./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:42:56,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:42:56,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:42:56,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:42:56,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:42:56,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:42:56,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:42:56,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:42:56,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:42:56,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:42:56,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:42:56,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:42:56,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:42:56,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:42:56,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:42:56,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:42:56,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:42:56,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:42:56,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:42:56,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:42:56,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:42:56,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:42:56,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:42:56,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:42:56,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:42:56,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:42:56,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:42:56,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:42:56,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:42:56,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:42:56,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:42:56,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:42:56,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:42:56,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:42:56,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:42:56,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:42:56,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:42:56,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:42:56,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:42:56,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:42:56,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:42:56,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:42:56,853 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:42:56,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:42:56,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:42:56,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:42:56,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:42:56,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:42:56,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:42:56,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:42:56,855 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:42:56,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:42:56,856 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:42:56,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:42:56,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:42:56,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:42:56,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:42:56,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:42:56,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:42:56,857 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:42:56,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:42:56,858 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:42:56,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:42:56,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:42:56,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:42:56,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:42:56,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:42:56,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:42:56,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:42:56,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:42:56,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:42:56,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:42:56,861 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:42:56,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:42:56,861 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:42:56,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:42:56,861 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:42:56,861 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2023-02-13 22:42:57,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:42:57,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:42:57,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:42:57,102 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:42:57,102 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:42:57,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2023-02-13 22:42:58,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:42:58,293 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:42:58,294 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2023-02-13 22:42:58,297 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc16f6b38/5d464602bc53450e94e1ad58cd2caca7/FLAG03e416cbc [2023-02-13 22:42:58,307 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc16f6b38/5d464602bc53450e94e1ad58cd2caca7 [2023-02-13 22:42:58,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:42:58,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:42:58,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:42:58,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:42:58,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:42:58,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1173ae85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58, skipping insertion in model container [2023-02-13 22:42:58,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:42:58,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:42:58,408 WARN L237 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-cav19/array_init_var_plus_ind3.c[415,428] [2023-02-13 22:42:58,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:42:58,423 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:42:58,432 WARN L237 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-cav19/array_init_var_plus_ind3.c[415,428] [2023-02-13 22:42:58,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:42:58,448 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:42:58,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58 WrapperNode [2023-02-13 22:42:58,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:42:58,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:42:58,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:42:58,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:42:58,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,472 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2023-02-13 22:42:58,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:42:58,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:42:58,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:42:58,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:42:58,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,506 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:42:58,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:42:58,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:42:58,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:42:58,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (1/1) ... [2023-02-13 22:42:58,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:42:58,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:58,532 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) [2023-02-13 22:42:58,550 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 [2023-02-13 22:42:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:42:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:42:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:42:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:42:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:42:58,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:42:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:42:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:42:58,609 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:42:58,612 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:42:58,744 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:42:58,748 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:42:58,748 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-13 22:42:58,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:42:58 BoogieIcfgContainer [2023-02-13 22:42:58,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:42:58,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:42:58,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:42:58,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:42:58,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:42:58" (1/3) ... [2023-02-13 22:42:58,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5ffb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:42:58, skipping insertion in model container [2023-02-13 22:42:58,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:42:58" (2/3) ... [2023-02-13 22:42:58,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5ffb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:42:58, skipping insertion in model container [2023-02-13 22:42:58,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:42:58" (3/3) ... [2023-02-13 22:42:58,761 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2023-02-13 22:42:58,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:42:58,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:42:58,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:42:58,845 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;@196e64cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:42:58,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:42:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-13 