/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/array-tiling/pnr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:55:50,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:55:50,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:55:50,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:55:50,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:55:50,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:55:50,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:55:50,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:55:50,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:55:50,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:55:50,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:55:50,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:55:50,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:55:50,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:55:50,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:55:50,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:55:50,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:55:50,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:55:50,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:55:50,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:55:50,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:55:50,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:55:50,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:55:50,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:55:50,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:55:50,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:55:50,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:55:50,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:55:50,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:55:50,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:55:50,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:55:50,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:55:50,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:55:50,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:55:50,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:55:50,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:55:50,794 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 [2023-04-01 18:55:50,822 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:55:50,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:55:50,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:55:50,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:55:50,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:55:50,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:55:50,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:55:50,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:55:50,826 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:55:50,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:55:50,827 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:55:50,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:55:50,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:55:50,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:55:50,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:55:50,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:55:50,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:55:50,828 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:55:50,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:55:50,829 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:55:50,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:55:50,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:55:50,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:55:50,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:55:50,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:55:50,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:55:50,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:55:50,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:55:50,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:55:50,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:55:50,830 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:55:50,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:55:50,831 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:55:50,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:55:50,831 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:55:50,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:55:51,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:55:51,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:55:51,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:55:51,064 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:55:51,064 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:55:51,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2023-04-01 18:55:52,256 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:55:52,426 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:55:52,426 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2023-04-01 18:55:52,430 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1c49f45/352872a6f3fb4a0187ca50f19df5d1cf/FLAGbd79a66b1 [2023-04-01 18:55:52,441 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1c49f45/352872a6f3fb4a0187ca50f19df5d1cf [2023-04-01 18:55:52,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:55:52,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:55:52,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:55:52,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:55:52,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:55:52,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775dc7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52, skipping insertion in model container [2023-04-01 18:55:52,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:55:52,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:55:52,592 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/array-tiling/pnr2.c[395,408] [2023-04-01 18:55:52,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:55:52,636 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:55:52,644 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/array-tiling/pnr2.c[395,408] [2023-04-01 18:55:52,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:55:52,666 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:55:52,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52 WrapperNode [2023-04-01 18:55:52,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:55:52,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:55:52,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:55:52,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:55:52,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,701 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:55:52,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:55:52,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:55:52,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:55:52,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (1/1) ... [2023-04-01 18:55:52,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:55:52,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:52,730 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) [2023-04-01 18:55:52,731 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 [2023-04-01 18:55:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:55:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:55:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:55:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:55:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:55:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-04-01 18:55:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:55:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:55:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 18:55:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:55:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:55:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:55:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:55:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:55:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:55:52,823 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:55:52,825 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:55:53,051 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:55:53,057 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:55:53,057 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 18:55:53,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:55:53 BoogieIcfgContainer [2023-04-01 18:55:53,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:55:53,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:55:53,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:55:53,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:55:53,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:55:52" (1/3) ... [2023-04-01 18:55:53,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c3f264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:55:53, skipping insertion in model container [2023-04-01 18:55:53,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:55:52" (2/3) ... [2023-04-01 18:55:53,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c3f264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:55:53, skipping insertion in model container [2023-04-01 18:55:53,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:55:53" (3/3) ... [2023-04-01 18:55:53,082 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr2.c [2023-04-01 18:55:53,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:55:53,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:55:53,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:55:53,192 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;@37a9cc98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:55:53,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:55:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 18:55:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:55:53,204 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:53,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:53,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:53,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:53,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1325016026, now seen corresponding path program 1 times [2023-04-01 18:55:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:53,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126024767] [2023-04-01 18:55:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:53,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:53,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126024767] [2023-04-01 18:55:53,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126024767] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:53,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:53,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:55:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713285397] [2023-04-01 18:55:53,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:53,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:55:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:55:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:55:53,508 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:53,652 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2023-04-01 18:55:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:55:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 18:55:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:53,667 INFO L225 Difference]: With dead ends: 71 [2023-04-01 18:55:53,667 