./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem17_label47.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 584120db80e48cf9596b5da45bc5f64e7e8f9b48dd0380aa05459606ea632f16 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:38:05,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:38:05,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:38:05,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:38:05,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:38:05,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:38:05,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:38:05,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:38:05,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:38:05,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:38:05,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:38:05,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:38:05,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:38:05,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:38:05,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:38:05,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:38:05,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:38:05,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:38:05,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:38:05,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:38:05,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:38:05,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:38:05,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:38:05,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:38:05,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:38:05,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:38:05,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:38:05,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:38:05,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:38:05,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:38:05,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:38:05,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:38:05,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:38:05,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:38:05,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:38:05,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:38:05,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:38:05,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:38:05,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:38:05,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:38:05,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:38:05,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:38:05,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:38:05,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:38:05,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:38:05,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:38:05,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:38:05,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:38:05,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:38:05,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:38:05,911 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:38:05,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:38:05,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:38:05,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:38:05,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:38:05,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:38:05,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:38:05,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:38:05,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:38:05,913 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:38:05,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:38:05,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:38:05,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:38:05,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:38:05,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:38:05,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:38:05,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:38:05,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:38:05,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:38:05,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:38:05,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:38:05,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:38:05,916 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:38:05,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:38:05,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:38:05,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:38:05,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 584120db80e48cf9596b5da45bc5f64e7e8f9b48dd0380aa05459606ea632f16 [2021-12-22 09:38:06,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:38:06,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:38:06,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:38:06,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:38:06,228 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:38:06,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label47.c [2021-12-22 09:38:06,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439f5a631/2160923dd0b14e54b0dba3239cc5a0d3/FLAG56502cfb7 [2021-12-22 09:38:06,909 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:38:06,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label47.c [2021-12-22 09:38:06,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439f5a631/2160923dd0b14e54b0dba3239cc5a0d3/FLAG56502cfb7 [2021-12-22 09:38:07,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439f5a631/2160923dd0b14e54b0dba3239cc5a0d3 [2021-12-22 09:38:07,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:38:07,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:38:07,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:38:07,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:38:07,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:38:07,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:38:07" (1/1) ... [2021-12-22 09:38:07,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a40548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:07, skipping insertion in model container [2021-12-22 09:38:07,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:38:07" (1/1) ... [2021-12-22 09:38:07,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:38:07,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:38:07,591 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/Problem17_label47.c[6608,6621] [2021-12-22 09:38:08,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:38:08,166 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:38:08,195 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/Problem17_label47.c[6608,6621] [2021-12-22 09:38:08,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:38:08,546 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:38:08,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08 WrapperNode [2021-12-22 09:38:08,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:38:08,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:38:08,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:38:08,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:38:08,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:08,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:08,904 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-22 09:38:08,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:38:08,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:38:08,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:38:08,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:38:08,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:08,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:09,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:09,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:09,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:09,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:09,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:09,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:38:09,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:38:09,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:38:09,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:38:09,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (1/1) ... [2021-12-22 