./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem16_label51.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b074fce96d6429d22c86c96a12ef3525cb358d932fbb69fef81fea7f3a374149 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:56:15,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:56:15,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:56:15,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:56:15,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:56:15,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:56:15,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:56:15,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:56:15,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:56:15,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:56:15,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:56:15,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:56:15,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:56:15,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:56:15,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:56:15,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:56:15,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:56:15,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:56:15,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:56:15,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:56:15,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:56:15,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:56:15,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:56:15,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:56:15,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:56:15,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:56:15,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:56:15,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:56:15,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:56:15,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:56:15,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:56:15,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:56:15,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:56:15,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:56:15,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:56:15,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:56:15,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:56:15,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:56:15,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:56:15,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:56:15,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:56:15,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:56:15,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:56:15,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:56:15,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:56:15,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:56:15,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:56:15,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:56:15,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:56:15,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:56:15,917 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:56:15,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:56:15,918 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:56:15,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:56:15,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:56:15,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:56:15,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:56:15,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:56:15,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:56:15,919 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:56:15,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:56:15,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:56:15,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:56:15,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:56:15,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:56:15,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:56:15,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:56:15,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:56:15,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:56:15,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:56:15,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:56:15,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:56:15,921 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:56:15,921 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:56:15,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:56:15,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:56:15,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b074fce96d6429d22c86c96a12ef3525cb358d932fbb69fef81fea7f3a374149 [2021-12-15 09:56:16,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:56:16,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:56:16,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:56:16,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:56:16,118 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:56:16,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label51.c [2021-12-15 09:56:16,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56001516/8109883bee84420a9d1aefaad144b441/FLAGbee55b915 [2021-12-15 09:56:16,633 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:56:16,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label51.c [2021-12-15 09:56:16,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56001516/8109883bee84420a9d1aefaad144b441/FLAGbee55b915 [2021-12-15 09:56:16,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56001516/8109883bee84420a9d1aefaad144b441 [2021-12-15 09:56:16,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:56:16,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:56:16,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:56:16,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:56:16,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:56:16,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:56:16" (1/1) ... [2021-12-15 09:56:16,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58cdf930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:16, skipping insertion in model container [2021-12-15 09:56:16,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:56:16" (1/1) ... [2021-12-15 09:56:16,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:56:17,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:56:17,199 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label51.c[1726,1739] [2021-12-15 09:56:17,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:56:17,482 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:56:17,502 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label51.c[1726,1739] [2021-12-15 09:56:17,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:56:17,633 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:56:17,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17 WrapperNode [2021-12-15 09:56:17,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:56:17,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:56:17,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:56:17,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:56:17,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,729 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-15 09:56:17,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:56:17,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:56:17,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:56:17,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:56:17,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:56:17,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:56:17,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:56:17,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:56:17,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (1/1) ... [2021-12-15 09:56:17,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:56:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:17,891 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) [2021-12-15 09:56:17,897 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 [2021-12-15 09:56:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:56:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:56:17,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:56:17,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:56:17,962 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:56:17,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:56:19,471 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:56:19,485 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:56:19,485 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:56:19,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:56:19 BoogieIcfgContainer [2021-12-15 09:56:19,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:56:19,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:56:19,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:56:19,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:56:19,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:56:16" (1/3) ... [2021-12-15 09:56:19,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d271c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:56:19, skipping insertion in model container [2021-12-15 09:56:19,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:17" (2/3) ... [2021-12-15 