22:42:58,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:58,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:58,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2023-02-13 22:42:58,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:58,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505173436] [2023-02-13 22:42:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:58,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:58,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:58,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505173436] [2023-02-13 22:42:58,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505173436] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:42:58,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:42:58,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 22:42:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627825539] [2023-02-13 22:42:58,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:42:58,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 22:42:58,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 22:42:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:42:58,998 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:59,010 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2023-02-13 22:42:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 22:42:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-13 22:42:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:59,017 INFO L225 Difference]: With dead ends: 27 [2023-02-13 22:42:59,017 INFO L226 Difference]: Without dead ends: 12 [2023-02-13 22:42:59,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:42:59,026 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:59,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-13 22:42:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-13 22:42:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-13 22:42:59,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2023-02-13 22:42:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:59,057 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-13 22:42:59,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-13 22:42:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-13 22:42:59,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:59,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:59,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 22:42:59,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2023-02-13 22:42:59,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:59,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724517409] [2023-02-13 22:42:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:59,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:59,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724517409] [2023-02-13 22:42:59,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724517409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:42:59,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:42:59,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:42:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470741124] [2023-02-13 22:42:59,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:42:59,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 22:42:59,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:59,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 22:42:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:59,156 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:59,195 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-02-13 22:42:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 22:42:59,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-13 22:42:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:59,196 INFO L225 Difference]: With dead ends: 29 [2023-02-13 22:42:59,196 INFO L226 Difference]: Without dead ends: 22 [2023-02-13 22:42:59,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:59,197 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:59,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-13 22:42:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2023-02-13 22:42:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-13 22:42:59,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-13 22:42:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:59,202 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-13 22:42:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-13 22:42:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-13 22:42:59,202 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:59,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 22:42:59,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2023-02-13 22:42:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258614330] [2023-02-13 22:42:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:59,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258614330] [2023-02-13 22:42:59,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258614330] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:42:59,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:42:59,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 22:42:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238907617] [2023-02-13 22:42:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:42:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 22:42:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 22:42:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:59,299 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:59,316 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-02-13 22:42:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 22:42:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-13 22:42:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:59,317 INFO L225 Difference]: With dead ends: 23 [2023-02-13 22:42:59,317 INFO L226 Difference]: Without dead ends: 15 [2023-02-13 22:42:59,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:42:59,318 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:59,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-13 22:42:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-02-13 22:42:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-02-13 22:42:59,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-02-13 22:42:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:59,322 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-02-13 22:42:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-02-13 22:42:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-13 22:42:59,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:59,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:59,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 22:42:59,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2023-02-13 22:42:59,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:59,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401630497] [2023-02-13 22:42:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:59,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:59,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401630497] [2023-02-13 22:42:59,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401630497] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731389028] [2023-02-13 22:42:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:59,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:59,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:59,462 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) [2023-02-13 22:42:59,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:42:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:59,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:42:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:42:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:59,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:42:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:59,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731389028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:42:59,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:42:59,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-02-13 22:42:59,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821891371] [2023-02-13 22:42:59,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:42:59,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 22:42:59,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:42:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 22:42:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:42:59,607 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:42:59,670 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-13 22:42:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 22:42:59,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-13 22:42:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:42:59,671 INFO L225 Difference]: With dead ends: 45 [2023-02-13 22:42:59,671 INFO L226 Difference]: Without dead ends: 36 [2023-02-13 22:42:59,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2023-02-13 22:42:59,673 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:42:59,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 57 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:42:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-13 22:42:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2023-02-13 22:42:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-13 22:42:59,677 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2023-02-13 22:42:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:42:59,677 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-13 22:42:59,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:42:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-13 22:42:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-13 22:42:59,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:42:59,678 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:42:59,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 22:42:59,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:59,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:42:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:42:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2023-02-13 