09:38:09,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:38:09,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:38:09,404 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) [2021-12-22 09:38:09,429 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 [2021-12-22 09:38:09,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:38:09,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:38:09,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:38:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:38:09,497 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:38:09,498 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:38:12,548 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:38:12,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:38:12,563 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:38:12,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:38:12 BoogieIcfgContainer [2021-12-22 09:38:12,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:38:12,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:38:12,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:38:12,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:38:12,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:38:07" (1/3) ... [2021-12-22 09:38:12,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b6f057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:38:12, skipping insertion in model container [2021-12-22 09:38:12,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:08" (2/3) ... [2021-12-22 09:38:12,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b6f057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:38:12, skipping insertion in model container [2021-12-22 09:38:12,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:38:12" (3/3) ... [2021-12-22 09:38:12,572 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label47.c [2021-12-22 09:38:12,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:38:12,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:38:12,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:38:12,670 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 [2021-12-22 09:38:12,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:38:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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) [2021-12-22 09:38:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 09:38:12,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:12,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:38:12,705 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2021-12-22 09:38:12,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:12,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490836548] [2021-12-22 09:38:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:12,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:38:12,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490836548] [2021-12-22 09:38:12,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490836548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:12,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:12,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:38:13,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774051986] [2021-12-22 09:38:13,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:13,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:13,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:13,034 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:38:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:15,590 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-22 09:38:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 09:38:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:15,609 INFO L225 Difference]: With dead ends: 1644 [2021-12-22 09:38:15,609 INFO L226 Difference]: Without dead ends: 977 [2021-12-22 09:38:15,615 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 [2021-12-22 09:38:15,618 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 444 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:15,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:38:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-22 09:38:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-22 09:38:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 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) [2021-12-22 09:38:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-22 09:38:15,698 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 44 [2021-12-22 09:38:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:15,699 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-22 09:38:15,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:38:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-22 09:38:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 09:38:15,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:15,703 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:38:15,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:38:15,704 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1801670618, now seen corresponding path program 1 times [2021-12-22 09:38:15,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:15,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879063716] [2021-12-22 09:38:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:15,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:38:15,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:15,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879063716] [2021-12-22 09:38:15,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879063716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:15,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:15,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:38:15,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390902158] [2021-12-22 09:38:15,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:15,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:15,821 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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) [2021-12-22 09:38:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:18,231 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2021-12-22 09:38:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 111 [2021-12-22 09:38:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:18,239 INFO L225 Difference]: With dead ends: 2815 [2021-12-22 09:38:18,239 INFO L226 Difference]: Without dead ends: 1846 [2021-12-22 09:38:18,241 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 [2021-12-22 09:38:18,243 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:18,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 580 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:38:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-22 09:38:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2021-12-22 09:38:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 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) [2021-12-22 09:38:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2021-12-22 09:38:18,289 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 111 [2021-12-22 09:38:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:18,290 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2021-12-22 09:38:18,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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) [2021-12-22 09:38:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2021-12-22 09:38:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-22 09:38:18,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:18,294 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:38:18,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:38:18,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash 148499438, now seen corresponding path program 1 times [2021-12-22 09:38:18,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:18,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142513121] [2021-12-22 09:38:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:18,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:38:18,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142513121] [2021-12-22 