), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) Word has length 87 [2023-04-02 04:34:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:34:59,514 INFO L225 Difference]: With dead ends: 92 [2023-04-02 04:34:59,515 INFO L226 Difference]: Without dead ends: 86 [2023-04-02 04:34:59,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=853, Invalid=9859, Unknown=0, NotChecked=0, Total=10712 [2023-04-02 04:34:59,517 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 76 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 04:34:59,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 237 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 04:34:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-02 04:34:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-04-02 04:34:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 11 states have call successors, (11), 6 states have call predecessors, (11), 15 states have return successors, (45), 19 states have call predecessors, (45), 10 states have call successors, (45) [2023-04-02 04:34:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 111 transitions. [2023-04-02 04:34:59,525 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 111 transitions. Word has length 87 [2023-04-02 04:34:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:34:59,525 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 111 transitions. [2023-04-02 04:34:59,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 44 states have internal predecessors, (100), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-04-02 04:34:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 111 transitions. [2023-04-02 04:34:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 04:34:59,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:34:59,526 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:34:59,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 04:34:59,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:34:59,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:34:59,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:34:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1548198130, now seen corresponding path program 9 times [2023-04-02 04:34:59,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:34:59,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691270884] [2023-04-02 04:34:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:34:59,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:34:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:59,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:34:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:59,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:34:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:34:59,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:34:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:35:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 04:35:00,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:00,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691270884] [2023-04-02 04:35:00,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691270884] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:00,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239941934] [2023-04-02 04:35:00,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:35:00,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:00,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:00,528 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:00,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 04:35:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-02 04:35:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:00,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 109 conjunts are in the unsatisfiable core [2023-04-02 04:35:00,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-04-02 04:35:01,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 04:35:03,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239941934] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:35:03,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:35:03,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 30] total 63 [2023-04-02 04:35:03,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364400268] [2023-04-02 04:35:03,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:03,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-04-02 04:35:03,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-04-02 04:35:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3678, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 04:35:03,202 INFO L87 Difference]: Start difference. First operand 78 states and 111 transitions. Second operand has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 38 states have internal predecessors, (85), 13 states have call successors, (16), 2 states have call predecessors, (16), 18 states have return successors, (26), 25 states have call predecessors, (26), 13 states have call successors, (26) [2023-04-02 04:35:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:04,932 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2023-04-02 04:35:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 04:35:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 38 states have internal predecessors, (85), 13 states have call successors, (16), 2 states have call predecessors, (16), 18 states have return successors, (26), 25 states have call predecessors, (26), 13 states have call successors, (26) Word has length 73 [2023-04-02 04:35:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:04,933 INFO L225 Difference]: With dead ends: 94 [2023-04-02 04:35:04,933 INFO L226 Difference]: Without dead ends: 86 [2023-04-02 04:35:04,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=738, Invalid=7818, Unknown=0, NotChecked=0, Total=8556 [2023-04-02 04:35:04,935 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:04,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 167 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 04:35:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-02 04:35:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2023-04-02 04:35:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 15 states have return successors, (34), 18 states have call predecessors, (34), 8 states have call successors, (34) [2023-04-02 04:35:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2023-04-02 04:35:04,942 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 73 [2023-04-02 04:35:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:04,942 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2023-04-02 04:35:04,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 38 states have internal predecessors, (85), 13 states have call successors, (16), 2 states have call predecessors, (16), 18 states have return successors, (26), 25 states have call predecessors, (26), 13 states have call successors, (26) [2023-04-02 04:35:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2023-04-02 04:35:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 04:35:04,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:04,943 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:04,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:05,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 04:35:05,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:05,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -974033366, now seen corresponding path program 10 times [2023-04-02 04:35:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:05,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059653794] [2023-04-02 04:35:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-02 04:35:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-02 04:35:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059653794] [2023-04-02 04:35:05,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059653794] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121653269] [2023-04-02 04:35:05,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:35:05,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:05,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:05,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:05,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 04:35:05,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:35:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:05,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 109 conjunts are in the unsatisfiable core [2023-04-02 04:35:05,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 04:35:06,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:08,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121653269] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:08,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:35:08,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18] total 41 [2023-04-02 04:35:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675011674] [2023-04-02 04:35:08,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:08,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 04:35:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:08,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 04:35:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 04:35:08,546 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 04:35:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:09,486 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2023-04-02 04:35:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 04:35:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) Word has length 73 [2023-04-02 04:35:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:09,487 INFO L225 Difference]: With dead ends: 84 [2023-04-02 04:35:09,487 INFO L226 Difference]: Without dead ends: 78 [2023-04-02 04:35:09,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=525, Invalid=5481, Unknown=0, NotChecked=0, Total=6006 [2023-04-02 04:35:09,488 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:09,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 142 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 04:35:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-02 04:35:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2023-04-02 04:35:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 10 states have call successors, (10), 5 states have call predecessors, (10), 15 states have return successors, (35), 19 states have call predecessors, (35), 9 states have call successors, (35) [2023-04-02 04:35:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-04-02 04:35:09,495 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 73 [2023-04-02 04:35:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:09,495 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-04-02 04:35:09,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 04:35:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-04-02 04:35:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 04:35:09,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:09,496 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:09,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:09,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 04:35:09,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:09,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1781487452, now seen corresponding path program 11 times [2023-04-02 04:35:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840894055] [2023-04-02 04:35:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:09,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:09,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:09,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:09,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:09,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 04:35:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:09,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:09,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:10,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 04:35:10,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:10,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840894055] [2023-04-02 04:35:10,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840894055] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:10,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810848949] [2023-04-02 04:35:10,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:35:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:10,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:10,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 04:35:10,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-04-02 04:35:10,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:10,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 69 conjunts are in the unsatisfiable core [2023-04-02 04:35:10,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 04:35:10,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 04:35:11,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810848949] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:35:11,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:35:11,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 23] total 57 [2023-04-02 04:35:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073021262] [2023-04-02 04:35:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:11,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-04-02 04:35:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:11,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-04-02 04:35:11,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2969, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 04:35:11,821 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 38 states have internal predecessors, (79), 11 states have call successors, (14), 2 states have call predecessors, (14), 17 states have return successors, (19), 19 states have call predecessors, (19), 11 states have call successors, (19) [2023-04-02 04:35:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:13,113 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-04-02 04:35:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 04:35:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 