./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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-fpi/eqn4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:08:33,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:08:33,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:08:33,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:08:33,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:08:33,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:08:33,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:08:33,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:08:33,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:08:33,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:08:33,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:08:33,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:08:33,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:08:33,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:08:33,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:08:33,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:08:33,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:08:33,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:08:33,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:08:33,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:08:33,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:08:33,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:08:33,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:08:33,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:08:33,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:08:33,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:08:33,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:08:33,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:08:33,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:08:33,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:08:33,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:08:33,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:08:33,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:08:33,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:08:33,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:08:33,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:08:33,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:08:33,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:08:33,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:08:33,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:08:33,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:08:33,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:08:33,901 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:08:33,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:08:33,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:08:33,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:08:33,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:08:33,903 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:08:33,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:08:33,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:08:33,904 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:08:33,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:08:33,904 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:08:33,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:08:33,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:08:33,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:08:33,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:08:33,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:08:33,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:08:33,906 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:08:33,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:08:33,906 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:08:33,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:08:33,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:08:33,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:08:33,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:08:33,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:08:33,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:08:33,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:08:33,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:08:33,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:08:33,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:08:33,908 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:08:33,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:08:33,909 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:08:33,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:08:33,909 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:08:33,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a [2023-02-14 22:08:34,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:08:34,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:08:34,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:08:34,208 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:08:34,208 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:08:34,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4.c [2023-02-14 22:08:35,310 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:08:35,490 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:08:35,490 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4.c [2023-02-14 22:08:35,496 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1995ec65b/c7f90f7828c64719924ab36738396a7b/FLAG46e0bce27 [2023-02-14 22:08:35,513 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1995ec65b/c7f90f7828c64719924ab36738396a7b [2023-02-14 22:08:35,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:08:35,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:08:35,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:08:35,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:08:35,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:08:35,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f52b519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35, skipping insertion in model container [2023-02-14 22:08:35,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:08:35,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:08:35,694 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-fpi/eqn4.c[587,600] [2023-02-14 22:08:35,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:08:35,725 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:08:35,740 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-fpi/eqn4.c[587,600] [2023-02-14 22:08:35,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:08:35,758 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:08:35,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35 WrapperNode [2023-02-14 22:08:35,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:08:35,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:08:35,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:08:35,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:08:35,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,789 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-14 22:08:35,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:08:35,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:08:35,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:08:35,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:08:35,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,818 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:08:35,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:08:35,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:08:35,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:08:35,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (1/1) ... [2023-02-14 22:08:35,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:08:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:35,893 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) [2023-02-14 22:08:35,902 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 [2023-02-14 22:08:35,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:08:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:08:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 22:08:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:08:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:08:35,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:08:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 22:08:36,014 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:08:36,016 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:08:36,236 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:08:36,241 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:08:36,241 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 22:08:36,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:08:36 BoogieIcfgContainer [2023-02-14 22:08:36,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:08:36,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:08:36,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:08:36,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:08:36,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:08:35" (1/3) ... [2023-02-14 22:08:36,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e38c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:08:36, skipping insertion in model container [2023-02-14 22:08:36,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:35" (2/3) ... [2023-02-14 22:08:36,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e38c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:08:36, skipping insertion in model container [2023-02-14 22:08:36,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:08:36" (3/3) ... [2023-02-14 22:08:36,250 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn4.c [2023-02-14 22:08:36,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:08:36,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:08:36,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:08:36,357 