./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_07.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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-examples/standard_two_index_07.i -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 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 18:56:18,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 18:56:18,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 18:56:18,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 18:56:18,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 18:56:18,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 18:56:18,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 18:56:18,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 18:56:18,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 18:56:18,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 18:56:18,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 18:56:18,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 18:56:18,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 18:56:18,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 18:56:18,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 18:56:18,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 18:56:18,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 18:56:18,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 18:56:18,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 18:56:18,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 18:56:18,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 18:56:18,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 18:56:18,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 18:56:18,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 18:56:18,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 18:56:18,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 18:56:18,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 18:56:18,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 18:56:18,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 18:56:18,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 18:56:18,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 18:56:18,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 18:56:18,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 18:56:18,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 18:56:18,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 18:56:18,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 18:56:18,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 18:56:18,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 18:56:18,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 18:56:18,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 18:56:18,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 18:56:18,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 18:56:18,883 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 18:56:18,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 18:56:18,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 18:56:18,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 18:56:18,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 18:56:18,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 18:56:18,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 18:56:18,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 18:56:18,887 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 18:56:18,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 18:56:18,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 18:56:18,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 18:56:18,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 18:56:18,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 18:56:18,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 18:56:18,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 18:56:18,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 18:56:18,889 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 18:56:18,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 18:56:18,890 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 18:56:18,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 18:56:18,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 18:56:18,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 18:56:18,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 18:56:18,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:56:18,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 18:56:18,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 18:56:18,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 18:56:18,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 18:56:18,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 18:56:18,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 18:56:18,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 18:56:18,892 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 18:56:18,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 18:56:18,893 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 18:56:18,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee [2023-02-17 18:56:19,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 18:56:19,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 18:56:19,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 18:56:19,165 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 18:56:19,165 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 18:56:19,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_07.i [2023-02-17 18:56:20,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 18:56:20,504 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 18:56:20,505 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_07.i [2023-02-17 18:56:20,510 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2ed3b2b/0635a945d44341c1b551e1f3dc6a5c2d/FLAG7c8e456b2 [2023-02-17 18:56:20,527 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2ed3b2b/0635a945d44341c1b551e1f3dc6a5c2d [2023-02-17 18:56:20,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 18:56:20,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 18:56:20,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 18:56:20,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 18:56:20,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 18:56:20,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c863599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20, skipping insertion in model container [2023-02-17 18:56:20,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 18:56:20,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 18:56:20,707 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-examples/standard_two_index_07.i[814,827] [2023-02-17 18:56:20,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:56:20,740 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 18:56:20,756 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-examples/standard_two_index_07.i[814,827] [2023-02-17 18:56:20,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:56:20,775 INFO L208 MainTranslator]: Completed translation [2023-02-17 18:56:20,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20 WrapperNode [2023-02-17 18:56:20,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 18:56:20,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 18:56:20,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 18:56:20,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 18:56:20,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,803 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-17 18:56:20,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 18:56:20,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 18:56:20,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 18:56:20,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 18:56:20,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 18:56:20,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 18:56:20,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 18:56:20,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 18:56:20,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (1/1) ... [2023-02-17 18:56:20,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:56:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:56:20,883 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) [2023-02-17 18:56:20,885 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 [2023-02-17 18:56:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 18:56:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 18:56:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 18:56:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 18:56:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 18:56:20,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 18:56:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 18:56:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 18:56:20,973 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 18:56:20,976 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 18:56:21,159 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 18:56:21,165 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 18:56:21,165 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 18:56:21,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:56:21 BoogieIcfgContainer [2023-02-17 18:56:21,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 18:56:21,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 18:56:21,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 18:56:21,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 18:56:21,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:56:20" (1/3) ... [2023-02-17 18:56:21,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c0fa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:56:21, skipping insertion in model container [2023-02-17 18:56:21,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:56:20" (2/3) ... [2023-02-17 18:56:21,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c0fa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:56:21, skipping insertion in model container [2023-02-17 18:56:21,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:56:21" (3/3) ... [2023-02-17 18:56:21,179 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2023-02-17 18:56:21,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 18:56:21,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 18:56:21,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 18:56:21,272 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;@8dff9aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 18:56:21,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 18:56:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) [2023-02-17 18:56:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 