09:38:18,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142513121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:18,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:18,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:18,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333841277] [2021-12-22 09:38:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:18,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:38:18,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:38:18,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:18,422 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:38:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:22,211 INFO L93 Difference]: Finished difference Result 5865 states and 8159 transitions. [2021-12-22 09:38:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:38:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-22 09:38:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:22,227 INFO L225 Difference]: With dead ends: 5865 [2021-12-22 09:38:22,228 INFO L226 Difference]: Without dead ends: 4026 [2021-12-22 09:38:22,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:22,232 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 938 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2907 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 2907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:22,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 440 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 2907 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-22 09:38:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-12-22 09:38:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4020. [2021-12-22 09:38:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4019 states have (on average 1.3264493655138094) internal successors, (5331), 4019 states have internal predecessors, (5331), 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) [2021-12-22 09:38:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5331 transitions. [2021-12-22 09:38:22,301 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5331 transitions. Word has length 114 [2021-12-22 09:38:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:22,302 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 5331 transitions. [2021-12-22 09:38:22,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:38:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5331 transitions. [2021-12-22 09:38:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 09:38:22,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:22,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:38:22,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:38:22,307 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1947040115, now seen corresponding path program 1 times [2021-12-22 09:38:22,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:22,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391578797] [2021-12-22 09:38:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:22,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 09:38:22,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:22,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391578797] [2021-12-22 09:38:22,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391578797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:22,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:22,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:38:22,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49019635] [2021-12-22 09:38:22,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:22,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:22,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:22,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:22,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:22,466 INFO L87 Difference]: Start difference. First operand 4020 states and 5331 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2021-12-22 09:38:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:24,169 INFO L93 Difference]: Finished difference Result 10602 states and 14367 transitions. [2021-12-22 09:38:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 179 [2021-12-22 09:38:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:24,192 INFO L225 Difference]: With dead ends: 10602 [2021-12-22 09:38:24,192 INFO L226 Difference]: Without dead ends: 6580 [2021-12-22 09:38:24,198 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 [2021-12-22 09:38:24,199 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:24,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:38:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2021-12-22 09:38:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 5301. [2021-12-22 09:38:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5301 states, 5300 states have (on average 1.2269811320754718) internal successors, (6503), 5300 states have internal predecessors, (6503), 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) [2021-12-22 09:38:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5301 states to 5301 states and 6503 transitions. [2021-12-22 09:38:24,300 INFO L78 Accepts]: Start accepts. Automaton has 5301 states and 6503 transitions. Word has length 179 [2021-12-22 09:38:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:24,301 INFO L470 AbstractCegarLoop]: Abstraction has 5301 states and 6503 transitions. [2021-12-22 09:38:24,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2021-12-22 09:38:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5301 states and 6503 transitions. [2021-12-22 09:38:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-22 09:38:24,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:24,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-22 09:38:24,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:38:24,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash 402637231, now seen corresponding path program 1 times [2021-12-22 09:38:24,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098273887] [2021-12-22 09:38:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:24,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:38:24,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098273887] [2021-12-22 09:38:24,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098273887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:24,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:24,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 09:38:24,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765532841] [2021-12-22 09:38:24,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:24,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:38:24,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:38:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:38:24,509 INFO L87 Difference]: Start difference. First operand 5301 states and 6503 transitions. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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) [2021-12-22 09:38:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:26,836 INFO L93 Difference]: Finished difference Result 13191 states and 16563 transitions. [2021-12-22 09:38:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:38:26,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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 192 [2021-12-22 09:38:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:26,869 INFO L225 Difference]: With dead ends: 13191 [2021-12-22 09:38:26,869 INFO L226 Difference]: Without dead ends: 7892 [2021-12-22 09:38:26,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:38:26,879 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1659 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:26,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 834 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 09:38:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7892 states. [2021-12-22 09:38:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7892 to 7858. [2021-12-22 09:38:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 1.2102583683339696) internal successors, (9509), 7857 states have internal predecessors, (9509), 