./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:04:40,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:04:40,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:04:40,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:04:40,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:04:40,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:04:40,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:04:40,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:04:40,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:04:40,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:04:40,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:04:40,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:04:40,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:04:40,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:04:40,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:04:40,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:04:40,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:04:40,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:04:40,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:04:40,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:04:40,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:04:40,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:04:40,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:04:40,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:04:40,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:04:40,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:04:40,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:04:40,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:04:40,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:04:40,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:04:40,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:04:40,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:04:40,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:04:40,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:04:40,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:04:40,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:04:40,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:04:40,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:04:40,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:04:40,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:04:40,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:04:40,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:04:40,942 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:04:40,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:04:40,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:04:40,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:04:40,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:04:40,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:04:40,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:04:40,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:04:40,945 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:04:40,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:04:40,946 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:04:40,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:04:40,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:04:40,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:04:40,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:04:40,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:04:40,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:04:40,947 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:04:40,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:04:40,947 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:04:40,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:04:40,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:04:40,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:04:40,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:04:40,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:04:40,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:04:40,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:04:40,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:04:40,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:04:40,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:04:40,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:04:40,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:04:40,950 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:04:40,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:04:40,951 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:04:40,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 [2023-02-15 09:04:41,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:04:41,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:04:41,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:04:41,230 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:04:41,230 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:04:41,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2023-02-15 09:04:42,449 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:04:42,639 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:04:42,640 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2023-02-15 09:04:42,645 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0904ce9a9/8fcf5c545fcb4f5cab37c3b3ba5704e9/FLAG1f2459fdd [2023-02-15 09:04:42,656 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0904ce9a9/8fcf5c545fcb4f5cab37c3b3ba5704e9 [2023-02-15 09:04:42,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:04:42,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:04:42,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:04:42,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:04:42,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:04:42,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@148fa875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42, skipping insertion in model container [2023-02-15 09:04:42,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:04:42,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:04:42,824 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2023-02-15 09:04:42,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:04:42,866 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:04:42,877 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2023-02-15 09:04:42,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:04:42,904 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:04:42,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42 WrapperNode [2023-02-15 09:04:42,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:04:42,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:04:42,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:04:42,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:04:42,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,933 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2023-02-15 09:04:42,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:04:42,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:04:42,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:04:42,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:04:42,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,955 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:04:42,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:04:42,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:04:42,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:04:42,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:04:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:43,058 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) [2023-02-15 09:04:43,069 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 [2023-02-15 09:04:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:04:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:04:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:04:43,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:04:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:04:43,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:04:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:04:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 09:04:43,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 09:04:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:04:43,159 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:04:43,161 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:04:43,317 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:04:43,322 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:04:43,323 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2023-02-15 09:04:43,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:43 BoogieIcfgContainer [2023-02-15 09:04:43,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:04:43,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:04:43,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:04:43,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:04:43,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:04:42" (1/3) ... [2023-02-15 09:04:43,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a59ae5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:43, skipping insertion in model container [2023-02-15 09:04:43,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (2/3) ... [2023-02-15 09:04:43,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a59ae5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:43, skipping insertion in model container [2023-02-15 09:04:43,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:43" (3/3) ... [2023-02-15 09:04:43,354 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2023-02-15 09:04:43,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:04:43,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:04:43,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:04:43,471 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;@4712d110, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:04:43,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:04:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:04:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 09:04:43,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:43,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:43,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2023-02-15 09:04:43,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602093630] [2023-02-15 09:04:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:04:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602093630] [2023-02-15 09:04:43,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602093630] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:43,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:04:43,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:04:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966195855] [2023-02-15 09:04:43,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:43,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:04:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:04:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:04:43,761 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:43,816 INFO L93 Difference]: Finished difference Result 78 states and 121 transitions. [2023-02-15 09:04:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:04:43,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 