18:56:21,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:56:21,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:56:21,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:56:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:56:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2023-02-17 18:56:21,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:56:21,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263577586] [2023-02-17 18:56:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:56:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 18:56:21,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:56:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263577586] [2023-02-17 18:56:21,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263577586] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:56:21,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:56:21,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 18:56:21,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353751756] [2023-02-17 18:56:21,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:56:21,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:56:21,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:56:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:56:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 18:56:21,586 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-17 18:56:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:56:21,617 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-02-17 18:56:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:56:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2023-02-17 18:56:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:56:21,626 INFO L225 Difference]: With dead ends: 28 [2023-02-17 18:56:21,627 INFO L226 Difference]: Without dead ends: 12 [2023-02-17 18:56:21,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 18:56:21,634 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:56:21,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:56:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-17 18:56:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-17 18:56:21,678 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) [2023-02-17 18:56:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-17 18:56:21,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-02-17 18:56:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:56:21,681 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-17 18:56:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-17 18:56:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-17 18:56:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 18:56:21,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:56:21,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:56:21,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 18:56:21,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:56:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:56:21,684 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2023-02-17 18:56:21,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:56:21,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659402995] [2023-02-17 18:56:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:56:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 18:56:21,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:56:21,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659402995] [2023-02-17 18:56:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659402995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:56:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37123390] [2023-02-17 18:56:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:21,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:21,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:56:21,760 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) [2023-02-17 18:56:21,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 18:56:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-17 18:56:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:56:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:56:21,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:56:21,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37123390] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:56:21,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:56:21,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-02-17 18:56:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287565871] [2023-02-17 18:56:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:56:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:56:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:56:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:56:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 18:56:21,930 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-02-17 18:56:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:56:21,952 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-17 18:56:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:56:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 [2023-02-17 18:56:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:56:21,953 INFO L225 Difference]: With dead ends: 24 [2023-02-17 18:56:21,953 INFO L226 Difference]: Without dead ends: 18 [2023-02-17 18:56:21,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 18:56:21,955 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:56:21,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:56:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-17 18:56:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2023-02-17 18:56:21,959 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) [2023-02-17 18:56:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-17 18:56:21,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-02-17 18:56:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:56:21,960 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-17 18:56:21,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-02-17 18:56:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-17 18:56:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 18:56:21,961 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:56:21,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:56:21,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 18:56:22,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:22,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:56:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:56:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2023-02-17 18:56:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:56:22,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166293227] [2023-02-17 18:56:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:56:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:56:22,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:56:22,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166293227] [2023-02-17 18:56:22,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166293227] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:56:22,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332531186] [2023-02-17 18:56:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:22,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:22,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:56:22,265 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) [2023-02-17 18:56:22,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 18:56:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 18:56:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:56:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:56:22,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:56:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:56:22,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332531186] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:56:22,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:56:22,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 18:56:22,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706898275] [2023-02-17 18:56:22,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:56:22,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 18:56:22,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:56:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 18:56:22,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:56:22,398 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2023-02-17 18:56:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:56:22,463 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-02-17 18:56:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:56:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) Word has length 11 [2023-02-17 18:56:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:56:22,465 INFO L225 Difference]: With dead ends: 36 [2023-02-17 18:56:22,465 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 18:56:22,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:56:22,469 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:56:22,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:56:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 18:56:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2023-02-17 18:56:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-02-17 18:56:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-17 18:56:22,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2023-02-17 18:56:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:56:22,482 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-17 18:56:22,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2023-02-17 18:56:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-17 18:56:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 18:56:22,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:56:22,484 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:56:22,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 18:56:22,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-17 18:56:22,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:56:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:56:22,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2023-02-17 18:56:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:56:22,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298043899] [2023-02-17 18:56:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:22,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:56:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 18:56:22,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:56:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298043899] [2023-02-17 18:56:22,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298043899] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:56:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97699969] [2023-02-17 