22:42:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:42:59,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844552902] [2023-02-13 22:42:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:59,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:42:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:42:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:42:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:42:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844552902] [2023-02-13 22:42:59,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844552902] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:42:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217918192] [2023-02-13 22:42:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:42:59,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:42:59,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:42:59,988 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) [2023-02-13 22:42:59,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:43:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-13 22:43:00,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:00,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:00,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217918192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:00,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:00,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-13 22:43:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147964771] [2023-02-13 22:43:00,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:00,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 22:43:00,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 22:43:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:43:00,090 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:00,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:00,130 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-13 22:43:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-13 22:43:00,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-13 22:43:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:00,132 INFO L225 Difference]: With dead ends: 39 [2023-02-13 22:43:00,132 INFO L226 Difference]: Without dead ends: 27 [2023-02-13 22:43:00,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-13 22:43:00,133 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:00,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:43:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-13 22:43:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-13 22:43:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-02-13 22:43:00,137 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2023-02-13 22:43:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:00,137 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-02-13 22:43:00,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-02-13 22:43:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-13 22:43:00,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:00,138 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:00,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:00,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:00,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:00,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1859381769, now seen corresponding path program 2 times [2023-02-13 22:43:00,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:00,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215473111] [2023-02-13 22:43:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:00,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:00,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215473111] [2023-02-13 22:43:00,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215473111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026821587] [2023-02-13 22:43:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:43:00,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:00,529 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) [2023-02-13 22:43:00,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:43:00,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:43:00,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:43:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:00,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:00,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026821587] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:00,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:00,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-02-13 22:43:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456426838] [2023-02-13 22:43:00,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-13 22:43:00,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-13 22:43:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=263, Unknown=0, NotChecked=0, Total=462 [2023-02-13 22:43:00,876 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:01,036 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2023-02-13 22:43:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 22:43:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-13 22:43:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:01,038 INFO L225 Difference]: With dead ends: 102 [2023-02-13 22:43:01,039 INFO L226 Difference]: Without dead ends: 95 [2023-02-13 22:43:01,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=455, Unknown=0, NotChecked=0, Total=756 [2023-02-13 22:43:01,041 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 282 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:01,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 77 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-13 22:43:01,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2023-02-13 22:43:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-02-13 22:43:01,056 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 22 [2023-02-13 22:43:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:01,057 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-02-13 22:43:01,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-02-13 22:43:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-13 22:43:01,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:01,058 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:01,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:01,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:01,262 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1855888886, now seen corresponding path program 2 times [2023-02-13 22:43:01,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:01,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704037775] [2023-02-13 22:43:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:01,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:01,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704037775] [2023-02-13 22:43:01,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704037775] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44446440] [2023-02-13 22:43:01,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:43:01,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:01,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:01,562 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) [2023-02-13 22:43:01,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:43:01,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:43:01,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-13 22:43:01,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:01,861 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 13 treesize of output 9 [2023-02-13 22:43:01,918 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 9 [2023-02-13 22:43:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:01,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:01,980 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 14 [2023-02-13 22:43:01,984 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 24 treesize of output 20 [2023-02-13 22:43:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:02,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44446440] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:02,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:02,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2023-02-13 22:43:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100632477] [2023-02-13 22:43:02,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-13 22:43:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-13 22:43:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-02-13 22:43:02,235 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:02,432 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-02-13 22:43:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-13 22:43:02,432 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-13 22:43:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:02,435 INFO L225 Difference]: With dead ends: 61 [2023-02-13 22:43:02,436 INFO L226 Difference]: Without dead ends: 59 [2023-02-13 22:43:02,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2023-02-13 22:43:02,437 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:02,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 146 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-13 22:43:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2023-02-13 22:43:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-02-13 22:43:02,445 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 23 [2023-02-13 22:43:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:02,445 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-02-13 22:43:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-02-13 22:43:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-13 22:43:02,446 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:02,446 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:02,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 22:43:02,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:02,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -954451792, now seen corresponding path program 3 times [2023-02-13 22:43:02,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:02,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765052185] [2023-02-13 