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;@7e0e193f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:08:36,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:08:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2023-02-14 22:08:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:08:36,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:36,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:36,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:36,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-14 22:08:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682388885] [2023-02-14 22:08:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:36,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682388885] [2023-02-14 22:08:36,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 22:08:36,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918595814] [2023-02-14 22:08:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:36,550 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) [2023-02-14 22:08:36,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:08:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 22:08:36,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:36,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:08:36,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918595814] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:08:36,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:08:36,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 22:08:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380435942] [2023-02-14 22:08:36,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:08:36,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 22:08:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 22:08:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:08:36,676 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-14 22:08:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:36,691 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-14 22:08:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 22:08:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-02-14 22:08:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:36,699 INFO L225 Difference]: With dead ends: 38 [2023-02-14 22:08:36,699 INFO L226 Difference]: Without dead ends: 17 [2023-02-14 22:08:36,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 22:08:36,705 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:36,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:08:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-14 22:08:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-14 22:08:36,736 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) [2023-02-14 22:08:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-14 22:08:36,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-14 22:08:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:36,741 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-14 22:08:36,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-14 22:08:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-14 22:08:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 22:08:36,743 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:36,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:36,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:36,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 22:08:36,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:36,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:36,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-14 22:08:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72061075] [2023-02-14 22:08:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:36,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:36,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:36,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449209172] [2023-02-14 22:08:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:36,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:36,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:36,989 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) [2023-02-14 22:08:37,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:08:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 22:08:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:37,215 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-14 22:08:37,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-14 22:08:37,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:37,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:37,303 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-02-14 22:08:37,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 19 [2023-02-14 22:08:37,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:08:37,331 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:08:37,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-14 22:08:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:37,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:08:37,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72061075] [2023-02-14 22:08:37,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:37,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449209172] [2023-02-14 22:08:37,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449209172] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:08:37,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:08:37,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:08:37,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777176518] [2023-02-14 22:08:37,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:08:37,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:08:37,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:08:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:08:37,395 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-14 22:08:37,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:37,501 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-14 22:08:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:08:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2023-02-14 22:08:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:37,504 INFO L225 Difference]: With dead ends: 34 [2023-02-14 22:08:37,504 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 22:08:37,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:08:37,509 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:37,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:08:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 22:08:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-14 22:08:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2023-02-14 22:08:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-14 22:08:37,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2023-02-14 22:08:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:37,518 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-14 22:08:37,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-02-14 22:08:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-14 22:08:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 22:08:37,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:37,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:37,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 22:08:37,725 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,SelfDestructingSolverStorable1 [2023-02-14 22:08:37,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2023-02-14 22:08:37,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937967252] [2023-02-14 22:08:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:37,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:37,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850690357] [2023-02-14 22:08:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:37,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:37,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:37,761 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) [2023-02-14 22:08:37,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:08:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 22:08:37,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:37,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:08:37,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937967252] [2023-02-14 22:08:37,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850690357] [2023-02-14 22:08:37,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850690357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:08:37,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:08:37,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:08:37,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73475256] [2023-02-14 22:08:37,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:08:37,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:08:37,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:37,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:08:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:08:37,869 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2023-02-14 22:08:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:37,938 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-02-14 22:08:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:08:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) Word has length 14 [2023-02-14 22:08:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:37,940 INFO L225 Difference]: With dead ends: 49 [2023-02-14 22:08:37,940 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 22:08:37,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:08:37,942 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:37,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:08:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 22:08:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-02-14 22:08:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2023-02-14 22:08:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-14 22:08:37,947 