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) [2021-12-22 09:38:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 9509 transitions. [2021-12-22 09:38:27,005 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 9509 transitions. Word has length 192 [2021-12-22 09:38:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:27,006 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 9509 transitions. [2021-12-22 09:38:27,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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) [2021-12-22 09:38:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 9509 transitions. [2021-12-22 09:38:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-22 09:38:27,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:27,013 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:38:27,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:38:27,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1325173592, now seen corresponding path program 1 times [2021-12-22 09:38:27,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:27,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137395007] [2021-12-22 09:38:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:27,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-12-22 09:38:27,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:27,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137395007] [2021-12-22 09:38:27,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137395007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:27,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:27,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:27,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315473986] [2021-12-22 09:38:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:27,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:27,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:27,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:27,176 INFO L87 Difference]: Start difference. First operand 7858 states and 9509 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2021-12-22 09:38:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:29,604 INFO L93 Difference]: Finished difference Result 23005 states and 27850 transitions. [2021-12-22 09:38:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 296 [2021-12-22 09:38:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:29,640 INFO L225 Difference]: With dead ends: 23005 [2021-12-22 09:38:29,640 INFO L226 Difference]: Without dead ends: 15149 [2021-12-22 09:38:29,650 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 [2021-12-22 09:38:29,652 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 463 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:29,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 923 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:38:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15149 states. [2021-12-22 09:38:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15149 to 12995. [2021-12-22 09:38:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 1.2274126519932276) internal successors, (15949), 12994 states have internal predecessors, (15949), 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) [2021-12-22 09:38:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 15949 transitions. [2021-12-22 09:38:29,852 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 15949 transitions. Word has length 296 [2021-12-22 09:38:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:29,853 INFO L470 AbstractCegarLoop]: Abstraction has 12995 states and 15949 transitions. [2021-12-22 09:38:29,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2021-12-22 09:38:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 15949 transitions. [2021-12-22 09:38:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-22 09:38:29,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:29,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:38:29,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:38:29,860 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash -918027661, now seen corresponding path program 1 times [2021-12-22 09:38:29,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:29,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423465152] [2021-12-22 09:38:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:29,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-12-22 09:38:30,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:30,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423465152] [2021-12-22 09:38:30,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423465152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:30,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:30,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:30,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954869737] [2021-12-22 09:38:30,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:30,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:30,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:30,018 INFO L87 Difference]: Start difference. First operand 12995 states and 15949 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-22 09:38:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:31,991 INFO L93 Difference]: Finished difference Result 31501 states and 38602 transitions. [2021-12-22 09:38:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 297 [2021-12-22 09:38:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:32,026 INFO L225 Difference]: With dead ends: 31501 [2021-12-22 09:38:32,027 INFO L226 Difference]: Without dead ends: 17658 [2021-12-22 09:38:32,041 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 [2021-12-22 09:38:32,042 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 400 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:32,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 952 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-22 09:38:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2021-12-22 09:38:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 12121. [2021-12-22 09:38:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12121 states, 12120 states have (on average 1.1797029702970296) internal successors, (14298), 12120 states have internal predecessors, (14298), 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) [2021-12-22 09:38:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12121 states to 12121 states and 14298 transitions. [2021-12-22 09:38:32,225 INFO L78 Accepts]: Start accepts. Automaton has 12121 states and 14298 transitions. Word has length 297 [2021-12-22 09:38:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:32,226 INFO L470 AbstractCegarLoop]: Abstraction has 12121 states and 14298 transitions. [2021-12-22 09:38:32,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-22 09:38:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 12121 states and 14298 transitions. [2021-12-22 09:38:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-22 09:38:32,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:32,232 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:38:32,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:38:32,232 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2082452149, now seen corresponding path program 1 times [2021-12-22 09:38:32,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:32,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292819753] [2021-12-22 09:38:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:32,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-22 09:38:32,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:32,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292819753] [2021-12-22 09:38:32,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292819753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:32,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:32,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:32,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124557936] [2021-12-22 09:38:32,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:32,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:32,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:32,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:32,410 INFO L87 Difference]: Start difference. First operand 12121 states and 14298 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-22 09:38:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:34,307 INFO L93 Difference]: Finished difference Result 31045 states and 36681 transitions. [2021-12-22 09:38:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 314 [2021-12-22 09:38:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:34,341 INFO L225 Difference]: With dead ends: 31045 [2021-12-22 09:38:34,341 INFO L226 Difference]: Without dead ends: 18926 [2021-12-22 09:38:34,356 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 [2021-12-22 09:38:34,357 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 449 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:34,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 405 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-22 09:38:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-12-22 09:38:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 16793. [2021-12-22 09:38:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16793 states, 16792 states have (on average 1.167877560743211) internal successors, (19611), 16792 states have internal predecessors, (19611), 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) [2021-12-22 09:38:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16793 states to 16793 states and 19611 transitions. [2021-12-22 09:38:34,572 INFO L78 Accepts]: Start accepts. Automaton has 16793 states and 19611 transitions. Word has length 314 [2021-12-22 09:38:34,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:34,573 INFO L470 AbstractCegarLoop]: Abstraction has 16793 states and 19611 transitions. [2021-12-22 09:38:34,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-22 09:38:34,573 INFO L276 IsEmpty]: Start isEmpty. Operand 16793 states and 19611 transitions. [2021-12-22 09:38:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-22 09:38:34,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:34,581 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:38:34,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:38:34,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2095784456, now seen corresponding path program 1 times [2021-12-22 09:38:34,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:34,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374720781] [2021-12-22 09:38:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:34,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-12-22 09:38:34,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:34,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374720781] [2021-12-22 09:38:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374720781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:34,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:34,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:34,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261329782] [2021-12-22 09:38:34,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:34,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:34,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:34,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:34,765 INFO L87 Difference]: Start difference. First operand 16793 states and 19611 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-12-22 09:38:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:36,544 INFO L93 Difference]: Finished difference Result 41278 states and 48341 transitions. [2021-12-22 09:38:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 358 [2021-12-22 09:38:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:36,589 INFO L225 Difference]: With dead ends: 41278 [2021-12-22 09:38:36,589 INFO L226 Difference]: Without dead ends: 23623 [2021-12-22 09:38:36,609 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 [2021-12-22 09:38:36,612 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 482 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:36,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 801 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:38:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23623 states. [2021-12-22 09:38:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23623 to 21064. [2021-12-22 09:38:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21064 states, 21063 states have (on average 1.166595451740018) internal successors, (24572), 21063 states have internal predecessors, (24572), 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) [2021-12-22 09:38:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21064 states to 21064 states and 24572 transitions. [2021-12-22 09:38:37,002 INFO L78 Accepts]: Start accepts. Automaton has 21064 states and 24572 transitions. Word has length 358 [2021-12-22 09:38:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:37,003 INFO L470 AbstractCegarLoop]: Abstraction has 21064 states and 24572 transitions. [2021-12-22 09:38:37,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2021-12-22 09:38:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21064 states and 24572 transitions. [2021-12-22 09:38:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-12-22 09:38:37,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:37,011 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-22 09:38:37,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:38:37,011 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1853233684, now seen corresponding path program 1 times [2021-12-22 09:38:37,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:37,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440608288] [2021-12-22 09:38:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:37,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-22 09:38:37,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:37,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440608288] [2021-12-22 09:38:37,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440608288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:37,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:37,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:38:37,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549070681] [2021-12-22 09:38:37,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:37,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:38:37,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:37,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:38:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:37,218 INFO L87 Difference]: Start difference. First operand 21064 states and 24572 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 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) [2021-12-22 09:38:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:40,104 INFO L93 Difference]: Finished difference Result 61335 states and 70911 transitions. [2021-12-22 09:38:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:38:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 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 366 [2021-12-22 09:38:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:40,163 INFO L225 Difference]: With dead ends: 61335 [2021-12-22 09:38:40,163 INFO L226 Difference]: Without dead ends: 39848 [2021-12-22 09:38:40,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:40,179 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 920 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:40,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 190 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 09:38:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-12-22 09:38:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 26634. [2021-12-22 09:38:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26634 states, 26633 states have (on average 1.168475199939924) internal successors, (31120), 26633 states have internal predecessors, (31120), 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) [2021-12-22 09:38:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26634 states to 26634 states and 31120 transitions. [2021-12-22 09:38:40,576 INFO L78 Accepts]: Start accepts. Automaton has 26634 states and 31120 transitions. Word has length 366 [2021-12-22 09:38:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:40,576 INFO L470 