38 states have internal predecessors, (79), 11 states have call successors, (14), 2 states have call predecessors, (14), 17 states have return successors, (19), 19 states have call predecessors, (19), 11 states have call successors, (19) Word has length 52 [2023-04-02 04:35:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:13,114 INFO L225 Difference]: With dead ends: 90 [2023-04-02 04:35:13,114 INFO L226 Difference]: Without dead ends: 86 [2023-04-02 04:35:13,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=711, Invalid=6095, Unknown=0, NotChecked=0, Total=6806 [2023-04-02 04:35:13,115 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:13,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 157 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 04:35:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-02 04:35:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2023-04-02 04:35:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 10 states have call successors, (10), 5 states have call predecessors, (10), 15 states have return successors, (34), 19 states have call predecessors, (34), 9 states have call successors, (34) [2023-04-02 04:35:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2023-04-02 04:35:13,135 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 52 [2023-04-02 04:35:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:13,135 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2023-04-02 04:35:13,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 38 states have internal predecessors, (79), 11 states have call successors, (14), 2 states have call predecessors, (14), 17 states have return successors, (19), 19 states have call predecessors, (19), 11 states have call successors, (19) [2023-04-02 04:35:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2023-04-02 04:35:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 04:35:13,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:13,136 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:13,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 04:35:13,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:13,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash 689777486, now seen corresponding path program 12 times [2023-04-02 04:35:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705654997] [2023-04-02 04:35:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:13,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:13,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:13,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:13,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:13,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:13,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:13,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-02 04:35:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-02 04:35:14,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:14,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705654997] [2023-04-02 04:35:14,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705654997] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:14,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211252321] [2023-04-02 04:35:14,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 04:35:14,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:14,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:14,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:14,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 04:35:14,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-04-02 04:35:14,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:14,725 WARN L260 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 157 conjunts are in the unsatisfiable core [2023-04-02 04:35:14,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 7 proven. 234 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2023-04-02 04:35:15,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211252321] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:19,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:35:19,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24] total 55 [2023-04-02 04:35:19,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873555538] [2023-04-02 04:35:19,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:19,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-04-02 04:35:19,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-04-02 04:35:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=6338, Unknown=0, NotChecked=0, Total=6642 [2023-04-02 04:35:19,173 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 55 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 32 states have internal predecessors, (63), 5 states have call successors, (8), 2 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-02 04:35:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:20,738 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2023-04-02 04:35:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 04:35:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 32 states have internal predecessors, (63), 5 states have call successors, (8), 2 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) Word has length 101 [2023-04-02 04:35:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:20,739 INFO L225 Difference]: With dead ends: 88 [2023-04-02 04:35:20,739 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 04:35:20,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=800, Invalid=9912, Unknown=0, NotChecked=0, Total=10712 [2023-04-02 04:35:20,741 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:20,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 187 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1931 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 04:35:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 04:35:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2023-04-02 04:35:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 10 states have call successors, (10), 5 states have call predecessors, (10), 16 states have return successors, (39), 20 states have call predecessors, (39), 9 states have call successors, (39) [2023-04-02 04:35:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2023-04-02 04:35:20,748 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 101 [2023-04-02 04:35:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:20,751 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2023-04-02 04:35:20,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 32 states have internal predecessors, (63), 5 states have call successors, (8), 2 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-02 04:35:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2023-04-02 04:35:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-02 04:35:20,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:20,752 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:20,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:20,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 04:35:20,957 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:20,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1286484896, now seen corresponding path program 13 times [2023-04-02 04:35:20,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:20,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059712477] [2023-04-02 04:35:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:20,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:35:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:21,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-02 04:35:22,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059712477] [2023-04-02 04:35:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059712477] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900698587] [2023-04-02 04:35:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 04:35:22,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:22,016 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:22,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 04:35:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:22,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 133 conjunts are in the unsatisfiable core [2023-04-02 04:35:22,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-04-02 04:35:22,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-02 04:35:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900698587] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:35:25,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:35:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 36] total 75 [2023-04-02 04:35:25,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739699620] [2023-04-02 04:35:25,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:25,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-04-02 04:35:25,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:25,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-04-02 04:35:25,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=5278, Unknown=0, NotChecked=0, Total=5550 [2023-04-02 04:35:25,829 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 75 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 44 states have internal predecessors, (101), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (32), 31 states have call predecessors, (32), 15 states have call successors, (32) [2023-04-02 04:35:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:27,932 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2023-04-02 04:35:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 04:35:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 44 states have internal predecessors, (101), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (32), 31 states have call predecessors, (32), 15 states have call successors, (32) Word has length 87 [2023-04-02 04:35:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:27,933 INFO L225 Difference]: With dead ends: 100 [2023-04-02 04:35:27,934 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 04:35:27,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2388 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=902, Invalid=10440, Unknown=0, NotChecked=0, Total=11342 [2023-04-02 04:35:27,935 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 159 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:27,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 242 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 04:35:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 04:35:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2023-04-02 04:35:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 10 states have call successors, (10), 5 states have call predecessors, (10), 17 states have return successors, (37), 21 states have call predecessors, (37), 9 states have call successors, (37) [2023-04-02 04:35:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-04-02 04:35:27,941 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 87 [2023-04-02 04:35:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:27,942 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-04-02 04:35:27,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 44 states have internal predecessors, (101), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (32), 31 states have call predecessors, (32), 15 states have call successors, (32) [2023-04-02 04:35:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-04-02 04:35:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 04:35:27,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:27,943 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:27,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:28,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:28,149 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:28,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1809878856, now seen corresponding path program 14 times [2023-04-02 04:35:28,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:28,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230123710] [2023-04-02 04:35:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-04-02 04:35:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-04-02 04:35:28,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230123710] [2023-04-02 04:35:28,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230123710] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222381275] [2023-04-02 04:35:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:35:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:28,962 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:28,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 04:35:29,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:35:29,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:29,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 121 conjunts are in the unsatisfiable core [2023-04-02 04:35:29,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 3 proven. 