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-14 22:08:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:37,948 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-14 22:08:37,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2023-02-14 22:08:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-14 22:08:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 22:08:37,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:37,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:37,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:38,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:38,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:38,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2023-02-14 22:08:38,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:38,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43597001] [2023-02-14 22:08:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:38,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:38,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:38,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413562911] [2023-02-14 22:08:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:38,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:38,194 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) [2023-02-14 22:08:38,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:08:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:38,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 22:08:38,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:38,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43597001] [2023-02-14 22:08:38,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413562911] [2023-02-14 22:08:38,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413562911] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:38,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:38,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-02-14 22:08:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64381691] [2023-02-14 22:08:38,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:38,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:08:38,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:08:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:08:38,331 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2023-02-14 22:08:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:38,433 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-14 22:08:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 22:08:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 14 [2023-02-14 22:08:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:38,434 INFO L225 Difference]: With dead ends: 44 [2023-02-14 22:08:38,434 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 22:08:38,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:08:38,435 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:38,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:08:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 22:08:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-02-14 22:08:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2023-02-14 22:08:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-14 22:08:38,451 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-02-14 22:08:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:38,452 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-14 22:08:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2023-02-14 22:08:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-14 22:08:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 22:08:38,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:38,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:38,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:38,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:38,659 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2023-02-14 22:08:38,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:38,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324892642] [2023-02-14 22:08:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:38,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:38,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881445091] [2023-02-14 22:08:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:38,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:38,701 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) [2023-02-14 22:08:38,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:08:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:38,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 22:08:38,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:38,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:08:38,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324892642] [2023-02-14 22:08:38,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881445091] [2023-02-14 22:08:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881445091] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:08:38,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:08:38,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:08:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954831902] [2023-02-14 22:08:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:08:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:08:38,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:08:38,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:08:38,835 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2023-02-14 22:08:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:38,912 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-02-14 22:08:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:08:38,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 16 [2023-02-14 22:08:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:38,915 INFO L225 Difference]: With dead ends: 41 [2023-02-14 22:08:38,915 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 22:08:38,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:08:38,920 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:38,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:08:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 22:08:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-14 22:08:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2023-02-14 22:08:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-14 22:08:38,927 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2023-02-14 22:08:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:38,928 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-14 22:08:38,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2023-02-14 22:08:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-14 22:08:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 22:08:38,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:38,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:38,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:39,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:39,136 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-14 22:08:39,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:39,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629002753] [2023-02-14 22:08:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:39,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:39,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378432290] [2023-02-14 22:08:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:39,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:39,181 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) [2023-02-14 22:08:39,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 22:08:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:39,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 22:08:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:39,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:08:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:39,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-14 22:08:39,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:39,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 22:08:39,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-14 22:08:39,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-14 22:08:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:39,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:39,547 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_158 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_158) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2023-02-14 22:08:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-02-14 22:08:39,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629002753] [2023-02-14 22:08:39,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378432290] [2023-02-14 22:08:39,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378432290] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:39,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:39,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-14 22:08:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499764148] [2023-02-14 22:08:39,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 22:08:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 22:08:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=67, Unknown=1, NotChecked=16, Total=110 [2023-02-14 22:08:39,560 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2023-02-14 22:08:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:39,835 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-14 22:08:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 22:08:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 16 [2023-02-14 22:08:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:39,839 INFO L225 Difference]: With dead ends: 54 [2023-02-14 22:08:39,839 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 22:08:39,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=218, Unknown=1, NotChecked=32, Total=342 [2023-02-14 22:08:39,840 