09:04:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:43,824 INFO L225 Difference]: With dead ends: 78 [2023-02-15 09:04:43,824 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 09:04:43,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:04:43,830 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:43,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 09:04:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-02-15 09:04:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:04:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-02-15 09:04:43,867 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 12 [2023-02-15 09:04:43,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:43,868 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-02-15 09:04:43,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-02-15 09:04:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 09:04:43,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:43,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:43,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:04:43,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash -326095532, now seen corresponding path program 1 times [2023-02-15 09:04:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010590916] [2023-02-15 09:04:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:04:43,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:43,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010590916] [2023-02-15 09:04:43,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010590916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:43,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524411110] [2023-02-15 09:04:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:43,957 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) [2023-02-15 09:04:43,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:04:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 09:04:44,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:04:44,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:04:44,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524411110] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:44,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:04:44,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 09:04:44,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345518324] [2023-02-15 09:04:44,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:44,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:04:44,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:04:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:04:44,102 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:44,168 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2023-02-15 09:04:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:04:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 09:04:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:44,170 INFO L225 Difference]: With dead ends: 68 [2023-02-15 09:04:44,170 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 09:04:44,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:04:44,172 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:44,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 70 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 09:04:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2023-02-15 09:04:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:04:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-15 09:04:44,194 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 14 [2023-02-15 09:04:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:44,195 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-15 09:04:44,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-15 09:04:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 09:04:44,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:44,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:44,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:04:44,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:44,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:44,407 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2023-02-15 09:04:44,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:44,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115189249] [2023-02-15 09:04:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:04:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:44,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115189249] [2023-02-15 09:04:44,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115189249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:44,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901387719] [2023-02-15 09:04:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:44,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:44,501 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) [2023-02-15 09:04:44,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:04:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:04:44,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:04:44,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:04:44,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901387719] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:44,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:44,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:04:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791909558] [2023-02-15 09:04:44,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:44,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:04:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:04:44,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:04:44,634 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:44,655 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2023-02-15 09:04:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:04:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 09:04:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:44,656 INFO L225 Difference]: With dead ends: 77 [2023-02-15 09:04:44,656 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 09:04:44,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:04:44,658 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:44,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 09:04:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 09:04:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:04:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-02-15 09:04:44,664 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 16 [2023-02-15 09:04:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:44,665 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-02-15 09:04:44,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-02-15 09:04:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 09:04:44,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:44,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:44,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:44,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 09:04:44,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1414516411, now seen corresponding path program 2 times [2023-02-15 09:04:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:44,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224902688] [2023-02-15 09:04:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:04:44,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224902688] [2023-02-15 09:04:44,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224902688] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:44,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:04:44,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:04:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118024377] [2023-02-15 09:04:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:04:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:04:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:04:45,004 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:45,085 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2023-02-15 09:04:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:04:45,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 09:04:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:45,088 INFO L225 Difference]: With dead ends: 95 [2023-02-15 09:04:45,089 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 09:04:45,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:04:45,091 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:45,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 78 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:04:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 09:04:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2023-02-15 09:04:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:04:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-02-15 09:04:45,105 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 22 [2023-02-15 09:04:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-02-15 09:04:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-02-15 09:04:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 09:04:45,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:45,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:45,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 09:04:45,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2023-02-15 09:04:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786395479] [2023-02-15 09:04:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 09:04:45,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:45,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786395479] [2023-02-15 09:04:45,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786395479] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:45,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:04:45,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:04:45,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920663078] [2023-02-15 09:04:45,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:45,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:04:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:04:45,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:04:45,223 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:45,262 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2023-02-15 09:04:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:04:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 09:04:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:45,264 INFO L225 Difference]: With dead ends: 92 [2023-02-15 09:04:45,264 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 09:04:45,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:04:45,265 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:45,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 81 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 09:04:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-02-15 09:04:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:04:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-02-15 09:04:45,273 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2023-02-15 09:04:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:45,273 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-02-15 09:04:45,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-02-15 09:04:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 09:04:45,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:45,274 