136 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-04-02 04:35:29,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222381275] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:31,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:35:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 45 [2023-04-02 04:35:31,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971798395] [2023-04-02 04:35:31,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:31,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-02 04:35:31,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-02 04:35:31,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3799, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 04:35:31,895 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 04:35:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:33,036 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2023-04-02 04:35:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 04:35:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) Word has length 80 [2023-04-02 04:35:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:33,039 INFO L225 Difference]: With dead ends: 92 [2023-04-02 04:35:33,039 INFO L226 Difference]: Without dead ends: 86 [2023-04-02 04:35:33,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=581, Invalid=6391, Unknown=0, NotChecked=0, Total=6972 [2023-04-02 04:35:33,040 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:33,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 167 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 04:35:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-02 04:35:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-04-02 04:35:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 10 states have call successors, (10), 5 states have call predecessors, (10), 17 states have return successors, (37), 21 states have call predecessors, (37), 9 states have call successors, (37) [2023-04-02 04:35:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-04-02 04:35:33,046 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 80 [2023-04-02 04:35:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:33,046 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-04-02 04:35:33,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-02 04:35:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-04-02 04:35:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 04:35:33,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:33,047 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:33,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:33,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 04:35:33,253 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:33,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1500307766, now seen corresponding path program 15 times [2023-04-02 04:35:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:33,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064410502] [2023-04-02 04:35:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:33,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 04:35:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 04:35:33,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:33,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064410502] [2023-04-02 04:35:33,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064410502] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:33,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795376706] [2023-04-02 04:35:33,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:35:33,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:33,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:33,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 04:35:33,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-02 04:35:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:33,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-02 04:35:33,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-04-02 04:35:34,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 04:35:35,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795376706] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:35:35,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:35:35,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 26] total 64 [2023-04-02 04:35:35,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072981403] [2023-04-02 04:35:35,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:35,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-04-02 04:35:35,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:35,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-04-02 04:35:35,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3787, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 04:35:35,923 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 64 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 42 states have internal predecessors, (88), 12 states have call successors, (15), 2 states have call predecessors, (15), 20 states have return successors, (22), 22 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-02 04:35:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:37,624 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2023-04-02 04:35:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 04:35:37,625 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 42 states have internal predecessors, (88), 12 states have call successors, (15), 2 states have call predecessors, (15), 20 states have return successors, (22), 22 states have call predecessors, (22), 12 states have call successors, (22) Word has length 59 [2023-04-02 04:35:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:37,625 INFO L225 Difference]: With dead ends: 98 [2023-04-02 04:35:37,626 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 04:35:37,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=863, Invalid=7879, Unknown=0, NotChecked=0, Total=8742 [2023-04-02 04:35:37,627 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:37,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 172 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 04:35:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 04:35:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2023-04-02 04:35:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 10 states have call successors, (10), 5 states have call predecessors, (10), 17 states have return successors, (36), 21 states have call predecessors, (36), 9 states have call successors, (36) [2023-04-02 04:35:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-04-02 04:35:37,634 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 59 [2023-04-02 04:35:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:37,634 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-04-02 04:35:37,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 42 states have internal predecessors, (88), 12 states have call successors, (15), 2 states have call predecessors, (15), 20 states have return successors, (22), 22 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-02 04:35:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-04-02 04:35:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 04:35:37,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:37,635 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:37,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:37,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 04:35:37,840 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:37,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:37,841 INFO L85 PathProgramCache]: Analyzing trace with hash -20306336, now seen corresponding path program 16 times [2023-04-02 04:35:37,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:37,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117916020] [2023-04-02 04:35:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:37,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-02 04:35:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:38,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:39,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:39,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:39,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2023-04-02 04:35:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117916020] [2023-04-02 04:35:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117916020] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007845578] [2023-04-02 04:35:39,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:35:39,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:39,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:39,296 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:39,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 04:35:39,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:35:39,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:39,409 WARN L260 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 169 conjunts are in the unsatisfiable core [2023-04-02 04:35:39,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-02 04:35:40,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 47 proven. 445 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-04-02 04:35:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007845578] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:35:44,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:35:44,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26, 46] total 92 [2023-04-02 04:35:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351402230] [2023-04-02 04:35:44,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-04-02 04:35:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-04-02 04:35:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=8024, Unknown=0, NotChecked=0, Total=8372 [2023-04-02 04:35:44,782 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 92 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 54 states have internal predecessors, (123), 18 states have call successors, (21), 2 states have call predecessors, (21), 28 states have return successors, (39), 38 states have call predecessors, (39), 18 states have call successors, (39) [2023-04-02 04:35:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:47,772 INFO L93 Difference]: Finished difference Result 106 states and 143 transitions. [2023-04-02 04:35:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-02 04:35:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 54 states have internal predecessors, (123), 18 states have call successors, (21), 2 states have call predecessors, (21), 28 states have return successors, (39), 38 states have call predecessors, (39), 18 states have call successors, (39) Word has length 108 [2023-04-02 04:35:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:47,773 INFO L225 Difference]: With dead ends: 106 [2023-04-02 04:35:47,773 INFO L226 Difference]: Without dead ends: 100 [2023-04-02 04:35:47,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 187 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1114, Invalid=14636, Unknown=0, NotChecked=0, Total=15750 [2023-04-02 04:35:47,775 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4169 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 4214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 4169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:47,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 297 Invalid, 4214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 4169 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 04:35:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-02 04:35:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2023-04-02 04:35:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 10 states have call successors, (10), 5 states have call predecessors, (10), 19 states have return successors, (39), 23 states have call predecessors, (39), 9 states have call successors, (39) [2023-04-02 04:35:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2023-04-02 04:35:47,781 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 108 [2023-04-02 04:35:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:47,781 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2023-04-02 04:35:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 54 states have internal predecessors, (123), 18 states have call successors, (21), 2 states have call predecessors, (21), 28 states have return successors, (39), 38 states have call predecessors, (39), 18 states have call successors, (39) [2023-04-02 04:35:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2023-04-02 04:35:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-02 04:35:47,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:47,782 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:47,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:47,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:47,987 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:47,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash -216482856, now seen corresponding path program 17 times [2023-04-02 04:35:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:47,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424404] [2023-04-02 04:35:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-02 04:35:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-02 04:35:48,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424404] [2023-04-02 04:35:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424404] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240312060] [2023-04-02 04:35:48,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:35:48,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:48,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:48,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 04:35:48,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-04-02 04:35:48,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:49,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 133 conjunts are in the unsatisfiable core [2023-04-02 04:35:49,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 3 proven. 168 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-04-02 04:35:49,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:35:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 11 proven. 