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:39,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 63 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2023-02-14 22:08:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 22:08:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2023-02-14 22:08:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-14 22:08:39,845 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2023-02-14 22:08:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:39,846 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-14 22:08:39,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2023-02-14 22:08:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-14 22:08:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 22:08:39,846 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:39,846 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:39,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:40,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:40,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2023-02-14 22:08:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:40,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813705076] [2023-02-14 22:08:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:40,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:40,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:40,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353403004] [2023-02-14 22:08:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:40,069 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) [2023-02-14 22:08:40,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 22:08:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:08:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 22:08:40,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:40,218 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-14 22:08:40,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-02-14 22:08:40,249 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2023-02-14 22:08:40,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2023-02-14 22:08:40,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:40,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:40,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:08:40,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2023-02-14 22:08:40,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:40,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2023-02-14 22:08:40,365 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:08:40,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2023-02-14 22:08:40,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 22:08:40,407 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:40,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-14 22:08:40,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:08:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:40,455 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 22:08:40,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-02-14 22:08:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:40,506 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 22:08:40,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-02-14 22:08:40,662 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 22:08:40,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2023-02-14 22:08:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:40,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:41,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:41,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813705076] [2023-02-14 22:08:41,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:41,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353403004] [2023-02-14 22:08:41,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353403004] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:41,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:41,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-02-14 22:08:41,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875080179] [2023-02-14 22:08:41,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:41,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 22:08:41,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 22:08:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:08:41,067 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2023-02-14 22:08:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:42,642 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-02-14 22:08:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 22:08:42,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) Word has length 20 [2023-02-14 22:08:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:42,643 INFO L225 Difference]: With dead ends: 82 [2023-02-14 22:08:42,643 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 22:08:42,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2023-02-14 22:08:42,644 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:42,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 104 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 22:08:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 22:08:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-02-14 22:08:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-02-14 22:08:42,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 20 [2023-02-14 22:08:42,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:42,666 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-02-14 22:08:42,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2023-02-14 22:08:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-02-14 22:08:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 22:08:42,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:42,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:42,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:42,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:42,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2023-02-14 22:08:42,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:42,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865063268] [2023-02-14 22:08:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:42,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:42,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467203075] [2023-02-14 22:08:42,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:08:42,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:42,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:42,925 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) [2023-02-14 22:08:42,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 22:08:42,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:08:42,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:08:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 22:08:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:08:43,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:08:43,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865063268] [2023-02-14 22:08:43,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:43,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467203075] [2023-02-14 22:08:43,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467203075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:43,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:43,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 22:08:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426717853] [2023-02-14 22:08:43,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:43,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:08:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:08:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:08:43,074 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2023-02-14 22:08:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:43,197 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2023-02-14 22:08:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:08:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 20 [2023-02-14 22:08:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:43,200 INFO L225 Difference]: With dead ends: 103 [2023-02-14 22:08:43,200 INFO L226 Difference]: Without dead ends: 80 [2023-02-14 22:08:43,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:08:43,202 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:43,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:08:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-14 22:08:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2023-02-14 22:08:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2023-02-14 22:08:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-14 22:08:43,229 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2023-02-14 22:08:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:43,229 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-14 22:08:43,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2023-02-14 22:08:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-14 22:08:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 22:08:43,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:43,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:43,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:43,437 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,SelfDestructingSolverStorable7 [2023-02-14 22:08:43,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 3 times [2023-02-14 22:08:43,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:43,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784802427] [2023-02-14 22:08:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:43,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:43,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:43,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028707043] [2023-02-14 22:08:43,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 22:08:43,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:43,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:43,464 