18:56:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 18:56:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:56:22,838 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) [2023-02-17 18:56:22,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 18:56:22,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 18:56:22,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:56:22,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 18:56:22,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:56:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 18:56:22,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:56:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 18:56:23,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97699969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:56:23,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:56:23,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-02-17 18:56:23,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714588347] [2023-02-17 18:56:23,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:56:23,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 18:56:23,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:56:23,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 18:56:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-17 18:56:23,019 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 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) [2023-02-17 18:56:23,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:56:23,102 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-02-17 18:56:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 18:56:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 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 15 [2023-02-17 18:56:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:56:23,105 INFO L225 Difference]: With dead ends: 57 [2023-02-17 18:56:23,105 INFO L226 Difference]: Without dead ends: 47 [2023-02-17 18:56:23,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-17 18:56:23,110 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:56:23,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:56:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-17 18:56:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2023-02-17 18:56:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2023-02-17 18:56:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-17 18:56:23,127 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2023-02-17 18:56:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:56:23,130 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-17 18:56:23,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 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) [2023-02-17 18:56:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-17 18:56:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 18:56:23,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:56:23,132 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:56:23,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 18:56:23,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:23,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:56:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:56:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2023-02-17 18:56:23,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:56:23,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924130576] [2023-02-17 18:56:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:56:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:56:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:56:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924130576] [2023-02-17 18:56:23,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924130576] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:56:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009573675] [2023-02-17 18:56:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 18:56:23,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:56:23,544 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) [2023-02-17 18:56:23,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 18:56:23,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 18:56:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:56:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 18:56:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:56:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:56:23,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:56:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:56:23,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009573675] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:56:23,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:56:23,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-17 18:56:23,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491319349] [2023-02-17 18:56:23,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:56:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 18:56:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:56:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 18:56:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-17 18:56:23,698 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2023-02-17 18:56:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:56:23,781 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2023-02-17 18:56:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 18:56:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 25 [2023-02-17 18:56:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:56:23,783 INFO L225 Difference]: With dead ends: 85 [2023-02-17 18:56:23,783 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 18:56:23,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-17 18:56:23,784 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:56:23,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:56:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 18:56:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2023-02-17 18:56:23,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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) [2023-02-17 18:56:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-17 18:56:23,790 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2023-02-17 18:56:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:56:23,790 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-17 18:56:23,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2023-02-17 18:56:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-17 18:56:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 18:56:23,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:56:23,791 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:56:23,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 18:56:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:23,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:56:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:56:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2023-02-17 18:56:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:56:23,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602295445] [2023-02-17 18:56:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:23,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:56:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:56:24,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:56:24,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602295445] [2023-02-17 18:56:24,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602295445] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:56:24,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310176492] [2023-02-17 18:56:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 18:56:24,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:24,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:56:24,240 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) [2023-02-17 18:56:24,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 18:56:24,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 18:56:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:56:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 18:56:24,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:56:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-17 18:56:24,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:56:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-17 18:56:24,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310176492] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:56:24,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:56:24,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2023-02-17 18:56:24,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003814394] [2023-02-17 18:56:24,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:56:24,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-17 18:56:24,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:56:24,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-17 18:56:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 18:56:24,658 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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) [2023-02-17 18:56:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:56:24,827 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2023-02-17 18:56:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-17 18:56:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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 31 [2023-02-17 18:56:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:56:24,831 INFO L225 Difference]: With dead ends: 142 [2023-02-17 18:56:24,832 INFO L226 Difference]: Without dead ends: 124 [2023-02-17 18:56:24,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 18:56:24,835 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 175 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:56:24,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 72 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:56:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-17 18:56:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2023-02-17 18:56:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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) [2023-02-17 18:56:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-02-17 18:56:24,854 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2023-02-17 18:56:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:56:24,854 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-02-17 18:56:24,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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) [2023-02-17 18:56:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-02-17 