259 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 04:35:51,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240312060] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:35:51,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:35:51,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22, 27] total 66 [2023-04-02 04:35:51,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200137078] [2023-04-02 04:35:51,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:35:51,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-04-02 04:35:51,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:35:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-04-02 04:35:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=4053, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 04:35:51,889 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 66 states, 62 states have (on average 1.3870967741935485) internal successors, (86), 39 states have internal predecessors, (86), 12 states have call successors, (15), 2 states have call predecessors, (15), 20 states have return successors, (28), 27 states have call predecessors, (28), 12 states have call successors, (28) [2023-04-02 04:35:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:35:53,942 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2023-04-02 04:35:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 04:35:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 62 states have (on average 1.3870967741935485) internal successors, (86), 39 states have internal predecessors, (86), 12 states have call successors, (15), 2 states have call predecessors, (15), 20 states have return successors, (28), 27 states have call predecessors, (28), 12 states have call successors, (28) Word has length 87 [2023-04-02 04:35:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:35:53,944 INFO L225 Difference]: With dead ends: 108 [2023-04-02 04:35:53,944 INFO L226 Difference]: Without dead ends: 100 [2023-04-02 04:35:53,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=777, Invalid=8729, Unknown=0, NotChecked=0, Total=9506 [2023-04-02 04:35:53,945 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 151 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 04:35:53,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 187 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 04:35:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-02 04:35:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2023-04-02 04:35:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 10 states have call successors, (10), 5 states have call predecessors, (10), 19 states have return successors, (38), 23 states have call predecessors, (38), 9 states have call successors, (38) [2023-04-02 04:35:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2023-04-02 04:35:53,962 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 87 [2023-04-02 04:35:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:35:53,963 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2023-04-02 04:35:53,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 62 states have (on average 1.3870967741935485) internal successors, (86), 39 states have internal predecessors, (86), 12 states have call successors, (15), 2 states have call predecessors, (15), 20 states have return successors, (28), 27 states have call predecessors, (28), 12 states have call successors, (28) [2023-04-02 04:35:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2023-04-02 04:35:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 04:35:53,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:35:53,964 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:35:53,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-02 04:35:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:54,169 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:35:54,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:35:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2031882754, now seen corresponding path program 18 times [2023-04-02 04:35:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:35:54,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222642341] [2023-04-02 04:35:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:35:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:35:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:35:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:35:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:54,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-04-02 04:35:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:35:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:35:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-02 04:35:55,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:35:55,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222642341] [2023-04-02 04:35:55,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222642341] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:35:55,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653204356] [2023-04-02 04:35:55,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 04:35:55,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:35:55,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:35:55,944 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:35:55,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 04:35:56,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-04-02 04:35:56,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:35:56,064 WARN L260 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-02 04:35:56,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:35:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2023-04-02 04:35:57,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:36:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653204356] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:02,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:36:02,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 65 [2023-04-02 04:36:02,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203451080] [2023-04-02 04:36:02,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:36:02,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-04-02 04:36:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:36:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-04-02 04:36:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=8764, Unknown=0, NotChecked=0, Total=9120 [2023-04-02 04:36:02,103 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 65 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 37 states have internal predecessors, (73), 5 states have call successors, (8), 2 states have call predecessors, (8), 27 states have return successors, (28), 28 states have call predecessors, (28), 5 states have call successors, (28) [2023-04-02 04:36:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:36:04,094 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2023-04-02 04:36:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 04:36:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 37 states have internal predecessors, (73), 5 states have call successors, (8), 2 states have call predecessors, (8), 27 states have return successors, (28), 28 states have call predecessors, (28), 5 states have call successors, (28) Word has length 122 [2023-04-02 04:36:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:36:04,097 INFO L225 Difference]: With dead ends: 100 [2023-04-02 04:36:04,097 INFO L226 Difference]: Without dead ends: 96 [2023-04-02 04:36:04,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1004, Invalid=13758, Unknown=0, NotChecked=0, Total=14762 [2023-04-02 04:36:04,099 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 04:36:04,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 237 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2636 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 04:36:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-02 04:36:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2023-04-02 04:36:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 10 states have call successors, (10), 5 states have call predecessors, (10), 20 states have return successors, (43), 24 states have call predecessors, (43), 9 states have call successors, (43) [2023-04-02 04:36:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2023-04-02 04:36:04,106 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 122 [2023-04-02 04:36:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:36:04,106 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2023-04-02 04:36:04,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 37 states have internal predecessors, (73), 5 states have call successors, (8), 2 states have call predecessors, (8), 27 states have return successors, (28), 28 states have call predecessors, (28), 5 states have call successors, (28) [2023-04-02 04:36:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2023-04-02 04:36:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 04:36:04,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:36:04,107 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:36:04,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-04-02 04:36:04,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:04,311 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:36:04,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:36:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 607003442, now seen corresponding path program 19 times [2023-04-02 04:36:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:36:04,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641633107] [2023-04-02 04:36:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:36:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:36:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:04,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:36:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:04,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:36:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:04,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:04,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:36:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-02 04:36:05,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:36:05,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641633107] [2023-04-02 04:36:05,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641633107] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:05,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233120354] [2023-04-02 04:36:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 04:36:05,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:05,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:36:05,670 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:36:05,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 04:36:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:05,785 WARN L260 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 157 conjunts are in the unsatisfiable core [2023-04-02 04:36:05,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:36:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 238 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 04:36:06,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:36:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-02 04:36:10,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233120354] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:36:10,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:36:10,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 42] total 87 [2023-04-02 04:36:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205355646] [2023-04-02 04:36:10,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:36:10,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-04-02 04:36:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:36:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-04-02 04:36:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=7166, Unknown=0, NotChecked=0, Total=7482 [2023-04-02 04:36:10,655 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 87 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 50 states have internal predecessors, (117), 17 states have call successors, (20), 2 states have call predecessors, (20), 26 states have return successors, (38), 37 states have call predecessors, (38), 17 states have call successors, (38) [2023-04-02 04:36:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:36:13,471 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2023-04-02 04:36:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-02 04:36:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 50 states have internal predecessors, (117), 17 states have call successors, (20), 2 states have call predecessors, (20), 26 states have return successors, (38), 37 states have call predecessors, (38), 17 states have call successors, (38) Word has length 101 [2023-04-02 04:36:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:36:13,472 INFO L225 Difference]: With dead ends: 112 [2023-04-02 04:36:13,472 INFO L226 Difference]: Without dead ends: 106 [2023-04-02 04:36:13,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3165 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1108, Invalid=13898, Unknown=0, NotChecked=0, Total=15006 [2023-04-02 04:36:13,479 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 318 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 3801 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 04:36:13,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 302 Invalid, 3954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3801 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 04:36:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-02 04:36:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2023-04-02 04:36:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 10 states have call successors, (10), 5 states have call predecessors, (10), 21 states have return successors, (41), 25 states have call predecessors, (41), 9 states have call successors, (41) [2023-04-02 04:36:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2023-04-02 04:36:13,494 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 101 [2023-04-02 04:36:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:36:13,494 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2023-04-02 04:36:13,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 50 states have internal predecessors, (117), 17 states have call successors, (20), 2 states have call predecessors, (20), 26 states have return successors, (38), 37 states have call predecessors, (38), 17 states have call successors, (38) [2023-04-02 04:36:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2023-04-02 04:36:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-02 04:36:13,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:36:13,496 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:36:13,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-04-02 04:36:13,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-02 04:36:13,702 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:36:13,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:36:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1872570150, now seen corresponding path program 20 times [2023-04-02 04:36:13,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:36:13,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815322809] [2023-04-02 