09:56:19,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d271c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:56:19, skipping insertion in model container [2021-12-15 09:56:19,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:56:19" (3/3) ... [2021-12-15 09:56:19,494 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label51.c [2021-12-15 09:56:19,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:56:19,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:56:19,538 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:56:19,543 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:56:19,549 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:56:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 09:56:19,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:19,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:19,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1414013846, now seen corresponding path program 1 times [2021-12-15 09:56:19,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:19,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517601947] [2021-12-15 09:56:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:19,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:56:19,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517601947] [2021-12-15 09:56:19,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517601947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:19,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:19,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:56:19,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504429893] [2021-12-15 09:56:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:19,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:19,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:19,735 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:21,050 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-15 09:56:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 09:56:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:21,069 INFO L225 Difference]: With dead ends: 1122 [2021-12-15 09:56:21,071 INFO L226 Difference]: Without dead ends: 662 [2021-12-15 09:56:21,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:21,080 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 346 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:21,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 223 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:56:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-15 09:56:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-15 09:56:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5824508320726172) internal successors, (1046), 661 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1046 transitions. [2021-12-15 09:56:21,138 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1046 transitions. Word has length 14 [2021-12-15 09:56:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:21,139 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1046 transitions. [2021-12-15 09:56:21,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1046 transitions. [2021-12-15 09:56:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-15 09:56:21,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:21,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:21,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:56:21,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash -820209631, now seen corresponding path program 1 times [2021-12-15 09:56:21,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:21,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019613836] [2021-12-15 09:56:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:21,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:56:21,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019613836] [2021-12-15 09:56:21,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019613836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:21,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:21,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:56:21,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954918778] [2021-12-15 09:56:21,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:21,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:21,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:21,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:21,239 INFO L87 Difference]: Start difference. First operand 662 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:22,256 INFO L93 Difference]: Finished difference Result 1980 states and 3133 transitions. [2021-12-15 09:56:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-15 09:56:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:22,261 INFO L225 Difference]: With dead ends: 1980 [2021-12-15 09:56:22,261 INFO L226 Difference]: Without dead ends: 1320 [2021-12-15 09:56:22,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:22,263 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 298 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:22,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 199 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:56:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-15 09:56:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-15 09:56:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.3737680060652009) internal successors, (1812), 1319 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1812 transitions. [2021-12-15 09:56:22,283 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1812 transitions. Word has length 85 [2021-12-15 09:56:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:22,283 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1812 transitions. [2021-12-15 09:56:22,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1812 transitions. [2021-12-15 09:56:22,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-15 09:56:22,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:22,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:22,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:56:22,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:22,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:22,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1052125747, now seen corresponding path program 1 times [2021-12-15 09:56:22,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:22,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306223383] [2021-12-15 09:56:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:22,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:56:22,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:22,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306223383] [2021-12-15 09:56:22,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306223383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:22,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:22,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:22,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277140932] [2021-12-15 09:56:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:22,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:22,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:22,384 INFO L87 Difference]: Start difference. First operand 1320 states and 1812 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:23,338 INFO L93 Difference]: Finished difference Result 3296 states and 4623 transitions. [2021-12-15 09:56:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:23,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-15 09:56:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:23,344 INFO L225 Difference]: With dead ends: 3296 [2021-12-15 09:56:23,344 INFO L226 Difference]: Without dead ends: 1978 [2021-12-15 09:56:23,346 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:56:23,346 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 314 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:23,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 539 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:56:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-15 09:56:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-15 09:56:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2918563480020233) internal successors, (2554), 1977 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2554 transitions. [2021-12-15 09:56:23,379 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2554 transitions. Word has length 169 [2021-12-15 09:56:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:23,380 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2554 transitions. [2021-12-15 09:56:23,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2554 transitions. [2021-12-15 09:56:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-12-15 09:56:23,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:23,384 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:23,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:56:23,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1166653779, now seen corresponding path program 1 times [2021-12-15 09:56:23,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:23,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792554977] [2021-12-15 09:56:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:23,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-15 09:56:23,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792554977] [2021-12-15 