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 18:55:53,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:55:53,675 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:53,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 40 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 18:55:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 18:55:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:55:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-04-01 18:55:53,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2023-04-01 18:55:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:53,713 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-04-01 18:55:53,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:55:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-04-01 18:55:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:55:53,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:53,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:55:53,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:53,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2026080604, now seen corresponding path program 1 times [2023-04-01 18:55:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:53,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048076573] [2023-04-01 18:55:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:53,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:54,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048076573] [2023-04-01 18:55:54,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048076573] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:55:54,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:55:54,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:55:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436287573] [2023-04-01 18:55:54,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:55:54,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:55:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:55:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:55:54,139 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:54,284 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-04-01 18:55:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:55:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 18:55:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:54,288 INFO L225 Difference]: With dead ends: 55 [2023-04-01 18:55:54,289 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 18:55:54,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:55:54,299 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:54,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 33 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:55:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 18:55:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-04-01 18:55:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:55:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-04-01 18:55:54,315 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2023-04-01 18:55:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:54,315 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-04-01 18:55:54,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:55:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-04-01 18:55:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 18:55:54,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:54,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:55:54,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:54,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1428453585, now seen corresponding path program 1 times [2023-04-01 18:55:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062624995] [2023-04-01 18:55:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:55:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:55:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:55:54,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062624995] [2023-04-01 18:55:54,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062624995] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520572190] [2023-04-01 18:55:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:54,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:54,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:54,804 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) [2023-04-01 18:55:54,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:55:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:54,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 18:55:54,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:54,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:55:55,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:55:55,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 18:55:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:55:55,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:55,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-04-01 18:55:55,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-04-01 18:55:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:55:55,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520572190] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:55,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:55,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 16 [2023-04-01 18:55:55,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230154720] [2023-04-01 18:55:55,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:55,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 18:55:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 18:55:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-04-01 18:55:55,230 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:55:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:55:55,624 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2023-04-01 18:55:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 18:55:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2023-04-01 18:55:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:55:55,626 INFO L225 Difference]: With dead ends: 77 [2023-04-01 18:55:55,626 INFO L226 Difference]: Without dead ends: 75 [2023-04-01 18:55:55,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-04-01 18:55:55,628 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:55:55,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 241 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:55:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-01 18:55:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2023-04-01 18:55:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 18:55:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2023-04-01 18:55:55,640 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 35 [2023-04-01 18:55:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:55:55,641 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2023-04-01 18:55:55,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:55:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2023-04-01 18:55:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 18:55:55,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:55:55,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:55:55,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:55:55,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:55,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:55:55,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:55:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash 148589907, now seen corresponding path program 1 times [2023-04-01 18:55:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:55:55,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512070005] [2023-04-01 18:55:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:55:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:55:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:56,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:55:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:56,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:55:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:56,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:55:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:55:56,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:55:56,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512070005] [2023-04-01 18:55:56,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512070005] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:55:56,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174242397] [2023-04-01 18:55:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:55:56,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:55:56,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:55:56,185 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) [2023-04-01 18:55:56,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:55:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:55:56,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 18:55:56,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:55:56,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:55:56,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:55:56,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:55:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:55:56,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:55:56,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-04-01 18:55:56,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 18:55:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:55:57,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174242397] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:55:57,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:55:57,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 12] total 32 [2023-04-01 18:55:57,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400252173] [2023-04-01 18:55:57,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:55:57,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 18:55:57,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:55:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 18:55:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2023-04-01 18:55:57,088 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 32 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 12 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:56:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:01,015 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2023-04-01 18:56:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 18:56:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 12 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 35 [2023-04-01 18:56:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:01,020 INFO L225 Difference]: With dead ends: 113 [2023-04-01 18:56:01,020 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 18:56:01,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=491, Invalid=2701, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 18:56:01,022 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 260 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 120 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:01,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 216 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 903 Invalid, 5 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 18:56:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 18:56:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 43. [2023-04-01 18:56:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 18:56:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-04-01 