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:45,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 09:04:45,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -581508620, now seen corresponding path program 1 times [2023-02-15 09:04:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:45,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330191823] [2023-02-15 09:04:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:45,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:04:45,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330191823] [2023-02-15 09:04:45,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330191823] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325219793] [2023-02-15 09:04:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:45,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:45,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:45,360 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) [2023-02-15 09:04:45,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:04:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:04:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:04:45,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:04:45,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325219793] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:45,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:45,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 09:04:45,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319941893] [2023-02-15 09:04:45,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:45,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 09:04:45,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 09:04:45,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:04:45,540 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:45,581 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2023-02-15 09:04:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:04:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 09:04:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:45,583 INFO L225 Difference]: With dead ends: 107 [2023-02-15 09:04:45,584 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 09:04:45,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:04:45,585 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:45,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 09:04:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-15 09:04:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:04:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-02-15 09:04:45,602 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 26 [2023-02-15 09:04:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:45,602 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-02-15 09:04:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-02-15 09:04:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 09:04:45,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:45,603 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:45,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:45,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:45,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash -772621952, now seen corresponding path program 2 times [2023-02-15 09:04:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:45,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220734523] [2023-02-15 09:04:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:45,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:04:46,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:46,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220734523] [2023-02-15 09:04:46,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220734523] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:46,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854769225] [2023-02-15 09:04:46,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:04:46,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:46,034 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) [2023-02-15 09:04:46,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:04:46,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 09:04:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:46,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 09:04:46,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:46,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 09:04:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-15 09:04:46,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:04:46,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854769225] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:46,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:04:46,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-02-15 09:04:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886676717] [2023-02-15 09:04:46,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:46,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 09:04:46,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 09:04:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:04:46,305 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:46,432 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2023-02-15 09:04:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 09:04:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-15 09:04:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:46,435 INFO L225 Difference]: With dead ends: 79 [2023-02-15 09:04:46,435 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 09:04:46,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-02-15 09:04:46,437 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:46,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 164 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:04:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 09:04:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2023-02-15 09:04:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:04:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2023-02-15 09:04:46,453 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2023-02-15 09:04:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:46,454 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2023-02-15 09:04:46,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2023-02-15 09:04:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 09:04:46,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:46,462 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:46,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:46,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash -602796711, now seen corresponding path program 1 times [2023-02-15 09:04:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:46,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523606939] [2023-02-15 09:04:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:46,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:46,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-15 09:04:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:04:46,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523606939] [2023-02-15 09:04:46,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523606939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288087306] [2023-02-15 09:04:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:46,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:46,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:46,898 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) [2023-02-15 09:04:46,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:04:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:04:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:04:47,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:04:47,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288087306] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:47,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:47,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 09:04:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981079151] [2023-02-15 09:04:47,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 09:04:47,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 09:04:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:04:47,218 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:47,286 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2023-02-15 09:04:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:04:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-02-15 09:04:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:47,288 INFO L225 Difference]: With dead ends: 141 [2023-02-15 09:04:47,288 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 09:04:47,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:04:47,290 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:47,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 174 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 09:04:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-02-15 09:04:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:04:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2023-02-15 09:04:47,299 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 46 [2023-02-15 09:04:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:47,299 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2023-02-15 09:04:47,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2023-02-15 09:04:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 09:04:47,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:47,300 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:47,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 09:04:47,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:47,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1736618383, now seen corresponding path program 2 times [2023-02-15 09:04:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:47,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709186140] [2023-02-15 09:04:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-02-15 09:04:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:04:48,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:48,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709186140] [2023-02-15 09:04:48,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709186140] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:48,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062252195] [2023-02-15 09:04:48,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:04:48,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:48,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:48,018 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) [2023-02-15 09:04:48,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:04:48,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:04:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 09:04:48,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:04:48,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:04:48,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062252195] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:48,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:48,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-15 09:04:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593779396] [2023-02-15 09:04:48,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:48,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 