09:56:23,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792554977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:23,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:23,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:56:23,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293313132] [2021-12-15 09:56:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:23,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:23,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:23,541 INFO L87 Difference]: Start difference. First operand 1978 states and 2554 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:24,555 INFO L93 Difference]: Finished difference Result 5270 states and 6849 transitions. [2021-12-15 09:56:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:24,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2021-12-15 09:56:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:24,562 INFO L225 Difference]: With dead ends: 5270 [2021-12-15 09:56:24,562 INFO L226 Difference]: Without dead ends: 2636 [2021-12-15 09:56:24,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:24,567 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 359 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:24,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 155 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:56:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-12-15 09:56:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2307. [2021-12-15 09:56:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.1014744145706852) internal successors, (2540), 2306 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2540 transitions. [2021-12-15 09:56:24,599 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2540 transitions. Word has length 354 [2021-12-15 09:56:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:24,600 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2540 transitions. [2021-12-15 09:56:24,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2540 transitions. [2021-12-15 09:56:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-15 09:56:24,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:24,603 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:24,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:56:24,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1885790206, now seen corresponding path program 1 times [2021-12-15 09:56:24,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:24,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722606418] [2021-12-15 09:56:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:24,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-12-15 09:56:24,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:24,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722606418] [2021-12-15 09:56:24,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722606418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:24,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:24,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:56:24,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000292159] [2021-12-15 09:56:24,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:24,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:24,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:24,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:24,727 INFO L87 Difference]: Start difference. First operand 2307 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:25,457 INFO L93 Difference]: Finished difference Result 6915 states and 7615 transitions. [2021-12-15 09:56:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-12-15 09:56:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:25,469 INFO L225 Difference]: With dead ends: 6915 [2021-12-15 09:56:25,469 INFO L226 Difference]: Without dead ends: 4610 [2021-12-15 09:56:25,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:25,473 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 239 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:25,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 57 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-12-15 09:56:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-12-15 09:56:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.090041223692775) internal successors, (5024), 4609 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5024 transitions. [2021-12-15 09:56:25,532 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5024 transitions. Word has length 395 [2021-12-15 09:56:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:25,533 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5024 transitions. [2021-12-15 09:56:25,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5024 transitions. [2021-12-15 09:56:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-12-15 09:56:25,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:25,542 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:25,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:56:25,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash -950515796, now seen corresponding path program 1 times [2021-12-15 09:56:25,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882614792] [2021-12-15 09:56:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:25,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-12-15 09:56:25,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:25,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882614792] [2021-12-15 09:56:25,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882614792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:25,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:25,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:25,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849717077] [2021-12-15 09:56:25,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:25,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:56:25,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:56:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:56:25,685 INFO L87 Difference]: Start difference. First operand 4610 states and 5024 transitions. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:26,488 INFO L93 Difference]: Finished difference Result 9591 states and 10426 transitions. [2021-12-15 09:56:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:56:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 496 [2021-12-15 09:56:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:26,500 INFO L225 Difference]: With dead ends: 9591 [2021-12-15 09:56:26,500 INFO L226 Difference]: Without dead ends: 4983 [2021-12-15 09:56:26,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:56:26,506 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 409 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:26,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 175 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:56:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-12-15 09:56:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 4939. [2021-12-15 09:56:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.0844471445929527) internal successors, (5355), 4938 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5355 transitions. [2021-12-15 09:56:26,570 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5355 transitions. Word has length 496 [2021-12-15 09:56:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:26,571 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 5355 transitions. [2021-12-15 09:56:26,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5355 transitions. [2021-12-15 09:56:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2021-12-15 09:56:26,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:26,580 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:26,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:56:26,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash 684021808, now seen corresponding path program 1 times [2021-12-15 09:56:26,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:26,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390682495] [2021-12-15 09:56:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:26,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 487 proven. 101 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-15 09:56:26,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:26,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390682495] [2021-12-15 09:56:26,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390682495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:26,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538868677] [2021-12-15 09:56:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:26,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:26,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:26,796 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) [2021-12-15 09:56:26,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:56:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:56:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 478 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-15 09:56:27,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:27,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538868677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:27,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:27,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 09:56:27,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888781700] [2021-12-15 09:56:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:27,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:27,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:27,826 INFO L87 Difference]: Start difference. First operand 4939 states and 5355 transitions. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 2 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:28,514 INFO L93 Difference]: Finished difference Result 10534 states and 11433 transitions. [2021-12-15 09:56:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 2 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 600 [2021-12-15 09:56:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:28,529 INFO L225 Difference]: With dead ends: 10534 [2021-12-15 09:56:28,529 INFO L226 Difference]: Without dead ends: 5926 [2021-12-15 09:56:28,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:28,534 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:28,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 31 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-12-15 09:56:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2021-12-15 09:56:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.0624472573839663) internal successors, (6295), 5925 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6295 transitions. [2021-12-15 09:56:28,606 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6295 transitions. Word has length 600 [2021-12-15 09:56:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:28,606 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6295 transitions. [2021-12-15 09:56:28,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 2 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6295 transitions. [2021-12-15 09:56:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2021-12-15 09:56:28,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:28,613 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:28,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:28,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:28,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1133631130, now seen corresponding path program 1 times [2021-12-15 09:56:28,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:28,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146623894] [2021-12-15 09:56:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:28,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 942 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-15 09:56:28,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:28,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146623894] [2021-12-15 09:56:28,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146623894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:28,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:28,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:28,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272180164] [2021-12-15 09:56:28,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:28,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:28,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:29,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:29,000 INFO L87 Difference]: Start difference. First operand 5926 states and 6295 transitions. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:29,693 INFO L93 Difference]: Finished difference Result 14482 states and 15488 transitions. [2021-12-15 09:56:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 725 [2021-12-15 09:56:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:29,725 INFO L225 Difference]: With dead ends: 14482 [2021-12-15 09:56:29,725 INFO L226 Difference]: Without dead ends: 8887 [2021-12-15 09:56:29,732 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:56:29,732 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:29,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 426 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-12-15 09:56:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8558. [2021-12-15 09:56:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 1.0490826224143976) internal successors, (8977), 8557 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 8977 transitions. [2021-12-15 09:56:29,881 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 8977 transitions. Word has length 725 [2021-12-15 09:56:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:29,883 INFO L470 AbstractCegarLoop]: Abstraction has 8558 states and 8977 transitions. [2021-12-15 09:56:29,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 8977 transitions. [2021-12-15 09:56:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2021-12-15 09:56:29,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:29,894 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:29,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:56:29,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1851349682, now seen corresponding path program 1 times [2021-12-15 09:56:29,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:29,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263141305] [2021-12-15 09:56:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:29,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 853 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-15 09:56:30,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:30,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263141305] [2021-12-15 09:56:30,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263141305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:30,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:30,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:30,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617769875] [2021-12-15 09:56:30,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:30,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:30,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:30,054 INFO L87 Difference]: Start difference. First operand 8558 states and 8977 transitions. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:30,740 INFO L93 Difference]: Finished difference Result 19746 states and 20838 transitions. [2021-12-15 09:56:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 817 [2021-12-15 09:56:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:30,754 INFO L225 Difference]: With dead ends: 19746 [2021-12-15 09:56:30,755 INFO L226 Difference]: Without dead ends: 11519 [2021-12-15 09:56:30,763 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:56:30,763 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 175 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:30,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 414 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-15 09:56:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10532. [2021-12-15 09:56:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 1.0460545057449435) internal successors, (11016), 10531 states have internal predecessors, (11016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 11016 transitions. [2021-12-15 09:56:30,859 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 11016 transitions. Word has length 817 [2021-12-15 09:56:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:30,860 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 11016 transitions. [2021-12-15 09:56:30,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 11016 transitions. [2021-12-15 09:56:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1202 [2021-12-15 09:56:30,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:30,875 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:30,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:56:30,875 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1823007321, now seen corresponding path program 1 times [2021-12-15 09:56:30,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:30,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648023525] [2021-12-15 09:56:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:30,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 1895 proven. 0 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2021-12-15 09:56:31,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648023525] [2021-12-15 09:56:31,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648023525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:31,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:31,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:31,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942141386] [2021-12-15 09:56:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:31,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:31,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:31,168 INFO L87 Difference]: Start difference. First operand 10532 states and 11016 transitions. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:31,890 INFO L93 Difference]: Finished difference Result 23694 states and 24929 transitions. [2021-12-15 09:56:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1201 [2021-12-15 09:56:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:31,909 INFO L225 Difference]: With dead ends: 23694 [2021-12-15 09:56:31,909 INFO L226 Difference]: Without dead ends: 13493 [2021-12-15 09:56:31,919 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:56:31,920 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 221 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:31,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 432 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-12-15 09:56:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 12835. [2021-12-15 09:56:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0409069658719028) internal successors, (13359), 12834 states have internal predecessors, (13359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13359 transitions. [2021-12-15 09:56:32,038 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13359 transitions. Word has length 1201 [2021-12-15 09:56:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:32,039 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13359 transitions. [2021-12-15 09:56:32,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13359 transitions. [2021-12-15 09:56:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1203 [2021-12-15 09:56:32,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:32,076 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:32,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:56:32,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -119897642, now seen corresponding path program 1 times [2021-12-15 09:56:32,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:32,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736722755] [2021-12-15 09:56:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:32,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2691 backedges. 878 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2021-12-15 09:56:32,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:32,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736722755] [2021-12-15 09:56:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736722755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:32,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:32,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:32,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377256474] [2021-12-15 09:56:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:32,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:32,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:32,416 INFO L87 Difference]: Start difference. First operand 12835 states and 13359 transitions. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:33,101 INFO L93 Difference]: Finished difference Result 27642 states and 28796 transitions. [2021-12-15 09:56:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:33,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1202 [2021-12-15 09:56:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:33,116 INFO L225 Difference]: With dead ends: 27642 [2021-12-15 09:56:33,117 INFO L226 Difference]: Without dead ends: 13493 [2021-12-15 09:56:33,125 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:56:33,126 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 170 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:33,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 412 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-12-15 09:56:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 11519. [2021-12-15 09:56:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0312554262892863) internal successors, (11878), 11518 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11878 transitions. [2021-12-15 09:56:33,241 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11878 transitions. Word has length 1202 [2021-12-15 09:56:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:33,242 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 11878 transitions. [2021-12-15 09:56:33,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11878 transitions. [2021-12-15 09:56:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2021-12-15 09:56:33,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:33,259 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:33,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:56:33,260 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash -150499156, now seen corresponding path program 1 times [2021-12-15 09:56:33,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:33,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101478989] [2021-12-15 09:56:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:33,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 1947 proven. 0 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2021-12-15 09:56:33,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:33,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101478989] [2021-12-15 09:56:33,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101478989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:33,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:33,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:33,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617595130] [2021-12-15 09:56:33,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:33,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:33,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:33,567 INFO L87 Difference]: Start difference. First operand 11519 states and 11878 transitions. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:34,233 INFO L93 Difference]: Finished difference Result 22707 states and 23423 transitions. [2021-12-15 09:56:34,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:34,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1239 [2021-12-15 09:56:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:34,275 INFO L225 Difference]: With dead ends: 22707 [2021-12-15 09:56:34,276 INFO L226 Difference]: Without dead ends: 11519 [2021-12-15 09:56:34,281 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:56:34,281 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 192 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:34,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 419 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2021-12-15 09:56:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 11190. [2021-12-15 09:56:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0226114934310484) internal successors, (11442), 11189 states have internal predecessors, (11442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11442 transitions. [2021-12-15 09:56:34,354 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11442 transitions. Word has length 1239 [2021-12-15 09:56:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:34,354 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11442 transitions. [2021-12-15 09:56:34,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11442 transitions. [2021-12-15 09:56:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1265 [2021-12-15 09:56:34,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:34,369 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:34,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:56:34,369 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash -102703652, now seen corresponding path program 1 times [2021-12-15 09:56:34,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:34,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574670374] [2021-12-15 09:56:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:34,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2856 backedges. 1547 proven. 0 refuted. 0 times theorem prover too weak. 1309 trivial. 0 not checked. [2021-12-15 09:56:34,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:34,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574670374] [2021-12-15 09:56:34,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574670374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:34,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:56:34,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:56:34,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717770751] [2021-12-15 09:56:34,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:34,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:34,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:34,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:56:34,677 INFO L87 Difference]: Start difference. First operand 11190 states and 11442 transitions. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:35,311 INFO L93 Difference]: Finished difference Result 22707 states and 23220 transitions. [2021-12-15 09:56:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1264 [2021-12-15 09:56:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:35,323 INFO L225 Difference]: With dead ends: 22707 [2021-12-15 09:56:35,323 INFO L226 Difference]: Without dead ends: 11848 [2021-12-15 09:56:35,327 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:56:35,327 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 225 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:35,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 429 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-12-15 09:56:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11848. [2021-12-15 09:56:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0217776652317043) internal successors, (12105), 11847 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12105 transitions. [2021-12-15 09:56:35,434 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12105 transitions. Word has length 1264 [2021-12-15 09:56:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:35,435 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12105 transitions. [2021-12-15 09:56:35,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12105 transitions. [2021-12-15 09:56:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1319 [2021-12-15 09:56:35,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:35,457 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:35,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:56:35,458 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:35,458 INFO L85 PathProgramCache]: Analyzing trace with hash -304361983, now seen corresponding path program 1 times [2021-12-15 09:56:35,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:35,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7848093] [2021-12-15 09:56:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:35,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2912 backedges. 