18:56:01,046 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2023-04-01 18:56:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:01,047 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-04-01 18:56:01,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 12 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:56:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-04-01 18:56:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 18:56:01,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:01,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:01,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:01,250 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 [2023-04-01 18:56:01,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:01,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1179366970, now seen corresponding path program 1 times [2023-04-01 18:56:01,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:01,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482073112] [2023-04-01 18:56:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:01,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:56:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482073112] [2023-04-01 18:56:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482073112] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153115132] [2023-04-01 18:56:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:01,597 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) [2023-04-01 18:56:01,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:56:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:01,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 18:56:01,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:01,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:01,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 18:56:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:01,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:01,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:01,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:56:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153115132] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:01,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:01,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 17 [2023-04-01 18:56:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61249870] [2023-04-01 18:56:01,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:01,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 18:56:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 18:56:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-04-01 18:56:01,848 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 18:56:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:02,181 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2023-04-01 18:56:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 18:56:02,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2023-04-01 18:56:02,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:02,183 INFO L225 Difference]: With dead ends: 78 [2023-04-01 18:56:02,183 INFO L226 Difference]: Without dead ends: 76 [2023-04-01 18:56:02,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-04-01 18:56:02,184 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:02,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 237 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:56:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-01 18:56:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2023-04-01 18:56:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 46 states have internal predecessors, (51), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:56:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2023-04-01 18:56:02,205 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 43 [2023-04-01 18:56:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:02,207 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2023-04-01 18:56:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 18:56:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2023-04-01 18:56:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 18:56:02,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:02,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:02,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:02,419 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 [2023-04-01 18:56:02,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:02,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash -408980932, now seen corresponding path program 1 times [2023-04-01 18:56:02,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:02,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861438332] [2023-04-01 18:56:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:02,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:56:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861438332] [2023-04-01 18:56:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861438332] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410385370] [2023-04-01 18:56:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:02,757 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) [2023-04-01 18:56:02,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:56:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:02,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 18:56:02,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:02,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:03,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:03,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:03,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:03,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 18:56:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:56:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410385370] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:03,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:03,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-04-01 18:56:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116981167] [2023-04-01 18:56:03,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 18:56:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 18:56:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-04-01 18:56:03,300 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-01 18:56:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:04,207 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2023-04-01 18:56:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 18:56:04,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 43 [2023-04-01 18:56:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:04,209 INFO L225 Difference]: With dead ends: 120 [2023-04-01 18:56:04,209 INFO L226 Difference]: Without dead ends: 118 [2023-04-01 18:56:04,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 18:56:04,211 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 107 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:04,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 340 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:56:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-04-01 18:56:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 51. [2023-04-01 18:56:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 18:56:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-04-01 18:56:04,223 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 43 [2023-04-01 18:56:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:04,224 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-04-01 18:56:04,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-01 18:56:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-04-01 18:56:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 18:56:04,225 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:04,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:04,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:04,430 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 [2023-04-01 18:56:04,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:04,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1056406179, now seen corresponding path program 2 times [2023-04-01 18:56:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:04,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380790422] [2023-04-01 18:56:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:04,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 18:56:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 18:56:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:56:04,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:04,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380790422] [2023-04-01 18:56:04,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380790422] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375409225] [2023-04-01 18:56:04,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:56:04,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:04,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:04,718 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) [2023-04-01 18:56:04,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:56:04,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:56:04,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:04,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 18:56:04,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:56:05,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:56:05,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375409225] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:05,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:05,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2023-04-01 18:56:05,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192195529] [2023-04-01 18:56:05,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:05,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 18:56:05,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 18:56:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2023-04-01 18:56:05,238 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 14 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-04-01 18:56:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:05,639 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2023-04-01 18:56:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 18:56:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 14 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) Word has length 51 [2023-04-01 18:56:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:05,641 INFO L225 Difference]: With dead ends: 96 [2023-04-01 18:56:05,641 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 18:56:05,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 18:56:05,642 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 124 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:05,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 77 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:56:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 18:56:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-04-01 18:56:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 18:56:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-04-01 18:56:05,655 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 51 [2023-04-01 18:56:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:05,657 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-04-01 18:56:05,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 14 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-04-01 