22:43:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:03,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765052185] [2023-02-13 22:43:03,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765052185] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476986940] [2023-02-13 22:43:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:43:03,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:03,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:03,065 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) [2023-02-13 22:43:03,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 22:43:03,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-13 22:43:03,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-13 22:43:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:03,223 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 15 treesize of output 11 [2023-02-13 22:43:03,296 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-02-13 22:43:03,297 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 1 case distinctions, treesize of input 29 treesize of output 28 [2023-02-13 22:43:03,350 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 21 treesize of output 9 [2023-02-13 22:43:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:03,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:03,522 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 23 treesize of output 21 [2023-02-13 22:43:03,525 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 58 treesize of output 54 [2023-02-13 22:43:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:03,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476986940] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:03,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:03,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-02-13 22:43:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556521739] [2023-02-13 22:43:03,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:03,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-13 22:43:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-13 22:43:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-02-13 22:43:03,769 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:04,037 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2023-02-13 22:43:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-13 22:43:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-13 22:43:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:04,038 INFO L225 Difference]: With dead ends: 56 [2023-02-13 22:43:04,038 INFO L226 Difference]: Without dead ends: 54 [2023-02-13 22:43:04,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2023-02-13 22:43:04,048 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:04,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 77 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:43:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-13 22:43:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-13 22:43:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-13 22:43:04,057 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 26 [2023-02-13 22:43:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:04,057 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-13 22:43:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-13 22:43:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-13 22:43:04,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:04,059 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:04,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:04,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:04,264 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 1 times [2023-02-13 22:43:04,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805567529] [2023-02-13 22:43:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:04,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:04,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:04,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805567529] [2023-02-13 22:43:04,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805567529] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:04,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052601179] [2023-02-13 22:43:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:04,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:04,357 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) [2023-02-13 22:43:04,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 22:43:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-13 22:43:04,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:04,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:04,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052601179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:04,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:04,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2023-02-13 22:43:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377250569] [2023-02-13 22:43:04,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-13 22:43:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-13 22:43:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-02-13 22:43:04,521 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:04,578 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2023-02-13 22:43:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-13 22:43:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-13 22:43:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:04,579 INFO L225 Difference]: With dead ends: 60 [2023-02-13 22:43:04,579 INFO L226 Difference]: Without dead ends: 48 [2023-02-13 22:43:04,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-02-13 22:43:04,581 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:04,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:43:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-13 22:43:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-13 22:43:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-02-13 22:43:04,596 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 27 [2023-02-13 22:43:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:04,597 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-02-13 22:43:04,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-02-13 22:43:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-13 22:43:04,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:04,598 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:04,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:04,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash 13772134, now seen corresponding path program 2 times [2023-02-13 22:43:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419729085] [2023-02-13 22:43:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:04,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:05,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419729085] [2023-02-13 22:43:05,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419729085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400587789] [2023-02-13 22:43:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:43:05,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:05,166 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) [2023-02-13 22:43:05,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 22:43:05,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:43:05,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-13 22:43:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:05,421 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 15 treesize of output 11 [2023-02-13 22:43:05,485 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 31 treesize of output 30 [2023-02-13 22:43:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:05,708 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 22:43:05,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:05,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 17 [2023-02-13 22:43:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:05,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:07,265 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 26 treesize of output 24 [2023-02-13 22:43:07,268 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 80 treesize of output 74 [2023-02-13 22:43:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:07,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400587789] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:07,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:07,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 49 [2023-02-13 22:43:07,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289525774] [2023-02-13 22:43:07,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:07,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-13 22:43:07,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-13 22:43:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1903, Unknown=2, NotChecked=0, Total=2352 [2023-02-13 22:43:07,697 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:08,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:08,991 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-02-13 22:43:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-13 22:43:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-13 22:43:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:08,992 INFO L225 Difference]: With dead ends: 69 [2023-02-13 22:43:08,992 INFO L226 Difference]: Without dead ends: 48 [2023-02-13 22:43:08,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=609, Invalid=2929, Unknown=2, NotChecked=0, Total=3540 [2023-02-13 22:43:08,993 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:08,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 134 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 521 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2023-02-13 22:43:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-13 22:43:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-02-13 22:43:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-13 22:43:08,999 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 30 [2023-02-13 22:43:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:08,999 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-13 