09:04:48,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 09:04:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 09:04:48,899 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:49,027 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2023-02-15 09:04:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 09:04:49,028 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2023-02-15 09:04:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:49,029 INFO L225 Difference]: With dead ends: 189 [2023-02-15 09:04:49,029 INFO L226 Difference]: Without dead ends: 142 [2023-02-15 09:04:49,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 09:04:49,031 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:49,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 260 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:04:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-15 09:04:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-02-15 09:04:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 136 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:04:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2023-02-15 09:04:49,041 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 70 [2023-02-15 09:04:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:49,042 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2023-02-15 09:04:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2023-02-15 09:04:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-15 09:04:49,043 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:49,043 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:49,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:49,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:49,256 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:49,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:49,256 INFO L85 PathProgramCache]: Analyzing trace with hash 728266913, now seen corresponding path program 3 times [2023-02-15 09:04:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:49,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441754077] [2023-02-15 09:04:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-02-15 09:04:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:04:51,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441754077] [2023-02-15 09:04:51,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441754077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987201687] [2023-02-15 09:04:51,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:04:51,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:51,028 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) [2023-02-15 09:04:51,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:04:51,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 09:04:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:04:51,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2023-02-15 09:04:51,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2023-02-15 09:04:51,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987201687] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:51,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:51,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2023-02-15 09:04:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390592670] [2023-02-15 09:04:51,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 09:04:51,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 09:04:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 09:04:51,244 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:51,478 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2023-02-15 09:04:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 09:04:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2023-02-15 09:04:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:51,482 INFO L225 Difference]: With dead ends: 218 [2023-02-15 09:04:51,482 INFO L226 Difference]: Without dead ends: 171 [2023-02-15 09:04:51,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 09:04:51,486 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:51,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 344 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:04:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-15 09:04:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2023-02-15 09:04:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 146 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:04:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2023-02-15 09:04:51,502 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 118 [2023-02-15 09:04:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:51,503 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2023-02-15 09:04:51,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2023-02-15 09:04:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 09:04:51,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:51,506 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:51,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:51,711 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -870454239, now seen corresponding path program 1 times [2023-02-15 09:04:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:51,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533119698] [2023-02-15 09:04:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:53,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-15 09:04:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:04:53,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533119698] [2023-02-15 09:04:53,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533119698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832347322] [2023-02-15 09:04:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:53,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:53,361 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) [2023-02-15 09:04:53,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:04:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 09:04:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:04:53,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:04:56,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832347322] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:56,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:56,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-02-15 09:04:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237407486] [2023-02-15 09:04:56,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:56,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-02-15 09:04:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-02-15 09:04:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-02-15 09:04:56,017 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:56,275 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2023-02-15 09:04:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-15 09:04:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2023-02-15 09:04:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:56,278 INFO L225 Difference]: With dead ends: 305 [2023-02-15 09:04:56,278 INFO L226 Difference]: Without dead ends: 250 [2023-02-15 09:04:56,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-02-15 09:04:56,281 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:56,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 303 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:04:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-15 09:04:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2023-02-15 09:04:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 243 states have (on average 1.0699588477366255) internal successors, (260), 244 states have internal predecessors, (260), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:04:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 268 transitions. [2023-02-15 09:04:56,292 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 268 transitions. Word has length 120 [2023-02-15 09:04:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:56,293 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 268 transitions. [2023-02-15 09:04:56,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:04:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 268 transitions. [2023-02-15 09:04:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-02-15 09:04:56,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:56,295 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:56,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:56,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 09:04:56,508 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1106180221, now seen corresponding path program 2 times [2023-02-15 09:04:56,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:56,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708162857] [2023-02-15 09:04:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:56,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:01,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2023-02-15 09:05:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:05:01,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708162857] [2023-02-15 09:05:01,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708162857] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818585740] [2023-02-15 09:05:01,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:05:01,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:01,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:01,992 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) [2023-02-15 09:05:01,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:05:02,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:05:02,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:05:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 09:05:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:05:02,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:05:11,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818585740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:11,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:11,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2023-02-15 09:05:11,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80719756] [2023-02-15 09:05:11,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:11,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-02-15 09:05:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-02-15 09:05:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-02-15 09:05:11,288 INFO L87 Difference]: Start difference. First operand 250 states and 268 transitions. Second operand has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:05:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:11,984 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2023-02-15 09:05:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-02-15 09:05:11,985 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2023-02-15 09:05:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:11,986 INFO L225 Difference]: With dead ends: 501 [2023-02-15 09:05:11,987 INFO L226 Difference]: Without dead ends: 446 [2023-02-15 09:05:11,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-02-15 09:05:11,990 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:11,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 174 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:05:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-02-15 