18:56:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-04-01 18:56:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:56:05,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:05,659 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:05,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:05,865 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 [2023-04-01 18:56:05,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:05,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 347058008, now seen corresponding path program 3 times [2023-04-01 18:56:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:05,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760504244] [2023-04-01 18:56:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:05,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:56:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:56:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:06,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760504244] [2023-04-01 18:56:06,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760504244] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:06,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641222585] [2023-04-01 18:56:06,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:56:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:06,237 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) [2023-04-01 18:56:06,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:56:06,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:56:06,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:06,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 18:56:06,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:06,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:06,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-04-01 18:56:06,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 18:56:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:56:06,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:06,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:06,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:56:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:56:06,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641222585] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:06,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:06,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 23 [2023-04-01 18:56:06,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870419750] [2023-04-01 18:56:06,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:06,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 18:56:06,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 18:56:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-04-01 18:56:06,644 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 15 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-04-01 18:56:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:07,126 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2023-04-01 18:56:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 18:56:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 15 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) Word has length 65 [2023-04-01 18:56:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:07,128 INFO L225 Difference]: With dead ends: 122 [2023-04-01 18:56:07,128 INFO L226 Difference]: Without dead ends: 120 [2023-04-01 18:56:07,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2023-04-01 18:56:07,129 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 88 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:07,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 299 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:56:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-01 18:56:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 82. [2023-04-01 18:56:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 18:56:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2023-04-01 18:56:07,163 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 65 [2023-04-01 18:56:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:07,164 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2023-04-01 18:56:07,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 15 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2023-04-01 18:56:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2023-04-01 18:56:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:56:07,165 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:07,165 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:07,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:07,365 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 [2023-04-01 18:56:07,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:07,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1048657882, now seen corresponding path program 1 times [2023-04-01 18:56:07,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:07,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287788230] [2023-04-01 18:56:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:07,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:56:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:56:07,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287788230] [2023-04-01 18:56:07,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287788230] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254682966] [2023-04-01 18:56:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:07,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:07,720 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) [2023-04-01 18:56:07,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:56:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:07,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 18:56:07,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:08,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:08,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:56:08,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:56:08,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:08,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:08,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 18:56:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:56:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254682966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:08,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:08,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 15] total 40 [2023-04-01 18:56:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117063724] [2023-04-01 18:56:08,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 18:56:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 18:56:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 18:56:08,887 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 34 states have internal predecessors, (100), 21 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) [2023-04-01 18:56:12,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:17,333 INFO L93 Difference]: Finished difference Result 194 states and 242 transitions. [2023-04-01 18:56:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-01 18:56:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 34 states have internal predecessors, (100), 21 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) Word has length 65 [2023-04-01 18:56:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:17,335 INFO L225 Difference]: With dead ends: 194 [2023-04-01 18:56:17,335 INFO L226 Difference]: Without dead ends: 192 [2023-04-01 18:56:17,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 117 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=778, Invalid=4624, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 18:56:17,337 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 482 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 250 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:17,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 369 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1259 Invalid, 11 Unknown, 0 Unchecked, 7.4s Time] [2023-04-01 18:56:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-04-01 18:56:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 79. [2023-04-01 18:56:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 18:56:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2023-04-01 18:56:17,359 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 65 [2023-04-01 18:56:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:17,359 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2023-04-01 18:56:17,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 34 states have internal predecessors, (100), 21 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) [2023-04-01 18:56:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2023-04-01 18:56:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 18:56:17,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:17,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:17,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 18:56:17,561 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 [2023-04-01 18:56:17,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:17,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:17,562 INFO L85 PathProgramCache]: Analyzing trace with hash -363366975, now seen corresponding path program 4 times [2023-04-01 18:56:17,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:17,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807086679] [2023-04-01 18:56:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:17,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:56:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 18:56:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:56:18,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807086679] [2023-04-01 18:56:18,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807086679] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:18,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583476449] [2023-04-01 18:56:18,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:56:18,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:18,006 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) [2023-04-01 18:56:18,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:56:18,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:56:18,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:18,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 18:56:18,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:18,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 18:56:18,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-04-01 18:56:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:56:18,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:18,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:18,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:56:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:56:18,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583476449] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:18,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:18,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2023-04-01 18:56:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77757265] [2023-04-01 18:56:18,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:18,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 18:56:18,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 18:56:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-04-01 18:56:18,412 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 24 states have internal predecessors, (82), 16 