22:43:09,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-13 22:43:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-13 22:43:09,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:09,002 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:09,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:09,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:09,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash -499327066, now seen corresponding path program 3 times [2023-02-13 22:43:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:09,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054938801] [2023-02-13 22:43:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:09,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054938801] [2023-02-13 22:43:09,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054938801] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221108791] [2023-02-13 22:43:09,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:43:09,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:09,872 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) [2023-02-13 22:43:09,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 22:43:09,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-13 22:43:09,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:09,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-13 22:43:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:10,159 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 15 treesize of output 11 [2023-02-13 22:43:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:10,225 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 38 treesize of output 31 [2023-02-13 22:43:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:10,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:10,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2023-02-13 22:43:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:10,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 22:43:10,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:10,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2023-02-13 22:43:10,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:10,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2023-02-13 22:43:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:10,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:11,031 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 31 treesize of output 29 [2023-02-13 22:43:11,035 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 266 treesize of output 258 [2023-02-13 22:43:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 4 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:43:11,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221108791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:11,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:11,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 54 [2023-02-13 22:43:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467190979] [2023-02-13 22:43:11,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:11,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-13 22:43:11,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-13 22:43:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2495, Unknown=0, NotChecked=0, Total=2862 [2023-02-13 22:43:11,503 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:43:11,879 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-02-13 22:43:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-13 22:43:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-13 22:43:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:43:11,880 INFO L225 Difference]: With dead ends: 57 [2023-02-13 22:43:11,880 INFO L226 Difference]: Without dead ends: 55 [2023-02-13 22:43:11,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2023-02-13 22:43:11,881 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:43:11,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 111 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:43:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-13 22:43:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2023-02-13 22:43:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2023-02-13 22:43:11,903 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 36 [2023-02-13 22:43:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:43:11,903 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2023-02-13 22:43:11,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:43:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2023-02-13 22:43:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-13 22:43:11,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:43:11,905 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-13 22:43:11,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 22:43:12,109 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,SelfDestructingSolverStorable10 [2023-02-13 22:43:12,110 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:43:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:43:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1128636068, now seen corresponding path program 4 times [2023-02-13 22:43:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:43:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448408956] [2023-02-13 22:43:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:43:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:43:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:43:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:43:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448408956] [2023-02-13 22:43:12,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448408956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:43:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34190234] [2023-02-13 22:43:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:43:12,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:43:12,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:43:12,577 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) [2023-02-13 22:43:12,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 22:43:12,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:43:12,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:43:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-13 22:43:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:43:12,744 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 15 treesize of output 11 [2023-02-13 22:43:12,801 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 34 treesize of output 33 [2023-02-13 22:43:12,861 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 34 treesize of output 33 [2023-02-13 22:43:12,931 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-02-13 22:43:12,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2023-02-13 22:43:13,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:13,227 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 36 treesize of output 12 [2023-02-13 22:43:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:13,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:43:30,004 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 81 treesize of output 77 [2023-02-13 22:43:30,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 22:43:30,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2731 treesize of output 2691 [2023-02-13 22:43:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:43:38,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34190234] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:43:38,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:43:38,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 57 [2023-02-13 22:43:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802406124] [2023-02-13 22:43:38,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:43:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-13 22:43:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:43:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-13 22:43:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2780, Unknown=7, NotChecked=0, Total=3192 [2023-02-13 22:43:38,367 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:44:00,450 WARN L233 SmtUtils]: Spent 18.86s on a formula simplification. DAG size of input: 92 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:44:02,475 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 [1] [2023-02-13 22:44:14,631 WARN L233 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 76 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:44:31,112 WARN L233 SmtUtils]: Spent 16.31s on a formula simplification. DAG size of input: 99 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:44:53,561 WARN L233 SmtUtils]: Spent 18.23s on a formula simplification. DAG size of input: 107 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:45:06,879 WARN L233 SmtUtils]: Spent 9.15s on a formula simplification. DAG size of input: 107 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:45:19,580 WARN L233 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 102 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:45:30,356 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 100 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:45:42,810 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 103 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:45:45,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-13 22:45:59,809 WARN L233 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 104 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:46:13,159 WARN L233 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 103 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:46:35,752 WARN L233 SmtUtils]: Spent 21.44s on a formula simplification. DAG size of input: 111 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:47:00,270 WARN L233 SmtUtils]: Spent 22.33s on a formula simplification. DAG size of input: 109 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:47:02,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-13 22:47:21,633 WARN L233 SmtUtils]: Spent 19.38s on a formula simplification. DAG size of input: 112 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 22:47:23,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]