04:36:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:36:13,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:36:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:36:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:36:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-02 04:36:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-02 04:36:14,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:36:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815322809] [2023-04-02 04:36:14,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815322809] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059852754] [2023-04-02 04:36:14,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:36:14,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:36:14,685 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:36:14,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-02 04:36:14,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:36:14,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:36:14,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 133 conjunts are in the unsatisfiable core [2023-04-02 04:36:14,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:36:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 172 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-04-02 04:36:15,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:36:17,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059852754] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:17,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:36:17,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24] total 51 [2023-04-02 04:36:17,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929114574] [2023-04-02 04:36:17,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:36:17,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 04:36:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:36:17,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 04:36:17,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 04:36:17,815 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 51 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 30 states have internal predecessors, (59), 5 states have call successors, (8), 2 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-02 04:36:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:36:19,235 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2023-04-02 04:36:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 04:36:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 30 states have internal predecessors, (59), 5 states have call successors, (8), 2 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 5 states have call successors, (21) Word has length 87 [2023-04-02 04:36:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:36:19,239 INFO L225 Difference]: With dead ends: 104 [2023-04-02 04:36:19,239 INFO L226 Difference]: Without dead ends: 98 [2023-04-02 04:36:19,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=658, Invalid=7714, Unknown=0, NotChecked=0, Total=8372 [2023-04-02 04:36:19,241 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 04:36:19,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 167 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 04:36:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-02 04:36:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2023-04-02 04:36:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 10 states have call successors, (10), 5 states have call predecessors, (10), 21 states have return successors, (41), 25 states have call predecessors, (41), 9 states have call successors, (41) [2023-04-02 04:36:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2023-04-02 04:36:19,253 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 87 [2023-04-02 04:36:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:36:19,253 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2023-04-02 04:36:19,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 30 states have internal predecessors, (59), 5 states have call successors, (8), 2 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-02 04:36:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2023-04-02 04:36:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 04:36:19,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:36:19,254 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:36:19,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-02 04:36:19,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-02 04:36:19,457 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:36:19,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:36:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1706091632, now seen corresponding path program 21 times [2023-04-02 04:36:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:36:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441774730] [2023-04-02 04:36:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:36:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:36:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:19,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:36:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:19,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:36:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:19,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-04-02 04:36:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:21,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:21,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:21,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:21,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2023-04-02 04:36:21,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:36:21,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441774730] [2023-04-02 04:36:21,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441774730] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:21,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703329378] [2023-04-02 04:36:21,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:36:21,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:36:21,555 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:36:21,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-02 04:36:21,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-04-02 04:36:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:36:21,719 WARN L260 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 205 conjunts are in the unsatisfiable core [2023-04-02 04:36:21,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:36:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 21 proven. 400 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-04-02 04:36:23,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:36:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 60 proven. 691 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-04-02 04:36:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703329378] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:36:29,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:36:29,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 30, 54] total 108 [2023-04-02 04:36:29,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68212803] [2023-04-02 04:36:29,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:36:29,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-04-02 04:36:29,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:36:29,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-04-02 04:36:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=11146, Unknown=0, NotChecked=0, Total=11556 [2023-04-02 04:36:29,093 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 108 states, 104 states have (on average 1.4326923076923077) internal successors, (149), 62 states have internal predecessors, (149), 21 states have call successors, (24), 2 states have call predecessors, (24), 34 states have return successors, (47), 46 states have call predecessors, (47), 21 states have call successors, (47) [2023-04-02 04:36:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:36:32,294 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2023-04-02 04:36:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-02 04:36:32,295 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 104 states have (on average 1.4326923076923077) internal successors, (149), 62 states have internal predecessors, (149), 21 states have call successors, (24), 2 states have call predecessors, (24), 34 states have return successors, (47), 46 states have call predecessors, (47), 21 states have call successors, (47) Word has length 129 [2023-04-02 04:36:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:36:32,296 INFO L225 Difference]: With dead ends: 118 [2023-04-02 04:36:32,296 INFO L226 Difference]: Without dead ends: 112 [2023-04-02 04:36:32,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 213 SyntacticMatches, 16 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4807 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1385, Invalid=19785, Unknown=0, NotChecked=0, Total=21170 [2023-04-02 04:36:32,297 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 437 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 4602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 04:36:32,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 282 Invalid, 4602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 04:36:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-04-02 04:36:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2023-04-02 04:36:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 10 states have call successors, (10), 5 states have call predecessors, (10), 23 states have return successors, (44), 27 states have call predecessors, (44), 9 states have call successors, (44) [2023-04-02 04:36:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-04-02 04:36:32,304 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 129 [2023-04-02 04:36:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:36:32,305 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-04-02 04:36:32,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 104 states have (on average 1.4326923076923077) internal successors, (149), 62 states have internal predecessors, (149), 21 states have call successors, (24), 2 states have call predecessors, (24), 34 states have return successors, (47), 46 states have call predecessors, (47), 21 states have call successors, (47) [2023-04-02 04:36:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-04-02 04:36:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 04:36:32,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:36:32,306 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:36:32,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-04-02 04:36:32,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:32,512 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:36:32,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:36:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash -14879064, now seen corresponding path program 22 times [2023-04-02 04:36:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:36:32,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068573096] [2023-04-02 04:36:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:36:32,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:36:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:36:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:32,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:36:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:32,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:32,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-04-02 04:36:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 294 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2023-04-02 04:36:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:36:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068573096] [2023-04-02 04:36:33,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068573096] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743971269] [2023-04-02 04:36:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:36:33,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:36:33,897 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:36:33,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-04-02 04:36:34,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:36:34,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:36:34,041 WARN L260 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 169 conjunts are in the unsatisfiable core [2023-04-02 04:36:34,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:36:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 4 proven. 278 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-02 04:36:35,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:36:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 14 proven. 