18:56:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 18:56:24,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:56:24,857 INFO L195 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:56:24,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 18:56:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:25,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:56:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:56:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1918403063, now seen corresponding path program 5 times [2023-02-17 18:56:25,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:56:25,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209802204] [2023-02-17 18:56:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:56:25,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:56:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:56:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-02-17 18:56:25,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:56:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209802204] [2023-02-17 18:56:25,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209802204] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:56:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464905095] [2023-02-17 18:56:25,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 18:56:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:56:25,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:56:25,484 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) [2023-02-17 18:56:25,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 18:59:28,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-02-17 18:59:28,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:59:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-17 18:59:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:59:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 18:59:28,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:59:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 18:59:29,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464905095] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:59:29,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:59:29,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 38, 38] total 84 [2023-02-17 18:59:29,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753293433] [2023-02-17 18:59:29,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:59:29,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-17 18:59:29,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:59:29,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-17 18:59:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2023-02-17 18:59:29,535 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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) [2023-02-17 18:59:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:59:29,863 INFO L93 Difference]: Finished difference Result 229 states and 285 transitions. [2023-02-17 18:59:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-17 18:59:29,864 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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 57 [2023-02-17 18:59:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:59:29,865 INFO L225 Difference]: With dead ends: 229 [2023-02-17 18:59:29,865 INFO L226 Difference]: Without dead ends: 208 [2023-02-17 18:59:29,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2023-02-17 18:59:29,868 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 400 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:59:29,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 133 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:59:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-02-17 18:59:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 112. [2023-02-17 18:59:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 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) [2023-02-17 18:59:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2023-02-17 18:59:29,876 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 57 [2023-02-17 18:59:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:59:29,876 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2023-02-17 18:59:29,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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) [2023-02-17 18:59:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2023-02-17 18:59:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-17 18:59:29,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:59:29,879 INFO L195 NwaCegarLoop]: trace histogram [81, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:59:29,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 18:59:30,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:59:30,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:59:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:59:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1886528083, now seen corresponding path program 6 times [2023-02-17 18:59:30,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:59:30,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446503545] [2023-02-17 18:59:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:59:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:59:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:59:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3531 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-17 18:59:30,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:59:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446503545] [2023-02-17 18:59:30,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446503545] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:59:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700156457] [2023-02-17 18:59:30,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 18:59:30,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:59:30,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:59:30,992 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) [2023-02-17 18:59:30,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 19:05:20,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-02-17 19:05:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:05:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 19:05:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:05:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3531 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-17 19:05:21,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:05:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3531 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-17 19:05:21,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700156457] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:05:21,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:05:21,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2023-02-17 19:05:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353605021] [2023-02-17 19:05:21,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:05:21,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-17 19:05:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:05:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-17 19:05:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 19:05:21,726 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 45 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) [2023-02-17 19:05:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:05:22,072 INFO L93 Difference]: Finished difference Result 346 states and 370 transitions. [2023-02-17 19:05:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 19:05:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 45 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) Word has length 110 [2023-02-17 19:05:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:05:22,076 INFO L225 Difference]: With dead ends: 346 [2023-02-17 19:05:22,076 INFO L226 Difference]: Without dead ends: 340 [2023-02-17 19:05:22,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 178 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 19:05:22,079 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 500 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 19:05:22,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 139 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 19:05:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-17 19:05:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 134. [2023-02-17 19:05:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 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) [2023-02-17 19:05:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2023-02-17 19:05:22,115 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 110 [2023-02-17 19:05:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:05:22,117 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2023-02-17 19:05:22,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 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) [2023-02-17 19:05:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2023-02-17 19:05:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-17 19:05:22,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:05:22,126 INFO L195 NwaCegarLoop]: trace histogram [81, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:05:22,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 19:05:22,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:05:22,341 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:05:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:05:22,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1272266707, now seen corresponding path program 7 times [2023-02-17 19:05:22,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:05:22,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452287530] [2023-02-17 19:05:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:05:22,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:05:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:05:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-17 19:05:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:05:24,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452287530] [2023-02-17 19:05:24,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452287530] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:05:24,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158300315] [2023-02-17 19:05:24,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 19:05:24,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:05:24,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:05:24,335 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) [2023-02-17 19:05:24,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 19:05:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:05:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-17 