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (20), 15 states have call predecessors, (20), 15 states have call successors, (20) [2023-04-01 18:56:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:19,227 INFO L93 Difference]: Finished difference Result 190 states and 252 transitions. [2023-04-01 18:56:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 18:56:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 24 states have internal predecessors, (82), 16 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (20), 15 states have call predecessors, (20), 15 states have call successors, (20) Word has length 73 [2023-04-01 18:56:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:19,230 INFO L225 Difference]: With dead ends: 190 [2023-04-01 18:56:19,230 INFO L226 Difference]: Without dead ends: 188 [2023-04-01 18:56:19,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 18:56:19,231 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 113 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:19,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 380 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:56:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-04-01 18:56:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 138. [2023-04-01 18:56:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 100 states have (on average 1.24) internal successors, (124), 102 states have internal predecessors, (124), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 18:56:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2023-04-01 18:56:19,284 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 73 [2023-04-01 18:56:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:19,285 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2023-04-01 18:56:19,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 24 states have internal predecessors, (82), 16 states have call successors, (24), 4 states have call predecessors, (24), 1 states have return successors, (20), 15 states have call predecessors, (20), 15 states have call successors, (20) [2023-04-01 18:56:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2023-04-01 18:56:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 18:56:19,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:19,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:19,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:19,501 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 [2023-04-01 18:56:19,501 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:19,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash -435753533, now seen corresponding path program 1 times [2023-04-01 18:56:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:19,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157215872] [2023-04-01 18:56:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:19,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:56:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 18:56:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:56:19,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:19,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157215872] [2023-04-01 18:56:19,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157215872] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:19,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802508456] [2023-04-01 18:56:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:19,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:19,945 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) [2023-04-01 18:56:19,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:56:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:20,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 18:56:20,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:20,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:20,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:56:20,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:20,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:20,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 18:56:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:56:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802508456] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:20,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:20,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2023-04-01 18:56:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666975849] [2023-04-01 18:56:20,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:20,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 18:56:20,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 18:56:20,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 18:56:20,814 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 34 states, 32 states have (on average 3.15625) internal successors, (101), 31 states have internal predecessors, (101), 21 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 19 states have call predecessors, (25), 19 states have call successors, (25) [2023-04-01 18:56:25,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:31,093 INFO L93 Difference]: Finished difference Result 353 states and 477 transitions. [2023-04-01 18:56:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-04-01 18:56:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.15625) internal successors, (101), 31 states have internal predecessors, (101), 21 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 19 states have call predecessors, (25), 19 states have call successors, (25) Word has length 73 [2023-04-01 18:56:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:31,095 INFO L225 Difference]: With dead ends: 353 [2023-04-01 18:56:31,096 INFO L226 Difference]: Without dead ends: 351 [2023-04-01 18:56:31,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=566, Invalid=4126, Unknown=0, NotChecked=0, Total=4692 [2023-04-01 18:56:31,098 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 217 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 174 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:31,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 632 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2134 Invalid, 13 Unknown, 0 Unchecked, 9.4s Time] [2023-04-01 18:56:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-04-01 18:56:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 133. [2023-04-01 18:56:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 96 states have (on average 1.25) internal successors, (120), 97 states have internal predecessors, (120), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 18:56:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2023-04-01 18:56:31,135 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 73 [2023-04-01 18:56:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:31,136 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2023-04-01 18:56:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.15625) internal successors, (101), 31 states have internal predecessors, (101), 21 states have call successors, (29), 5 states have call predecessors, (29), 2 states have return successors, (25), 19 states have call predecessors, (25), 19 states have call successors, (25) [2023-04-01 18:56:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2023-04-01 18:56:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 18:56:31,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:31,137 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:31,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:31,341 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 [2023-04-01 18:56:31,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:31,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash -420822230, now seen corresponding path program 5 times [2023-04-01 18:56:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:31,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473489332] [2023-04-01 18:56:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 18:56:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 18:56:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 18:56:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-04-01 18:56:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 18:56:31,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:31,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473489332] [2023-04-01 18:56:31,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473489332] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:31,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111286652] [2023-04-01 18:56:31,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:56:31,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:31,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:31,721 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) [2023-04-01 18:56:31,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:56:31,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-01 18:56:31,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:31,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:56:31,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 18:56:32,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 18:56:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111286652] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:32,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:32,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2023-04-01 18:56:32,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852415211] [2023-04-01 18:56:32,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 18:56:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:32,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 18:56:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 18:56:32,557 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 33 states have internal predecessors, (112), 23 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 22 states have call predecessors, (28), 22 states have call successors, (28) [2023-04-01 18:56:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:33,064 INFO L93 Difference]: Finished difference Result 197 states and 243 transitions. [2023-04-01 18:56:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 18:56:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 33 states have internal predecessors, (112), 23 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 22 states have call predecessors, (28), 22 states have call successors, (28) Word has length 81 [2023-04-01 18:56:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:33,066 INFO L225 Difference]: With dead ends: 197 [2023-04-01 18:56:33,066 INFO L226 Difference]: Without dead ends: 153 [2023-04-01 18:56:33,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 18:56:33,068 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:33,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 98 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:56:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-04-01 18:56:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2023-04-01 18:56:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 100 states have (on average 1.22) internal successors, (122), 101 states have internal predecessors, (122), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 18:56:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2023-04-01 18:56:33,103 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 81 [2023-04-01 18:56:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:33,103 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2023-04-01 18:56:33,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 33 states have internal