454 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-04-02 04:36:38,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743971269] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:36:38,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:36:38,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26, 33] total 80 [2023-04-02 04:36:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218720313] [2023-04-02 04:36:38,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:36:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-04-02 04:36:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:36:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-04-02 04:36:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=6029, Unknown=0, NotChecked=0, Total=6320 [2023-04-02 04:36:38,334 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 80 states, 76 states have (on average 1.368421052631579) internal successors, (104), 46 states have internal predecessors, (104), 14 states have call successors, (17), 2 states have call predecessors, (17), 25 states have return successors, (35), 34 states have call predecessors, (35), 14 states have call successors, (35) [2023-04-02 04:36:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:36:40,589 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2023-04-02 04:36:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-02 04:36:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.368421052631579) internal successors, (104), 46 states have internal predecessors, (104), 14 states have call successors, (17), 2 states have call predecessors, (17), 25 states have return successors, (35), 34 states have call predecessors, (35), 14 states have call successors, (35) Word has length 108 [2023-04-02 04:36:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:36:40,591 INFO L225 Difference]: With dead ends: 120 [2023-04-02 04:36:40,591 INFO L226 Difference]: Without dead ends: 112 [2023-04-02 04:36:40,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=979, Invalid=12361, Unknown=0, NotChecked=0, Total=13340 [2023-04-02 04:36:40,592 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 128 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 04:36:40,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 172 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 04:36:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-04-02 04:36:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2023-04-02 04:36:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 10 states have call successors, (10), 5 states have call predecessors, (10), 23 states have return successors, (43), 27 states have call predecessors, (43), 9 states have call successors, (43) [2023-04-02 04:36:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2023-04-02 04:36:40,602 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 108 [2023-04-02 04:36:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:36:40,602 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2023-04-02 04:36:40,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.368421052631579) internal successors, (104), 46 states have internal predecessors, (104), 14 states have call successors, (17), 2 states have call predecessors, (17), 25 states have return successors, (35), 34 states have call predecessors, (35), 14 states have call successors, (35) [2023-04-02 04:36:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2023-04-02 04:36:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-02 04:36:40,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:36:40,603 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:36:40,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-04-02 04:36:40,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:40,809 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:36:40,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:36:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash 715197892, now seen corresponding path program 23 times [2023-04-02 04:36:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:36:40,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473668497] [2023-04-02 04:36:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:36:40,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:36:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:36:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:36:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:36:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:41,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-04-02 04:36:42,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:36:42,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473668497] [2023-04-02 04:36:42,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473668497] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:42,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761890738] [2023-04-02 04:36:42,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:36:42,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:42,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:36:42,718 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:36:42,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-04-02 04:36:42,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-04-02 04:36:42,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:36:42,883 WARN L260 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 181 conjunts are in the unsatisfiable core [2023-04-02 04:36:42,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:36:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 23 proven. 310 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-04-02 04:36:44,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:36:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-02 04:36:49,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761890738] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:36:49,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:36:49,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 32, 48] total 99 [2023-04-02 04:36:49,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653204527] [2023-04-02 04:36:49,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:36:49,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-04-02 04:36:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:36:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-04-02 04:36:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=9342, Unknown=0, NotChecked=0, Total=9702 [2023-04-02 04:36:49,150 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 99 states, 95 states have (on average 1.431578947368421) internal successors, (136), 56 states have internal predecessors, (136), 19 states have call successors, (22), 2 states have call predecessors, (22), 30 states have return successors, (44), 43 states have call predecessors, (44), 19 states have call successors, (44) [2023-04-02 04:36:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:36:52,298 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2023-04-02 04:36:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-04-02 04:36:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 95 states have (on average 1.431578947368421) internal successors, (136), 56 states have internal predecessors, (136), 19 states have call successors, (22), 2 states have call predecessors, (22), 30 states have return successors, (44), 43 states have call predecessors, (44), 19 states have call successors, (44) Word has length 115 [2023-04-02 04:36:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:36:52,299 INFO L225 Difference]: With dead ends: 124 [2023-04-02 04:36:52,299 INFO L226 Difference]: Without dead ends: 118 [2023-04-02 04:36:52,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 185 SyntacticMatches, 17 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4551 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1330, Invalid=17852, Unknown=0, NotChecked=0, Total=19182 [2023-04-02 04:36:52,301 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 104 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4410 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 4464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 04:36:52,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 322 Invalid, 4464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4410 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 04:36:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-04-02 04:36:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2023-04-02 04:36:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 10 states have call successors, (10), 5 states have call predecessors, (10), 25 states have return successors, (46), 29 states have call predecessors, (46), 9 states have call successors, (46) [2023-04-02 04:36:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-04-02 04:36:52,308 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 115 [2023-04-02 04:36:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:36:52,309 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-04-02 04:36:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 95 states have (on average 1.431578947368421) internal successors, (136), 56 states have internal predecessors, (136), 19 states have call successors, (22), 2 states have call predecessors, (22), 30 states have return successors, (44), 43 states have call predecessors, (44), 19 states have call successors, (44) [2023-04-02 04:36:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-04-02 04:36:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 04:36:52,309 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:36:52,309 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:36:52,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-04-02 04:36:52,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-02 04:36:52,510 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:36:52,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:36:52,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2083917676, now seen corresponding path program 24 times [2023-04-02 04:36:52,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:36:52,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57537275] [2023-04-02 04:36:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:36:52,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:36:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:36:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:52,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:36:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-02 04:36:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:36:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:36:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 253 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-04-02 04:36:53,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:36:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57537275] [2023-04-02 04:36:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57537275] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509584994] [2023-04-02 04:36:53,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 04:36:53,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:36:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:36:53,975 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:36:53,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-04-02 04:36:54,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-04-02 04:36:54,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:36:54,144 WARN L260 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 157 conjunts are in the unsatisfiable core [2023-04-02 04:36:54,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:36:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 245 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 04:36:55,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:36:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509584994] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:36:57,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:36:57,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28] total 59 [2023-04-02 04:36:57,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898273821] [2023-04-02 04:36:57,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:36:57,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-04-02 04:36:57,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:36:57,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-04-02 04:36:57,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2023-04-02 04:36:57,808 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 59 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 34 states have internal predecessors, (67), 5 states have call successors, (8), 2 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-02 04:36:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:36:59,473 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2023-04-02 04:36:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 04:36:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 34 states have internal predecessors, (67), 5 states have call successors, (8), 2 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) Word has length 101 [2023-04-02 04:36:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:36:59,474 INFO L225 Difference]: With dead ends: 114 [2023-04-02 04:36:59,474 INFO L226 Difference]: Without dead ends: 110 [2023-04-02 04:36:59,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=752, Invalid=9550, Unknown=0, NotChecked=0, Total=10302 [2023-04-02 04:36:59,475 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 82 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 04:36:59,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 192 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 04:36:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-02 04:36:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-04-02 04:36:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 10 states have call successors, (10), 5 states have call predecessors, (10), 25 states have return successors, (46), 29 states have call predecessors, (46), 9 states have call successors, (46) [2023-04-02 04:36:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2023-04-02 04:36:59,483 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 101 [2023-04-02 04:36:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:36:59,483 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2023-04-02 04:36:59,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 34 states have internal predecessors, (67), 5 states have call successors, (8), 2 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-02 04:36:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2023-04-02 04:36:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 04:36:59,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:36:59,484 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:36:59,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-04-02 04:36:59,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-04-02 04:36:59,690 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:36:59,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:36:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1716893516, now seen corresponding path program 25 times [2023-04-02 04:36:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:36:59,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569299050] [2023-04-02 04:36:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:36:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:36:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:37:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:37:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:00,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-02 04:37:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:01,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:01,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:01,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:01,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:01,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:01,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 72 proven. 