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) [2023-02-14 22:08:43,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 22:08:43,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 22:08:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:08:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 22:08:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:43,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784802427] [2023-02-14 22:08:43,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028707043] [2023-02-14 22:08:43,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028707043] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:43,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:43,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-14 22:08:43,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603580672] [2023-02-14 22:08:43,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:43,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:08:43,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:43,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:08:43,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:08:43,845 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:44,113 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2023-02-14 22:08:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 22:08:44,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-14 22:08:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:44,114 INFO L225 Difference]: With dead ends: 113 [2023-02-14 22:08:44,114 INFO L226 Difference]: Without dead ends: 81 [2023-02-14 22:08:44,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-02-14 22:08:44,115 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 142 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:44,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 68 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:08:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-14 22:08:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2023-02-14 22:08:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-14 22:08:44,125 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 22 [2023-02-14 22:08:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:44,125 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-14 22:08:44,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-14 22:08:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 22:08:44,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:44,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:44,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:44,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:44,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 2 times [2023-02-14 22:08:44,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:44,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684497493] [2023-02-14 22:08:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:44,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:44,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:44,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889259658] [2023-02-14 22:08:44,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:08:44,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:44,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:44,359 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) [2023-02-14 22:08:44,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 22:08:44,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:08:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:08:44,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 22:08:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:08:44,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 22:08:44,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:44,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684497493] [2023-02-14 22:08:44,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:44,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889259658] [2023-02-14 22:08:44,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889259658] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:44,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:44,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-14 22:08:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019552311] [2023-02-14 22:08:44,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:44,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:08:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:08:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:08:44,531 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2023-02-14 22:08:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:44,780 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-14 22:08:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 22:08:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 24 [2023-02-14 22:08:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:44,781 INFO L225 Difference]: With dead ends: 83 [2023-02-14 22:08:44,781 INFO L226 Difference]: Without dead ends: 67 [2023-02-14 22:08:44,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-02-14 22:08:44,782 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:44,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 105 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:08:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-14 22:08:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2023-02-14 22:08:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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) [2023-02-14 22:08:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-14 22:08:44,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2023-02-14 22:08:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:44,789 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-14 22:08:44,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2023-02-14 22:08:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-14 22:08:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 22:08:44,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:44,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:44,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-14 22:08:44,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 22:08:44,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2023-02-14 22:08:44,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:44,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913998269] [2023-02-14 22:08:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:45,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412221594] [2023-02-14 22:08:45,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 22:08:45,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:45,018 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:08:45,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 22:08:45,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 22:08:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:08:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 22:08:45,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:45,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:08:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-14 22:08:45,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:45,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 22:08:45,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 22:08:45,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-14 22:08:45,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2023-02-14 22:08:45,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-14 22:08:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 24 [2023-02-14 22:08:45,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2023-02-14 22:08:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-14 22:08:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:45,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-14 22:08:45,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-14 22:08:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:45,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:08:46,028 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_372) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2023-02-14 22:08:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2023-02-14 22:08:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:08:46,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913998269] [2023-02-14 22:08:46,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:08:46,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412221594] [2023-02-14 22:08:46,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412221594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:08:46,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:08:46,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-02-14 22:08:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369503316] [2023-02-14 22:08:46,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:08:46,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 22:08:46,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:08:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 22:08:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=248, Unknown=1, NotChecked=34, Total=380 [2023-02-14 22:08:46,052 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2023-02-14 22:08:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:08:46,748 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2023-02-14 22:08:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 22:08:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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 24 [2023-02-14 22:08:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:08:46,750 INFO L225 Difference]: With dead ends: 102 [2023-02-14 22:08:46,750 INFO L226 Difference]: Without dead ends: 100 [2023-02-14 22:08:46,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=719, Unknown=1, NotChecked=60, Total=1056 [2023-02-14 22:08:46,751 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 131 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 32 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:08:46,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 150 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 216 Invalid, 3 Unknown, 44 Unchecked, 0.3s Time] [2023-02-14 22:08:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-14 22:08:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 49. [2023-02-14 22:08:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 22:08:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-14 22:08:46,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2023-02-14 22:08:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:08:46,760 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-14 22:08:46,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2023-02-14 22:08:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-14 22:08:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:08:46,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:08:46,761 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:08:46,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 22:08:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 22:08:46,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:08:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:08:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2023-02-14 22:08:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:08:46,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11589430] [2023-02-14 22:08:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:08:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:08:46,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:08:46,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47540609] [2023-02-14 22:08:46,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 22:08:46,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:08:46,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:08:46,986 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:08:46,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 22:08:47,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 22:08:47,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:08:47,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 22:08:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:08:47,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:08:47,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-02-14 22:08:47,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-02-14 22:08:47,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:47,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:08:47,248 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:08:47,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2023-02-14 22:08:47,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2023-02-14 22:08:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 42 [2023-02-14 22:08:47,357 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:08:47,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 67 [2023-02-14 22:08:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 117 [2023-02-14 22:08:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2023-02-14 22:08:47,508 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:08:47,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2023-02-14 22:08:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2023-02-14 22:08:47,645 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:08:47,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 161 treesize of output 143 [2023-02-14 22:08:47,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:08:47,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:08:47,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 213 [2023-02-14 22:08:48,075 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-14 22:08:48,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 40 [2023-02-14 22:08:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:08:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:09:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:09:00,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:09:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11589430] [2023-02-14 22:09:00,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 22:09:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47540609] [2023-02-14 22:09:00,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47540609] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:09:00,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:09:00,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2023-02-14 22:09:00,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966179207] [2023-02-14 22:09:00,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 22:09:00,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 22:09:00,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:09:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 22:09:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 22:09:00,576 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 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) [2023-02-14 22:09:25,468 WARN L233 SmtUtils]: Spent 22.53s on a formula simplification. DAG size of input: 187 DAG size of output: 149 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:09:55,358 WARN L233 SmtUtils]: Spent 25.42s on a formula simplification. DAG size of input: 240 DAG size of output: 202 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:09:57,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:11:01,892 WARN L233 SmtUtils]: Spent 48.53s on a formula simplification. DAG size of input: 207 DAG size of output: 162 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:12:01,012 WARN L233 SmtUtils]: Spent 57.36s on a formula simplification. DAG size of input: 211 DAG size of output: 166 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:12:03,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:12:06,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 22:12:15,007 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse72 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse76 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse46 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse23 (* 8 .cse46)) (.cse74 (* .cse76 8)) (.cse75 (mod .cse72 4294967296))) (let ((.cse71 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (.cse40 (<= .cse75 2147483647)) (.cse25 (<= .cse76 2147483647)) (.cse73 (* .cse75 8)) (.cse10 (+ .cse74 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse6 (select .cse9 (+ .cse23 |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse7 (select .cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse23)))) (let ((.cse2 (store .cse9 .cse10 (+ .cse6 .cse7))) (.cse4 (+ .cse73 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse22 (+ .cse74 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse5 (+ .cse74 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse32 (not .cse25)) (.cse12 (< |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse24 (+ .cse73 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse17 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse20 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse39 (+ .cse73 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse14 (not .cse40)) (.cse3 (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse0 (< .cse72 c_~N~0)) (.cse1 (not (< 2 c_~N~0))) (.cse8 (< .cse71 c_~N~0))) (and (or .cse0 .cse1 (= (select .cse2 .cse3) 25)) (or (= 25 (select (store .cse2 .cse4 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse6 .cse7)) .cse3)) .cse8 .cse1) (or (= (select (store .cse9 .cse4 (+ (select .cse9 .cse10) (select .cse11 .cse5))) .cse3) 25) .cse8 .cse1) (or .cse12 (let ((.cse13 (<= .cse46 2147483647))) (and (or .cse13 (and .cse14 (forall ((v_ArrVal_426 Int)) (= (let ((.cse21 (store (store .cse11 .cse22 (+ (select .cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse23)) 8)) .cse24 v_ArrVal_426))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21))) (let ((.cse16 (select .cse15 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse18 (select .cse16 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse19 (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse15 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse16 .cse17 (+ .cse18 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20) .cse18 .cse19))))) 25)))) (or (let ((.cse31 (+ 8 .cse7))) (and (or .cse25 (forall ((v_ArrVal_426 Int)) (= (let ((.cse30 (store (store .cse11 .cse22 .cse31) .cse24 v_ArrVal_426))) (let ((.cse28 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse30))) (let ((.cse29 (select .cse28 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse26 (select .cse30 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse27 (select .cse29 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse26 .cse27 (select (select (store .cse28 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse29 .cse17 (+ .cse26 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20)))))) 25))) (or .cse32 (let ((.cse38 (store .cse11 .cse5 .cse31))) (and (or (forall ((v_ArrVal_426 Int)) (= (let ((.cse37 (store .cse38 .cse39 v_ArrVal_426))) (let ((.cse35 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse37))) (let ((.cse36 (select .cse35 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse33 (select .cse37 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse34 (select .cse36 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse33 .cse34 (select (select (store .cse35 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse36 .cse17 (+ .cse33 .cse34))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20)))))) 25)) .cse14) (or .cse40 (forall ((v_ArrVal_426 Int)) (= (let ((.cse45 (store .cse38 .cse24 v_ArrVal_426))) (let ((.cse42 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse45))) (let ((.cse43 (select .cse42 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse41 (select .cse43 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse44 (select .cse45 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse41 (select (select (store .cse42 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse43 .cse17 (+ .cse41 .cse44))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20) .cse44))))) 25)))))))) (not .cse13))))) (or (< |c_ULTIMATE.start_main_~i~0#1| 2) (and (or (forall ((v_ArrVal_426 Int)) (= 25 (let ((.cse51 (store .cse11 .cse22 v_ArrVal_426))) (let ((.cse48 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse51))) (let ((.cse49 (select .cse48 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse47 (select .cse51 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse50 (select .cse49 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse47 (select (select (store .cse48 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse49 .cse17 (+ .cse47 .cse50))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20) .cse50))))))) .cse25) (or (forall ((v_ArrVal_426 Int)) (= (let ((.cse56 (store .cse11 .cse5 v_ArrVal_426))) (let ((.cse54 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse56))) (let ((.cse55 (select .cse54 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse52 (select .cse56 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse53 (select .cse55 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse52 .cse53 (select (select (store .cse54 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse55 .cse17 (+ .cse52 .cse53))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20)))))) 25)) .cse32))) (or .cse12 (and (or (forall ((v_ArrVal_426 Int)) (= (let ((.cse61 (store .cse11 .cse24 v_ArrVal_426))) (let ((.cse59 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse61))) (let ((.cse60 (select .cse59 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse57 (select .cse60 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse58 (select .cse61 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse57 .cse58 (select (select (store .cse59 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse60 .cse17 (+ .cse57 .cse58))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20)))))) 25)) .cse40) (or (forall ((v_ArrVal_426 Int)) (= (let ((.cse66 (store .cse11 .cse39 v_ArrVal_426))) (let ((.cse62 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse66))) (let ((.cse63 (select .cse62 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse64 (select .cse63 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse65 (select .cse66 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse62 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse63 .cse17 (+ .cse64 .cse65))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse20) .cse64 .cse65))))) 25)) .cse14))) (or (= (select .cse9 .cse3) 25) .cse0 .cse1) (or (not .cse8) (let ((.cse70 (mod .cse71 4294967296))) (let ((.cse69 (<= .cse70 2147483647)) (.cse68 (* 8 .cse70)) (.cse67 (+ (* (* |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~i~0#1|) 4) 25 (* 20 |c_ULTIMATE.start_main_~i~0#1|)))) (and (or (= .cse67 (select .cse9 (+ .cse68 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|))) .cse69) (or (not .cse69) (= (select .cse9 (+ .cse68 |c_ULTIMATE.start_main_~b~0#1.offset|)) .cse67))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0))))))) is different from true [2023-02-14 22:12:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:12:15,352 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2023-02-14 22:12:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 22:12:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 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 28 [2023-02-14 22:12:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:12:15,353 INFO L225 Difference]: With dead ends: 96 [2023-02-14 22:12:15,353 INFO L226 Difference]: Without dead ends: 70 [2023-02-14 22:12:15,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 194.2s TimeCoverageRelationStatistics Valid=919, Invalid=3505, Unknown=2, NotChecked=130, Total=4556 [2023-02-14 22:12:15,354 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 175 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 134 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-02-14 22:12:15,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 134 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 334 Invalid, 3 Unknown, 24 Unchecked, 12.6s Time] [2023-02-14 22:12:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-14 22:12:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2023-02-14 22:12:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 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) [2023-02-14 22:12:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-02-14 22:12:15,364 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2023-02-14 22:12:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:12:15,364 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-02-14 22:12:15,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 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) [2023-02-14 22:12:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-02-14 22:12:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:12:15,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:12:15,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:12:15,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 22:12:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 22:12:15,572 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:12:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:12:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 4 times [2023-02-14 22:12:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:12:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148301561] [2023-02-14 22:12:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:12:15,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:12:15,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 22:12:15,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978379412] [2023-02-14 22:12:15,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 22:12:15,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:12:15,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:12:15,591 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:12:15,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 22:12:16,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 22:12:16,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:12:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-14 22:12:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:12:16,038 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-14 22:12:16,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-02-14 22:12:16,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2023-02-14 22:12:16,070 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-02-14 22:12:16,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2023-02-14 22:12:16,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:12:16,125 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:12:16,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 83 [2023-02-14 22:12:16,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 52 [2023-02-14 22:12:16,219 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:12:16,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:12:16,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2023-02-14 22:12:16,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-14 22:12:16,407 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:12:16,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 139 [2023-02-14 22:12:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:12:16,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2023-02-14 22:12:16,425 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:12:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 132 [2023-02-14 22:12:16,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 17 [2023-02-14 22:12:16,574 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:12:16,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2023-02-14 22:12:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 182 [2023-02-14 22:12:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,735 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 22:12:16,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 58 [2023-02-14 22:12:16,916 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:12:16,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 156 [2023-02-14 22:12:16,933 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:12:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:16,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2023-02-14 22:12:17,219 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 22:12:17,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 212 treesize of output 186 [2023-02-14 22:12:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 235 [2023-02-14 22:12:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 164 [2023-02-14 22:12:17,555 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:12:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,563 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:12:17,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:12:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:12:17,589 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-02-14 22:12:17,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 97 treesize of output 90 [2023-02-14 22:12:18,010 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-02-14 22:12:18,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 50 [2023-02-14 22:12:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:12:18,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:12:33,934 WARN L233 SmtUtils]: Spent 8.65s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:12:44,644 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:12:55,653 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 22:13:09,016 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)