09:05:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-02-15 09:05:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 439 states have (on average 1.0387243735763099) internal successors, (456), 440 states have internal predecessors, (456), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:05:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 464 transitions. [2023-02-15 09:05:12,007 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 464 transitions. Word has length 218 [2023-02-15 09:05:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:12,007 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 464 transitions. [2023-02-15 09:05:12,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:05:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 464 transitions. [2023-02-15 09:05:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-02-15 09:05:12,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:12,014 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:12,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 09:05:12,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:12,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1565186873, now seen corresponding path program 3 times [2023-02-15 09:05:12,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:12,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118755574] [2023-02-15 09:05:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2023-02-15 09:05:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 37636 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:05:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118755574] [2023-02-15 09:05:30,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118755574] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823571346] [2023-02-15 09:05:30,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:05:30,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:30,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:30,928 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) [2023-02-15 09:05:30,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:05:31,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 09:05:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:05:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:05:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37640 trivial. 0 not checked. [2023-02-15 09:05:31,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 37638 trivial. 0 not checked. [2023-02-15 09:05:31,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823571346] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:31,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:31,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2023-02-15 09:05:31,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269969336] [2023-02-15 09:05:31,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:31,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-15 09:05:31,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-15 09:05:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2023-02-15 09:05:31,604 INFO L87 Difference]: Start difference. First operand 446 states and 464 transitions. Second operand has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:05:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:45,780 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2023-02-15 09:05:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2023-02-15 09:05:45,781 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 414 [2023-02-15 09:05:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:45,783 INFO L225 Difference]: With dead ends: 554 [2023-02-15 09:05:45,783 INFO L226 Difference]: Without dead ends: 499 [2023-02-15 09:05:45,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2023-02-15 09:05:45,794 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 888 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:45,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 240 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 09:05:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-02-15 09:05:45,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2023-02-15 09:05:45,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 469 states have (on average 1.0511727078891258) internal successors, (493), 470 states have internal predecessors, (493), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:05:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 503 transitions. [2023-02-15 09:05:45,812 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 503 transitions. Word has length 414 [2023-02-15 09:05:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:45,813 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 503 transitions. [2023-02-15 09:05:45,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:05:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 503 transitions. [2023-02-15 09:05:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-02-15 09:05:45,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:45,819 INFO L195 NwaCegarLoop]: trace histogram [195, 195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:45,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:05:46,024 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,SelfDestructingSolverStorable12 [2023-02-15 09:05:46,025 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:46,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1055751507, now seen corresponding path program 4 times [2023-02-15 09:05:46,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:46,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600082222] [2023-02-15 09:05:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:06:04,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2023-02-15 09:06:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:06:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:06:04,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:06:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600082222] [2023-02-15 09:06:04,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600082222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:06:04,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894060294] [2023-02-15 09:06:04,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:06:04,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:06:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:06:04,180 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) [2023-02-15 09:06:04,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:06:04,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:06:04,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:06:04,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 197 conjunts are in the unsatisfiable core [2023-02-15 09:06:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:06:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 0 proven. 38025 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 09:06:05,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:06:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:06:40,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894060294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:06:40,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:06:40,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198, 198] total 395 [2023-02-15 09:06:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358471565] [2023-02-15 09:06:40,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:06:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-02-15 09:06:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:06:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-02-15 09:06:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-02-15 09:06:40,365 INFO L87 Difference]: Start difference. First operand 477 states and 503 transitions. Second operand has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:06:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:06:43,921 INFO L93 Difference]: Finished difference Result 955 states and 1203 transitions. [2023-02-15 09:06:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-02-15 09:06:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 425 [2023-02-15 09:06:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:06:43,925 INFO L225 Difference]: With dead ends: 955 [2023-02-15 09:06:43,925 INFO L226 Difference]: Without dead ends: 871 [2023-02-15 09:06:43,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-02-15 09:06:43,932 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 09:06:43,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 561 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 09:06:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-02-15 09:06:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2023-02-15 09:06:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 863 states have (on average 1.0278099652375434) internal successors, (887), 864 states have internal predecessors, (887), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:06:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 897 transitions. [2023-02-15 09:06:43,962 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 897 transitions. Word has length 425 [2023-02-15 09:06:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:06:43,962 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 897 transitions. [2023-02-15 09:06:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:06:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 897 transitions. [2023-02-15 09:06:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2023-02-15 09:06:43,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:06:43,969 INFO L195 NwaCegarLoop]: trace histogram [392, 392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:06:43,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 09:06:44,169 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,SelfDestructingSolverStorable13 [2023-02-15 09:06:44,169 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:06:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:06:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2116101367, now seen corresponding path program 5 times [2023-02-15 09:06:44,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:06:44,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922266841] [2023-02-15 09:06:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:06:44,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:06:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:08:08,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 807 [2023-02-15 09:08:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:08:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 153690 backedges. 2 proven. 153664 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:08:08,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:08:08,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922266841] [2023-02-15 09:08:08,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922266841] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:08:08,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099577371] [2023-02-15 09:08:08,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:08:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:08:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:08:08,266 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) [2023-02-15 09:08:08,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process