663 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2023-04-02 04:37:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:37:02,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569299050] [2023-04-02 04:37:02,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569299050] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:37:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038963578] [2023-04-02 04:37:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 04:37:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:37:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:37:02,697 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:37:02,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-04-02 04:37:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:02,880 WARN L260 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 253 conjunts are in the unsatisfiable core [2023-04-02 04:37:02,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:37:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 12 proven. 632 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2023-04-02 04:37:04,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:37:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038963578] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:37:11,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 04:37:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 34] total 81 [2023-04-02 04:37:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665978766] [2023-04-02 04:37:11,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 04:37:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-04-02 04:37:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:37:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-04-02 04:37:11,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=13368, Unknown=0, NotChecked=0, Total=13806 [2023-04-02 04:37:11,934 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 81 states, 78 states have (on average 1.141025641025641) internal successors, (89), 45 states have internal predecessors, (89), 5 states have call successors, (8), 2 states have call predecessors, (8), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 04:37:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:37:14,949 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2023-04-02 04:37:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 04:37:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 78 states have (on average 1.141025641025641) internal successors, (89), 45 states have internal predecessors, (89), 5 states have call successors, (8), 2 states have call predecessors, (8), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) Word has length 157 [2023-04-02 04:37:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:37:14,954 INFO L225 Difference]: With dead ends: 120 [2023-04-02 04:37:14,954 INFO L226 Difference]: Without dead ends: 116 [2023-04-02 04:37:14,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4103 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1345, Invalid=21005, Unknown=0, NotChecked=0, Total=22350 [2023-04-02 04:37:14,956 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 153 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 04:37:14,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 282 Invalid, 4090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 4017 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 04:37:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-04-02 04:37:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2023-04-02 04:37:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 11 states have call successors, (11), 5 states have call predecessors, (11), 26 states have return successors, (53), 31 states have call predecessors, (53), 10 states have call successors, (53) [2023-04-02 04:37:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2023-04-02 04:37:14,968 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 157 [2023-04-02 04:37:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:37:14,968 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2023-04-02 04:37:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 78 states have (on average 1.141025641025641) internal successors, (89), 45 states have internal predecessors, (89), 5 states have call successors, (8), 2 states have call predecessors, (8), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) [2023-04-02 04:37:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2023-04-02 04:37:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 04:37:14,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:37:14,969 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:37:14,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-04-02 04:37:15,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-04-02 04:37:15,175 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:37:15,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:37:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1634758826, now seen corresponding path program 26 times [2023-04-02 04:37:15,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:37:15,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777068308] [2023-04-02 04:37:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:37:15,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:37:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:37:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:15,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:37:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:15,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:15,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:37:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:16,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:17,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:17,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:17,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-02 04:37:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:37:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777068308] [2023-04-02 04:37:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777068308] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:37:17,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973090126] [2023-04-02 04:37:17,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 04:37:17,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:37:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:37:17,317 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:37:17,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-04-02 04:37:17,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 04:37:17,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:37:17,505 WARN L260 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-02 04:37:17,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:37:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-04-02 04:37:19,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:37:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 47 proven. 611 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-02 04:37:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973090126] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:37:24,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:37:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 34, 51] total 105 [2023-04-02 04:37:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338523815] [2023-04-02 04:37:24,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:37:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-04-02 04:37:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:37:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-04-02 04:37:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=10538, Unknown=0, NotChecked=0, Total=10920 [2023-04-02 04:37:24,508 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand has 105 states, 101 states have (on average 1.396039603960396) internal successors, (141), 59 states have internal predecessors, (141), 20 states have call successors, (23), 2 states have call predecessors, (23), 32 states have return successors, (47), 46 states have call predecessors, (47), 20 states have call successors, (47) [2023-04-02 04:37:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:37:28,413 INFO L93 Difference]: Finished difference Result 132 states and 165 transitions. [2023-04-02 04:37:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-02 04:37:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 101 states have (on average 1.396039603960396) internal successors, (141), 59 states have internal predecessors, (141), 20 states have call successors, (23), 2 states have call predecessors, (23), 32 states have return successors, (47), 46 states have call predecessors, (47), 20 states have call successors, (47) Word has length 122 [2023-04-02 04:37:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:37:28,414 INFO L225 Difference]: With dead ends: 132 [2023-04-02 04:37:28,414 INFO L226 Difference]: Without dead ends: 126 [2023-04-02 04:37:28,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1447, Invalid=20015, Unknown=0, NotChecked=0, Total=21462 [2023-04-02 04:37:28,420 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 230 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 5629 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 04:37:28,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 382 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5629 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 04:37:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-02 04:37:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 110. [2023-04-02 04:37:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 10 states have call successors, (10), 5 states have call predecessors, (10), 27 states have return successors, (49), 31 states have call predecessors, (49), 9 states have call successors, (49) [2023-04-02 04:37:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2023-04-02 04:37:28,429 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 122 [2023-04-02 04:37:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:37:28,429 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2023-04-02 04:37:28,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 101 states have (on average 1.396039603960396) internal successors, (141), 59 states have internal predecessors, (141), 20 states have call successors, (23), 2 states have call predecessors, (23), 32 states have return successors, (47), 46 states have call predecessors, (47), 20 states have call successors, (47) [2023-04-02 04:37:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2023-04-02 04:37:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 04:37:28,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:37:28,430 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:37:28,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-04-02 04:37:28,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-04-02 04:37:28,633 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:37:28,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:37:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1217557172, now seen corresponding path program 27 times [2023-04-02 04:37:28,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:37:28,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037254361] [2023-04-02 04:37:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:37:28,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:37:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:28,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:37:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:28,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:37:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:29,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:30,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:30,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-02 04:37:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:30,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 294 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2023-04-02 04:37:30,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:37:30,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037254361] [2023-04-02 04:37:30,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037254361] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:37:30,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665893556] [2023-04-02 04:37:30,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 04:37:30,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:37:30,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:37:30,282 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:37:30,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-04-02 04:37:30,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-04-02 04:37:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:37:30,489 WARN L260 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 169 conjunts are in the unsatisfiable core [2023-04-02 04:37:30,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:37:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-04-02 04:37:31,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:37:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 473 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-04-02 