predecessors, (112), 23 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 22 states have call predecessors, (28), 22 states have call successors, (28) [2023-04-01 18:56:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2023-04-01 18:56:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 18:56:33,104 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:33,104 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:33,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:33,310 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 [2023-04-01 18:56:33,310 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:33,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -68842209, now seen corresponding path program 6 times [2023-04-01 18:56:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:33,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949103983] [2023-04-01 18:56:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:56:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-04-01 18:56:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:56:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 18:56:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 18:56:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 18:56:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:56:33,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:33,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949103983] [2023-04-01 18:56:33,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949103983] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:33,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104236187] [2023-04-01 18:56:33,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:56:33,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:33,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:33,775 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) [2023-04-01 18:56:33,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:56:33,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-04-01 18:56:33,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:33,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 18:56:33,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:33,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:56:33,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2023-04-01 18:56:34,114 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:56:34,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-04-01 18:56:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:56:34,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:34,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:34,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:56:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:56:34,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104236187] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:34,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:34,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 22 [2023-04-01 18:56:34,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028046913] [2023-04-01 18:56:34,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:34,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 18:56:34,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 18:56:34,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-04-01 18:56:34,297 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 14 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-04-01 18:56:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:35,576 INFO L93 Difference]: Finished difference Result 386 states and 546 transitions. [2023-04-01 18:56:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 18:56:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 14 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) Word has length 95 [2023-04-01 18:56:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:35,578 INFO L225 Difference]: With dead ends: 386 [2023-04-01 18:56:35,578 INFO L226 Difference]: Without dead ends: 384 [2023-04-01 18:56:35,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 203 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:56:35,580 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 97 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 520 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 18:56:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-04-01 18:56:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 198. [2023-04-01 18:56:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2482758620689656) internal successors, (181), 147 states have internal predecessors, (181), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-04-01 18:56:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2023-04-01 18:56:35,634 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 95 [2023-04-01 18:56:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:35,635 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2023-04-01 18:56:35,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 14 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-04-01 18:56:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2023-04-01 18:56:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 18:56:35,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:35,636 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:35,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:35,842 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 [2023-04-01 18:56:35,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:35,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -421930591, now seen corresponding path program 2 times [2023-04-01 18:56:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:35,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152816570] [2023-04-01 18:56:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:56:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-04-01 18:56:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:56:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 18:56:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 18:56:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 18:56:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:56:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:36,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152816570] [2023-04-01 18:56:36,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152816570] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:36,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12662140] [2023-04-01 18:56:36,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:56:36,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:36,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:36,287 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) [2023-04-01 18:56:36,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 18:56:36,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:56:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:56:36,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 18:56:36,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:36,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:36,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 18:56:37,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:56:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-01 18:56:37,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:37,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:37,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 18:56:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 18:56:37,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12662140] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:37,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:37,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 18] total 49 [2023-04-01 18:56:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284526936] [2023-04-01 18:56:37,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 18:56:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 18:56:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 18:56:37,825 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 49 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 43 states have internal predecessors, (136), 29 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (34), 27 states have call predecessors, (34), 27 states have call successors, (34) [2023-04-01 18:56:54,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:56:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:56:57,336 INFO L93 Difference]: Finished difference Result 783 states and 1132 transitions. [2023-04-01 18:56:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-04-01 18:56:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 43 states have internal predecessors, (136), 29 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (34), 27 states have call predecessors, (34), 27 states have call successors, (34) Word has length 95 [2023-04-01 18:56:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:56:57,341 INFO L225 Difference]: With dead ends: 783 [2023-04-01 18:56:57,341 INFO L226 Difference]: Without dead ends: 781 [2023-04-01 18:56:57,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 175 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5036 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2435, Invalid=14595, Unknown=0, NotChecked=0, Total=17030 [2023-04-01 18:56:57,345 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 807 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 4284 mSolverCounterSat, 511 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 4284 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:56:57,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 1067 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 4284 Invalid, 21 Unknown, 0 Unchecked, 16.1s Time] [2023-04-01 18:56:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2023-04-01 18:56:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 166. [2023-04-01 18:56:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 120 states have (on average 1.225) internal successors, (147), 123 states have internal predecessors, (147), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-01 18:56:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2023-04-01 18:56:57,414 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 95 [2023-04-01 18:56:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:56:57,415 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2023-04-01 18:56:57,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 43 states have internal predecessors, (136), 29 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (34), 27 states have call predecessors, (34), 27 states have call successors, (34) [2023-04-01 18:56:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2023-04-01 18:56:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 18:56:57,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:56:57,416 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:56:57,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 18:56:57,622 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 [2023-04-01 18:56:57,622 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:56:57,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:56:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash 563256456, now seen corresponding path program 7 times [2023-04-01 18:56:57,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:56:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284418523] [2023-04-01 