19:05:24,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:05:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2023-02-17 19:05:25,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:05:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2023-02-17 19:05:29,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158300315] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:05:29,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:05:29,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 84, 84] total 198 [2023-02-17 19:05:29,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340242770] [2023-02-17 19:05:29,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:05:29,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2023-02-17 19:05:29,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:05:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2023-02-17 19:05:29,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19502, Invalid=19504, Unknown=0, NotChecked=0, Total=39006 [2023-02-17 19:05:29,654 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 198 states, 198 states have (on average 1.1161616161616161) internal successors, (221), 198 states have internal predecessors, (221), 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) [2023-02-17 19:05:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:05:32,712 INFO L93 Difference]: Finished difference Result 586 states and 716 transitions. [2023-02-17 19:05:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2023-02-17 19:05:32,713 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 1.1161616161616161) internal successors, (221), 198 states have internal predecessors, (221), 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 132 [2023-02-17 19:05:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:05:32,715 INFO L225 Difference]: With dead ends: 586 [2023-02-17 19:05:32,716 INFO L226 Difference]: Without dead ends: 536 [2023-02-17 19:05:32,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 100 SyntacticMatches, 11 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22513 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=19502, Invalid=19504, Unknown=0, NotChecked=0, Total=39006 [2023-02-17 19:05:32,721 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1047 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 19:05:32,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 297 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 19:05:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-02-17 19:05:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 261. [2023-02-17 19:05:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 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) [2023-02-17 19:05:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2023-02-17 19:05:32,733 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 132 [2023-02-17 19:05:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:05:32,734 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2023-02-17 19:05:32,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 1.1161616161616161) internal successors, (221), 198 states have internal predecessors, (221), 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) [2023-02-17 19:05:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2023-02-17 19:05:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-02-17 19:05:32,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:05:32,737 INFO L195 NwaCegarLoop]: trace histogram [195, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:05:32,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-17 19:05:32,945 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,SelfDestructingSolverStorable8 [2023-02-17 19:05:32,946 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:05:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:05:32,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1631884663, now seen corresponding path program 8 times [2023-02-17 19:05:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:05:32,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624737653] [2023-02-17 19:05:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:05:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:05:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:05:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20650 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-02-17 19:05:36,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:05:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624737653] [2023-02-17 19:05:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624737653] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:05:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442123556] [2023-02-17 19:05:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 19:05:36,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:05:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:05:36,646 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) [2023-02-17 19:05:36,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 19:05:37,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 19:05:37,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:05:37,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2319 conjuncts, 197 conjunts are in the unsatisfiable core [2023-02-17 19:05:37,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:05:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20650 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2023-02-17 19:05:39,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:05:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20650 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2023-02-17 19:05:58,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442123556] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:05:58,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:05:58,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 198, 198] total 423 [2023-02-17 19:05:58,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481464770] [2023-02-17 19:05:58,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:05:58,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 423 states [2023-02-17 19:05:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:05:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 423 interpolants. [2023-02-17 19:05:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89252, Invalid=89254, Unknown=0, NotChecked=0, Total=178506 [2023-02-17 19:05:58,098 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand has 423 states, 423 states have (on average 1.0921985815602837) internal successors, (462), 423 states have internal predecessors, (462), 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) [2023-02-17 19:06:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:06:19,423 INFO L93 Difference]: Finished difference Result 998 states and 1255 transitions. [2023-02-17 19:06:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 423 states. [2023-02-17 19:06:19,424 INFO L78 Accepts]: Start accepts. Automaton has has 423 states, 423 states have (on average 1.0921985815602837) internal successors, (462), 423 states have internal predecessors, (462), 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 259 [2023-02-17 19:06:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:06:19,427 INFO L225 Difference]: With dead ends: 998 [2023-02-17 19:06:19,427 INFO L226 Difference]: Without dead ends: 935 [2023-02-17 19:06:19,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 126 SyntacticMatches, 27 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113142 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=89252, Invalid=89254, Unknown=0, NotChecked=0, Total=178506 [2023-02-17 19:06:19,436 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2631 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2631 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:06:19,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2631 Valid, 527 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 19:06:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2023-02-17 19:06:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 515. [2023-02-17 19:06:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.0058365758754864) internal successors, (517), 514 states have internal predecessors, (517), 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) [2023-02-17 19:06:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 517 transitions. [2023-02-17 19:06:19,453 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 517 transitions. Word has length 259 [2023-02-17 19:06:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:06:19,453 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 517 transitions. [2023-02-17 19:06:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 423 states, 423 states have (on average 1.0921985815602837) internal successors, (462), 423 states have internal predecessors, (462), 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) [2023-02-17 19:06:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 517 transitions. [2023-02-17 19:06:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-02-17 19:06:19,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:06:19,462 INFO L195 NwaCegarLoop]: trace histogram [420, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:06:19,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 19:06:19,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 19:06:19,672 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:06:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:06:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1889128936, now seen corresponding path program 9 times [2023-02-17 19:06:19,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:06:19,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020603218] [2023-02-17 19:06:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:06:19,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:06:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:06:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 91980 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 88410 trivial. 0 not checked. [2023-02-17 19:06:28,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:06:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020603218] [2023-02-17 19:06:28,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020603218] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:06:28,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409715561] [2023-02-17 19:06:28,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 19:06:28,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:06:28,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:06:28,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:06:28,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process