2140 proven. 6 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-15 09:56:35,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:35,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7848093] [2021-12-15 09:56:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7848093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:35,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15417779] [2021-12-15 09:56:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:35,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:35,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:35,977 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) [2021-12-15 09:56:35,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:56:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:36,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2912 backedges. 1560 proven. 0 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2021-12-15 09:56:38,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:38,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15417779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:38,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:38,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2021-12-15 09:56:38,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075080704] [2021-12-15 09:56:38,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:38,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:38,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:56:38,662 INFO L87 Difference]: Start difference. First operand 11848 states and 12105 transitions. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 2 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:39,315 INFO L93 Difference]: Finished difference Result 23365 states and 23877 transitions. [2021-12-15 09:56:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 2 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1318 [2021-12-15 09:56:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:39,327 INFO L225 Difference]: With dead ends: 23365 [2021-12-15 09:56:39,327 INFO L226 Difference]: Without dead ends: 11848 [2021-12-15 09:56:39,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1327 GetRequests, 1319 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-15 09:56:39,334 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 87 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:39,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 79 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-12-15 09:56:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11848. [2021-12-15 09:56:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0215244365662193) internal successors, (12102), 11847 states have internal predecessors, (12102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12102 transitions. [2021-12-15 09:56:39,417 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12102 transitions. Word has length 1318 [2021-12-15 09:56:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:39,417 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12102 transitions. [2021-12-15 09:56:39,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 2 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12102 transitions. [2021-12-15 09:56:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1349 [2021-12-15 09:56:39,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:39,431 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:39,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:39,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 09:56:39,655 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1536031808, now seen corresponding path program 1 times [2021-12-15 09:56:39,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:39,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724600340] [2021-12-15 09:56:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:39,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3431 backedges. 1620 proven. 156 refuted. 0 times theorem prover too weak. 1655 trivial. 0 not checked. [2021-12-15 09:56:40,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724600340] [2021-12-15 09:56:40,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724600340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798544059] [2021-12-15 09:56:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:40,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:40,084 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) [2021-12-15 09:56:40,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:56:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:40,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:56:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3431 backedges. 1776 proven. 0 refuted. 0 times theorem prover too weak. 1655 trivial. 0 not checked. [2021-12-15 09:56:42,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:42,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798544059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:42,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:42,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:56:42,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047418834] [2021-12-15 09:56:42,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:42,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:42,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:42,347 INFO L87 Difference]: Start difference. First operand 11848 states and 12102 transitions. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:43,008 INFO L93 Difference]: Finished difference Result 25668 states and 26253 transitions. [2021-12-15 09:56:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1348 [2021-12-15 09:56:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:43,024 INFO L225 Difference]: With dead ends: 25668 [2021-12-15 09:56:43,024 INFO L226 Difference]: Without dead ends: 14151 [2021-12-15 09:56:43,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1352 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:56:43,032 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:43,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 92 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:56:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-15 09:56:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13164. [2021-12-15 09:56:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0205880118514017) internal successors, (13434), 13163 states have internal predecessors, (13434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13434 transitions. [2021-12-15 09:56:43,133 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13434 transitions. Word has length 1348 [2021-12-15 09:56:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:43,133 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13434 transitions. [2021-12-15 09:56:43,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13434 transitions. [2021-12-15 09:56:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1604 [2021-12-15 09:56:43,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:43,150 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:43,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:56:43,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:43,364 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1703408672, now seen corresponding path program 1 times [2021-12-15 09:56:43,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:43,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353591507] [2021-12-15 09:56:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:43,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4162 backedges. 3114 proven. 73 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2021-12-15 09:56:43,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:43,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353591507] [2021-12-15 09:56:43,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353591507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562120238] [2021-12-15 09:56:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:43,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:43,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:43,953 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) [2021-12-15 09:56:43,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:56:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4162 backedges. 2902 proven. 0 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-12-15 09:56:46,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:46,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562120238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:46,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:46,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-15 09:56:46,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947308216] [2021-12-15 09:56:46,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:46,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:46,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-15 09:56:46,345 INFO L87 Difference]: Start difference. First operand 13164 states and 13434 transitions. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:46,928 INFO L93 Difference]: Finished difference Result 25997 states and 26535 transitions. [2021-12-15 09:56:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1603 [2021-12-15 09:56:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:46,938 INFO L225 Difference]: With dead ends: 25997 [2021-12-15 09:56:46,938 INFO L226 Difference]: Without dead ends: 13164 [2021-12-15 09:56:46,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1613 GetRequests, 1604 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-15 09:56:46,945 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 62 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:46,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 426 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:56:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2021-12-15 09:56:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 13164. [2021-12-15 09:56:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.020436070804528) internal successors, (13432), 13163 states have internal predecessors, (13432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13432 transitions. [2021-12-15 09:56:47,038 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13432 transitions. Word has length 1603 [2021-12-15 09:56:47,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:47,038 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13432 transitions. [2021-12-15 09:56:47,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13432 transitions. [2021-12-15 09:56:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1753 [2021-12-15 09:56:47,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:47,056 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:47,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:47,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:56:47,261 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash -302594407, now seen corresponding path program 1 times [2021-12-15 09:56:47,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639702007] [2021-12-15 09:56:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:47,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5717 backedges. 2748 proven. 1560 refuted. 0 times theorem prover too weak. 1409 trivial. 0 not checked. [2021-12-15 09:56:47,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639702007] [2021-12-15 09:56:47,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639702007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451459654] [2021-12-15 09:56:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:47,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:47,885 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) [2021-12-15 09:56:47,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:56:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:56:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5717 backedges. 2745 proven. 0 refuted. 0 times theorem prover too weak. 2972 trivial. 0 not checked. [2021-12-15 09:56:50,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:50,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451459654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:50,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:50,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:56:50,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341710276] [2021-12-15 09:56:50,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:50,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:50,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:50,122 INFO L87 Difference]: Start difference. First operand 13164 states and 13432 transitions. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:50,707 INFO L93 Difference]: Finished difference Result 26655 states and 27200 transitions. [2021-12-15 09:56:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:50,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1752 [2021-12-15 09:56:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:50,718 INFO L225 Difference]: With dead ends: 26655 [2021-12-15 09:56:50,718 INFO L226 Difference]: Without dead ends: 13822 [2021-12-15 09:56:50,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1758 GetRequests, 1754 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:56:50,726 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:50,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 426 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:56:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-15 09:56:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13822. [2021-12-15 09:56:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0197525504666811) internal successors, (14094), 13821 states have internal predecessors, (14094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14094 transitions. [2021-12-15 09:56:50,836 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14094 transitions. Word has length 1752 [2021-12-15 09:56:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:50,837 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14094 transitions. [2021-12-15 09:56:50,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14094 transitions. [2021-12-15 09:56:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1836 [2021-12-15 09:56:50,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:50,857 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:50,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:51,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:56:51,076 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash -397599302, now seen corresponding path program 1 times [2021-12-15 09:56:51,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:51,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959819504] [2021-12-15 09:56:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:51,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5728 backedges. 4339 proven. 79 refuted. 0 times theorem prover too weak. 1310 trivial. 0 not checked. [2021-12-15 09:56:51,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:51,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959819504] [2021-12-15 09:56:51,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959819504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:51,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201850690] [2021-12-15 09:56:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:51,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:51,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:51,796 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) [2021-12-15 09:56:51,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:56:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5728 backedges. 2904 proven. 0 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2021-12-15 09:56:54,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:54,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201850690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:54,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:54,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-12-15 09:56:54,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828031186] [2021-12-15 09:56:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:56:54,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:56:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-15 09:56:54,509 INFO L87 Difference]: Start difference. First operand 13822 states and 14094 transitions. Second operand has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:55,464 INFO L93 Difference]: Finished difference Result 27313 states and 27855 transitions. [2021-12-15 09:56:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:56:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1835 [2021-12-15 09:56:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:55,473 INFO L225 Difference]: With dead ends: 27313 [2021-12-15 09:56:55,477 INFO L226 Difference]: Without dead ends: 13822 [2021-12-15 09:56:55,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1845 GetRequests, 1835 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-15 09:56:55,485 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 128 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:55,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 400 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:56:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-15 09:56:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13822. [2021-12-15 09:56:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0194631358078288) internal successors, (14090), 13821 states have internal predecessors, (14090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14090 transitions. [2021-12-15 09:56:55,590 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14090 transitions. Word has length 1835 [2021-12-15 09:56:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:55,591 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14090 transitions. [2021-12-15 09:56:55,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14090 transitions. [2021-12-15 09:56:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1837 [2021-12-15 09:56:55,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:55,619 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:55,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 09:56:55,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:56:55,821 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1754584046, now seen corresponding path program 1 times [2021-12-15 09:56:55,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:55,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632763468] [2021-12-15 09:56:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:55,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 3316 proven. 