18:56:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:56:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:56:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:56:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:56:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:56:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:56:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:56:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:56:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:56:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-04-01 18:56:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:56:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 18:56:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 18:56:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 18:56:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 18:56:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:56:58,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:56:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284418523] [2023-04-01 18:56:58,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284418523] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:56:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190496301] [2023-04-01 18:56:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:56:58,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:56:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:56:58,037 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) [2023-04-01 18:56:58,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 18:56:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:56:58,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 18:56:58,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:56:58,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:56:58,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 18:56:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:56:58,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:56:58,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:56:58,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-04-01 18:56:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:56:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190496301] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:56:58,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:56:58,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 31 [2023-04-01 18:56:58,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100111054] [2023-04-01 18:56:58,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:56:58,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 18:56:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:56:58,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 18:56:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2023-04-01 18:56:58,701 INFO L87 Difference]: Start difference. First operand 166 states and 208 transitions. Second operand has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 28 states have internal predecessors, (101), 20 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2023-04-01 18:57:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:00,859 INFO L93 Difference]: Finished difference Result 659 states and 957 transitions. [2023-04-01 18:57:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-04-01 18:57:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 28 states have internal predecessors, (101), 20 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) Word has length 103 [2023-04-01 18:57:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:00,862 INFO L225 Difference]: With dead ends: 659 [2023-04-01 18:57:00,863 INFO L226 Difference]: Without dead ends: 657 [2023-04-01 18:57:00,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=879, Invalid=6603, Unknown=0, NotChecked=0, Total=7482 [2023-04-01 18:57:00,865 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 192 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:00,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 840 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 18:57:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-04-01 18:57:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 315. [2023-04-01 18:57:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 231 states have (on average 1.277056277056277) internal successors, (295), 236 states have internal predecessors, (295), 67 states have call successors, (67), 17 states have call predecessors, (67), 16 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2023-04-01 18:57:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 428 transitions. [2023-04-01 18:57:00,973 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 428 transitions. Word has length 103 [2023-04-01 18:57:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:00,973 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 428 transitions. [2023-04-01 18:57:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.3666666666666667) internal successors, (101), 28 states have internal predecessors, (101), 20 states have call successors, (30), 4 states have call predecessors, (30), 1 states have return successors, (26), 19 states have call predecessors, (26), 19 states have call successors, (26) [2023-04-01 18:57:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 428 transitions. [2023-04-01 18:57:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 18:57:00,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:00,975 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:00,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 18:57:01,186 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 [2023-04-01 18:57:01,187 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:01,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash 547737738, now seen corresponding path program 2 times [2023-04-01 18:57:01,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:01,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38402435] [2023-04-01 18:57:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:01,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:57:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:57:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:57:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:57:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:57:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-04-01 18:57:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:57:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 18:57:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 18:57:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 18:57:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 18:57:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:57:01,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:01,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38402435] [2023-04-01 18:57:01,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38402435] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:01,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492316697] [2023-04-01 18:57:01,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:57:01,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:01,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:01,613 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) [2023-04-01 18:57:01,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 18:57:01,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:57:01,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:01,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 18:57:01,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:02,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 18:57:02,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:57:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:57:02,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:02,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-04-01 18:57:02,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 18:57:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 18:57:03,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492316697] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:03,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:03,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 19] total 52 [2023-04-01 18:57:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413172821] [2023-04-01 18:57:03,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:57:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:57:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2445, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:57:03,172 INFO L87 Difference]: Start difference. First operand 315 states and 428 transitions. Second operand has 52 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 46 states have internal predecessors, (143), 30 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (37), 28 states have call predecessors, (37), 28 states have call successors, (37) [2023-04-01 18:57:12,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:24,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:31,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:43,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:45,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:57:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:50,813 INFO L93 Difference]: Finished difference Result 1262 states and 1846 transitions. [2023-04-01 18:57:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-04-01 18:57:50,814 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 46 states have internal predecessors, (143), 30 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (37), 28 states have call predecessors, (37), 28 states have call successors, (37) Word has length 103 [2023-04-01 18:57:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:50,823 INFO L225 Difference]: With dead ends: 1262 [2023-04-01 18:57:50,823 INFO L226 Difference]: Without dead ends: 1260 [2023-04-01 18:57:50,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 192 SyntacticMatches, 9 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11982 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5073, Invalid=30837, Unknown=0, NotChecked=0, Total=35910 [2023-04-01 18:57:50,827 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 683 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 6557 mSolverCounterSat, 805 mSolverCounterUnsat, 50 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 7412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 6557 IncrementalHoareTripleChecker+Invalid, 50 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.6s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:50,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1702 Invalid, 7412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 6557 Invalid, 50 Unknown, 0 Unchecked, 41.6s Time] [2023-04-01 18:57:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2023-04-01 18:57:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 231. [2023-04-01 18:57:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 168 states have (on average 1.2738095238095237) internal successors, (214), 171 states have internal predecessors, (214), 45 states have call successors, (45), 18 states have call predecessors, (45), 17 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-04-01 18:57:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 303 transitions. [2023-04-01 18:57:50,935 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 303 transitions. Word has length 103 [2023-04-01 18:57:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:50,935 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 303 transitions. [2023-04-01 18:57:50,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 46 states have internal predecessors, (143), 30 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (37), 28 states have call predecessors, (37), 28 states have call successors, (37) [2023-04-01 18:57:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 303 transitions. [2023-04-01 18:57:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 18:57:50,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:50,937 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:50,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 18:57:51,144 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 [2023-04-01 18:57:51,144 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:51,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash 483537649, now seen corresponding path program 8 times [2023-04-01 18:57:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:51,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614479149] [2023-04-01 18:57:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:57:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:57:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:57:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:57:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:57:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-04-01 18:57:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:57:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-04-01 18:57:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-04-01 18:57:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 18:57:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-04-01 18:57:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 18:57:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 63 proven. 