04:37:35,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665893556] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:37:35,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:37:35,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 30, 39] total 88 [2023-04-02 04:37:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152467604] [2023-04-02 04:37:35,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:37:35,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-04-02 04:37:35,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:37:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-04-02 04:37:35,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=7329, Unknown=0, NotChecked=0, Total=7656 [2023-04-02 04:37:35,603 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 88 states, 84 states have (on average 1.4166666666666667) internal successors, (119), 50 states have internal predecessors, (119), 16 states have call successors, (19), 2 states have call predecessors, (19), 27 states have return successors, (39), 38 states have call predecessors, (39), 16 states have call successors, (39) [2023-04-02 04:37:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:37:38,387 INFO L93 Difference]: Finished difference Result 126 states and 165 transitions. [2023-04-02 04:37:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-02 04:37:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 84 states have (on average 1.4166666666666667) internal successors, (119), 50 states have internal predecessors, (119), 16 states have call successors, (19), 2 states have call predecessors, (19), 27 states have return successors, (39), 38 states have call predecessors, (39), 16 states have call successors, (39) Word has length 108 [2023-04-02 04:37:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:37:38,389 INFO L225 Difference]: With dead ends: 126 [2023-04-02 04:37:38,389 INFO L226 Difference]: Without dead ends: 120 [2023-04-02 04:37:38,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 183 SyntacticMatches, 12 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3723 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1140, Invalid=14360, Unknown=0, NotChecked=0, Total=15500 [2023-04-02 04:37:38,391 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 140 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 04:37:38,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 257 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 04:37:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-02 04:37:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2023-04-02 04:37:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 9 states have call successors, (9), 5 states have call predecessors, (9), 27 states have return successors, (47), 30 states have call predecessors, (47), 8 states have call successors, (47) [2023-04-02 04:37:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2023-04-02 04:37:38,400 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 108 [2023-04-02 04:37:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:37:38,400 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2023-04-02 04:37:38,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 84 states have (on average 1.4166666666666667) internal successors, (119), 50 states have internal predecessors, (119), 16 states have call successors, (19), 2 states have call predecessors, (19), 27 states have return successors, (39), 38 states have call predecessors, (39), 16 states have call successors, (39) [2023-04-02 04:37:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2023-04-02 04:37:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 04:37:38,401 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:37:38,401 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:37:38,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-04-02 04:37:38,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:37:38,616 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:37:38,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:37:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 936366934, now seen corresponding path program 28 times [2023-04-02 04:37:38,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:37:38,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059212162] [2023-04-02 04:37:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:37:38,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:37:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:38,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:37:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:38,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:37:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:38,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:39,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:37:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:39,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:39,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:39,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:39,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:40,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:41,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2023-04-02 04:37:41,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:37:41,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059212162] [2023-04-02 04:37:41,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059212162] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:37:41,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447420953] [2023-04-02 04:37:41,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 04:37:41,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:37:41,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:37:41,118 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:37:41,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-04-02 04:37:41,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 04:37:41,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:37:41,320 WARN L260 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 205 conjunts are in the unsatisfiable core [2023-04-02 04:37:41,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:37:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 13 proven. 416 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2023-04-02 04:37:42,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:37:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 50 proven. 700 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-02 04:37:49,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447420953] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:37:49,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:37:49,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 36, 54] total 111 [2023-04-02 04:37:49,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138314381] [2023-04-02 04:37:49,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:37:49,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-04-02 04:37:49,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:37:49,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-04-02 04:37:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=11806, Unknown=0, NotChecked=0, Total=12210 [2023-04-02 04:37:49,067 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 111 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 62 states have internal predecessors, (149), 21 states have call successors, (24), 2 states have call predecessors, (24), 34 states have return successors, (50), 49 states have call predecessors, (50), 21 states have call successors, (50) [2023-04-02 04:37:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 04:37:52,706 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2023-04-02 04:37:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-02 04:37:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 62 states have internal predecessors, (149), 21 states have call successors, (24), 2 states have call predecessors, (24), 34 states have return successors, (50), 49 states have call predecessors, (50), 21 states have call successors, (50) Word has length 129 [2023-04-02 04:37:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 04:37:52,710 INFO L225 Difference]: With dead ends: 130 [2023-04-02 04:37:52,710 INFO L226 Difference]: Without dead ends: 124 [2023-04-02 04:37:52,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 222 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4979 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1561, Invalid=22001, Unknown=0, NotChecked=0, Total=23562 [2023-04-02 04:37:52,712 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 145 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4592 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 4666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 4592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 04:37:52,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 302 Invalid, 4666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 4592 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 04:37:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-02 04:37:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2023-04-02 04:37:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.04) internal successors, (78), 76 states have internal predecessors, (78), 9 states have call successors, (9), 5 states have call predecessors, (9), 29 states have return successors, (50), 32 states have call predecessors, (50), 8 states have call successors, (50) [2023-04-02 04:37:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2023-04-02 04:37:52,720 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 129 [2023-04-02 04:37:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 04:37:52,720 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2023-04-02 04:37:52,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 62 states have internal predecessors, (149), 21 states have call successors, (24), 2 states have call predecessors, (24), 34 states have return successors, (50), 49 states have call predecessors, (50), 21 states have call successors, (50) [2023-04-02 04:37:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2023-04-02 04:37:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 04:37:52,721 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 04:37:52,721 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 04:37:52,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-04-02 04:37:52,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:37:52,927 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 04:37:52,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 04:37:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2066639256, now seen corresponding path program 29 times [2023-04-02 04:37:52,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 04:37:52,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500759627] [2023-04-02 04:37:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 04:37:52,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 04:37:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:53,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 04:37:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 04:37:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:53,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:53,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:53,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 04:37:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:53,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:54,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:54,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:54,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-04-02 04:37:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 04:37:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-04-02 04:37:55,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 04:37:55,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500759627] [2023-04-02 04:37:55,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500759627] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 04:37:55,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056123911] [2023-04-02 04:37:55,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 04:37:55,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 04:37:55,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 04:37:55,884 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 04:37:55,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-04-02 04:37:56,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-04-02 04:37:56,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 04:37:56,115 WARN L260 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 217 conjunts are in the unsatisfiable core [2023-04-02 04:37:56,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 04:37:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 29 proven. 454 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2023-04-02 04:37:57,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 04:38:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 54 proven. 795 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-04-02 04:38:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056123911] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 04:38:04,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 04:38:04,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 38, 57] total 117 [2023-04-02 04:38:04,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534561245] [2023-04-02 04:38:04,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 04:38:04,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-04-02 04:38:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 04:38:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-04-02 04:38:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=13146, Unknown=0, NotChecked=0, Total=13572 [2023-04-02 04:38:04,933 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 117 states, 113 states have (on average 1.415929203539823) internal successors, (160), 65 states have internal predecessors, (160), 22 states have call successors, (25), 2 states have call predecessors, (25), 36 states have return successors, (53), 52 states have call predecessors, (53), 22 states have call successors, (53)