505 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2021-12-15 09:56:56,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:56:56,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632763468] [2021-12-15 09:56:56,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632763468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:56:56,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412505092] [2021-12-15 09:56:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:56,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:56,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:56:56,373 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) [2021-12-15 09:56:56,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:56:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:56:56,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:56:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:56:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 4106 proven. 0 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2021-12-15 09:56:58,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:56:58,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412505092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:56:58,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:56:58,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 09:56:58,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7062240] [2021-12-15 09:56:58,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:56:58,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:56:58,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:56:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:56:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:56:58,753 INFO L87 Difference]: Start difference. First operand 13822 states and 14090 transitions. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:56:59,499 INFO L93 Difference]: Finished difference Result 30274 states and 30879 transitions. [2021-12-15 09:56:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:56:59,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1836 [2021-12-15 09:56:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:56:59,513 INFO L225 Difference]: With dead ends: 30274 [2021-12-15 09:56:59,513 INFO L226 Difference]: Without dead ends: 16783 [2021-12-15 09:56:59,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1844 GetRequests, 1838 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:56:59,520 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:56:59,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 423 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:56:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-12-15 09:56:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 16125. [2021-12-15 09:56:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.018171669560903) internal successors, (16417), 16124 states have internal predecessors, (16417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16417 transitions. [2021-12-15 09:56:59,639 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16417 transitions. Word has length 1836 [2021-12-15 09:56:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:56:59,640 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16417 transitions. [2021-12-15 09:56:59,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:56:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16417 transitions. [2021-12-15 09:56:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1868 [2021-12-15 09:56:59,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:56:59,664 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:56:59,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:56:59,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:56:59,869 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:56:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:56:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1848399381, now seen corresponding path program 1 times [2021-12-15 09:56:59,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:56:59,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348006079] [2021-12-15 09:56:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:56:59,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:56:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7051 backedges. 3441 proven. 523 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2021-12-15 09:57:00,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:00,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348006079] [2021-12-15 09:57:00,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348006079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:00,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601938320] [2021-12-15 09:57:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:00,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:00,421 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) [2021-12-15 09:57:00,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:57:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:57:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:57:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7051 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 6920 trivial. 0 not checked. [2021-12-15 09:57:04,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:57:04,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601938320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:04,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:57:04,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 09:57:04,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501587885] [2021-12-15 09:57:04,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:04,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:04,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:04,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:57:04,251 INFO L87 Difference]: Start difference. First operand 16125 states and 16417 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:04,287 INFO L93 Difference]: Finished difference Result 16456 states and 16751 transitions. [2021-12-15 09:57:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1867 [2021-12-15 09:57:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:04,300 INFO L225 Difference]: With dead ends: 16456 [2021-12-15 09:57:04,301 INFO L226 Difference]: Without dead ends: 16454 [2021-12-15 09:57:04,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1875 GetRequests, 1869 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:57:04,305 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 318 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 745 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:04,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 431 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 745 Unchecked, 0.0s Time] [2021-12-15 09:57:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16454 states. [2021-12-15 09:57:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16454 to 16125. [2021-12-15 09:57:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.018171669560903) internal successors, (16417), 16124 states have internal predecessors, (16417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16417 transitions. [2021-12-15 09:57:04,428 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16417 transitions. Word has length 1867 [2021-12-15 09:57:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:04,429 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16417 transitions. [2021-12-15 09:57:04,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:57:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16417 transitions. [2021-12-15 09:57:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2017 [2021-12-15 09:57:04,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:04,503 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:04,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:57:04,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:04,720 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1355461401, now seen corresponding path program 1 times [2021-12-15 09:57:04,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583162335] [2021-12-15 09:57:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:04,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8435 backedges. 3907 proven. 523 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2021-12-15 09:57:05,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583162335] [2021-12-15 09:57:05,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583162335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251451697] [2021-12-15 09:57:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:05,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:05,291 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) [2021-12-15 09:57:05,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:57:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:57:05,652 INFO L286 TraceCheckSpWp]: Computing forward predicates...