48 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 18:57:51,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614479149] [2023-04-01 18:57:51,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614479149] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846461845] [2023-04-01 18:57:51,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:57:51,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:51,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:51,657 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) [2023-04-01 18:57:51,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 18:57:51,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:57:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:51,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 18:57:51,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 84 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 18:57:52,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:57:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 84 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 18:57:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846461845] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:57:52,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:57:52,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 43 [2023-04-01 18:57:52,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564444532] [2023-04-01 18:57:52,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:57:52,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-01 18:57:52,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:57:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-01 18:57:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 18:57:52,761 INFO L87 Difference]: Start difference. First operand 231 states and 303 transitions. Second operand has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 42 states have internal predecessors, (148), 32 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (40), 31 states have call predecessors, (40), 31 states have call successors, (40) [2023-04-01 18:57:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:57:53,302 INFO L93 Difference]: Finished difference Result 317 states and 403 transitions. [2023-04-01 18:57:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 18:57:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 42 states have internal predecessors, (148), 32 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (40), 31 states have call predecessors, (40), 31 states have call successors, (40) Word has length 111 [2023-04-01 18:57:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:57:53,304 INFO L225 Difference]: With dead ends: 317 [2023-04-01 18:57:53,304 INFO L226 Difference]: Without dead ends: 257 [2023-04-01 18:57:53,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=655, Invalid=2207, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 18:57:53,305 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:57:53,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:57:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-04-01 18:57:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 235. [2023-04-01 18:57:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 172 states have (on average 1.244186046511628) internal successors, (214), 175 states have internal predecessors, (214), 45 states have call successors, (45), 18 states have call predecessors, (45), 17 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-04-01 18:57:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 303 transitions. [2023-04-01 18:57:53,399 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 303 transitions. Word has length 111 [2023-04-01 18:57:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:57:53,399 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 303 transitions. [2023-04-01 18:57:53,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.441860465116279) internal successors, (148), 42 states have internal predecessors, (148), 32 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (40), 31 states have call predecessors, (40), 31 states have call successors, (40) [2023-04-01 18:57:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 303 transitions. [2023-04-01 18:57:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 18:57:53,401 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:57:53,401 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:57:53,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 18:57:53,607 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 [2023-04-01 18:57:53,608 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:57:53,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:57:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2008096218, now seen corresponding path program 9 times [2023-04-01 18:57:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:57:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435619827] [2023-04-01 18:57:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:57:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:57:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:57:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:57:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 18:57:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 18:57:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 18:57:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 18:57:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:57:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-04-01 18:57:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-04-01 18:57:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 18:57:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-04-01 18:57:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-04-01 18:57:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-04-01 18:57:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-04-01 18:57:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-04-01 18:57:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-04-01 18:57:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:57:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 12 proven. 124 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 18:57:54,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:57:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435619827] [2023-04-01 18:57:54,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435619827] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:57:54,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417513022] [2023-04-01 18:57:54,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:57:54,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:57:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:57:54,103 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) [2023-04-01 18:57:54,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 18:57:54,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 18:57:54,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:57:54,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 18:57:54,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:57:54,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 18:58:04,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2023-04-01 18:59:05,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-04-01 18:59:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 21 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-04-01 18:59:05,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:07,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 18:59:07,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-04-01 18:59:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 12 proven. 124 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 18:59:07,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417513022] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:07,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:07,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 38 [2023-04-01 18:59:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548065502] [2023-04-01 18:59:07,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:07,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 18:59:07,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 18:59:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1258, Unknown=6, NotChecked=0, Total=1406 [2023-04-01 18:59:07,698 INFO L87 Difference]: Start difference. First operand 235 states and 303 transitions. Second operand has 38 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 35 states have internal predecessors, (127), 27 states have call successors, (37), 5 states have call predecessors, (37), 2 states have return successors, (33), 25 states have call predecessors, (33), 25 states have call successors, (33) [2023-04-01 18:59:09,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:11,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:13,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:21,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:23,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:26,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:32,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:34,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:36,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:42,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:44,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:50,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:52,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:54,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:00,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:02,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:04,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:06,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:08,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]