AbstractCegarLoop]: Abstraction has 26634 states and 31120 transitions. [2021-12-22 09:38:40,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 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) [2021-12-22 09:38:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 26634 states and 31120 transitions. [2021-12-22 09:38:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-22 09:38:40,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:40,585 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:38:40,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:38:40,585 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash 773910742, now seen corresponding path program 1 times [2021-12-22 09:38:40,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:40,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358370739] [2021-12-22 09:38:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:40,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 09:38:40,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:40,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358370739] [2021-12-22 09:38:40,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358370739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:40,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:40,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:40,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300084112] [2021-12-22 09:38:40,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:40,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:40,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:40,734 INFO L87 Difference]: Start difference. First operand 26634 states and 31120 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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) [2021-12-22 09:38:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:42,543 INFO L93 Difference]: Finished difference Result 64404 states and 75814 transitions. [2021-12-22 09:38:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 386 [2021-12-22 09:38:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:42,588 INFO L225 Difference]: With dead ends: 64404 [2021-12-22 09:38:42,589 INFO L226 Difference]: Without dead ends: 36922 [2021-12-22 09:38:42,614 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 [2021-12-22 09:38:42,615 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 379 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:42,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 886 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:38:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36922 states. [2021-12-22 09:38:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36922 to 36058. [2021-12-22 09:38:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36058 states, 36057 states have (on average 1.145353190781263) internal successors, (41298), 36057 states have internal predecessors, (41298), 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) [2021-12-22 09:38:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36058 states to 36058 states and 41298 transitions. [2021-12-22 09:38:43,128 INFO L78 Accepts]: Start accepts. Automaton has 36058 states and 41298 transitions. Word has length 386 [2021-12-22 09:38:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:43,129 INFO L470 AbstractCegarLoop]: Abstraction has 36058 states and 41298 transitions. [2021-12-22 09:38:43,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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) [2021-12-22 09:38:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 36058 states and 41298 transitions. [2021-12-22 09:38:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-12-22 09:38:43,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:43,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:38:43,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:38:43,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:43,142 INFO L85 PathProgramCache]: Analyzing trace with hash 92841162, now seen corresponding path program 1 times [2021-12-22 09:38:43,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:43,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912965677] [2021-12-22 09:38:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:43,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:38:43,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:43,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912965677] [2021-12-22 09:38:43,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912965677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:43,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:43,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:43,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305428444] [2021-12-22 09:38:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:43,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:43,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:43,334 INFO L87 Difference]: Start difference. First operand 36058 states and 41298 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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) [2021-12-22 09:38:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:45,242 INFO L93 Difference]: Finished difference Result 82782 states and 94745 transitions. [2021-12-22 09:38:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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 433 [2021-12-22 09:38:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:45,295 INFO L225 Difference]: With dead ends: 82782 [2021-12-22 09:38:45,296 INFO L226 Difference]: Without dead ends: 45438 [2021-12-22 09:38:45,324 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 [2021-12-22 09:38:45,325 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 320 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:45,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 746 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:38:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45438 states. [2021-12-22 09:38:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45438 to 36049. [2021-12-22 09:38:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36049 states, 36048 states have (on average 1.1423102529960054) internal successors, (41178), 36048 states have internal predecessors, (41178), 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) [2021-12-22 09:38:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36049 states to 36049 states and 41178 transitions. [2021-12-22 09:38:45,919 INFO L78 Accepts]: Start accepts. Automaton has 36049 states and 41178 transitions. Word has length 433 [2021-12-22 09:38:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:45,920 INFO L470 AbstractCegarLoop]: Abstraction has 36049 states and 41178 transitions. [2021-12-22 09:38:45,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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) [2021-12-22 09:38:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 36049 states and 41178 transitions. [2021-12-22 09:38:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-12-22 09:38:45,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:45,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:38:45,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:38:45,932 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash 470334227, now seen corresponding path program 1 times [2021-12-22 09:38:45,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:45,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21966205] [2021-12-22 09:38:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:45,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:38:46,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21966205] [2021-12-22 09:38:46,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21966205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:46,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:46,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:38:46,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571389790] [2021-12-22 09:38:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:46,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:38:46,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:38:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:46,104 INFO L87 Difference]: Start difference. First operand 36049 states and 41178 transitions. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2021-12-22 09:38:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:49,187 INFO L93 Difference]: Finished difference Result 106198 states and 120766 transitions. [2021-12-22 09:38:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:38:49,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 449 [2021-12-22 09:38:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:49,267 INFO L225 Difference]: With dead ends: 106198 [2021-12-22 09:38:49,267 INFO L226 Difference]: Without dead ends: 69726 [2021-12-22 09:38:49,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:49,295 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 783 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:49,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 187 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:38:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69726 states. [2021-12-22 09:38:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69726 to 60287. [2021-12-22 09:38:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60287 states, 60286 states have (on average 1.1287695318979531) internal successors, (68049), 60286 states have internal predecessors, (68049), 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) [2021-12-22 09:38:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60287 states to 60287 states and 68049 transitions. [2021-12-22 09:38:50,145 INFO L78 Accepts]: Start accepts. Automaton has 60287 states and 68049 transitions. Word has length 449 [2021-12-22 09:38:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:50,146 INFO L470 AbstractCegarLoop]: Abstraction has 60287 states and 68049 transitions. [2021-12-22 09:38:50,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2021-12-22 09:38:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 60287 states and 68049 transitions. [2021-12-22 09:38:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-22 09:38:50,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:50,161 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 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, 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] [2021-12-22 09:38:50,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:38:50,161 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:50,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash -987294033, now seen corresponding path program 1 times [2021-12-22 09:38:50,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:50,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98091042] [2021-12-22 09:38:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:50,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 551 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-22 09:38:50,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98091042] [2021-12-22 09:38:50,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98091042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:50,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:50,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:38:50,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649261590] [2021-12-22 09:38:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:50,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:38:50,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:38:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:38:50,365 INFO L87 Difference]: Start difference. First operand 60287 states and 68049 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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) [2021-12-22 09:38:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:52,590 INFO L93 Difference]: Finished difference Result 141000 states and 159171 transitions. [2021-12-22 09:38:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:38:52,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 468 [2021-12-22 09:38:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:52,684 INFO L225 Difference]: With dead ends: 141000 [2021-12-22 09:38:52,684 INFO L226 Difference]: Without dead ends: 79423 [2021-12-22 09:38:52,717 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 [2021-12-22 09:38:52,718 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 445 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:52,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 649 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:38:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79423 states. [2021-12-22 09:38:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79423 to 73450. [2021-12-22 09:38:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73450 states, 73449 states have (on average 1.1131124998298139) internal successors, (81757), 73449 states have internal predecessors, (81757), 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) [2021-12-22 09:38:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73450 states to 73450 states and 81757 transitions. [2021-12-22 09:38:53,686 INFO L78 Accepts]: Start accepts. Automaton has 73450 states and 81757 transitions. Word has length 468 [2021-12-22 09:38:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:53,686 INFO L470 AbstractCegarLoop]: Abstraction has 73450 states and 81757 transitions. [2021-12-22 09:38:53,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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) [2021-12-22 09:38:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 73450 states and 81757 transitions. [2021-12-22 09:38:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2021-12-22 09:38:53,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:53,697 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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] [2021-12-22 09:38:53,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:38:53,698 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash -841867674, now seen corresponding path program 1 times [2021-12-22 09:38:53,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:53,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909226667] [2021-12-22 09:38:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:53,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-22 09:38:53,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:53,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909226667] [2021-12-22 09:38:53,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909226667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:53,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:53,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:38:53,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613853480] [2021-12-22 09:38:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:53,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:38:53,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:38:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:53,933 INFO L87 Difference]: Start difference. First operand 73450 states and 81757 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 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) [2021-12-22 09:38:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:38:56,936 INFO L93 Difference]: Finished difference Result 184847 states and 205031 transitions. [2021-12-22 09:38:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:38:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 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 472 [2021-12-22 09:38:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:38:57,072 INFO L225 Difference]: With dead ends: 184847 [2021-12-22 09:38:57,072 INFO L226 Difference]: Without dead ends: 110974 [2021-12-22 09:38:57,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:57,114 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 812 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:38:57,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 177 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:38:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110974 states. [2021-12-22 09:38:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110974 to 102446. [2021-12-22 09:38:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102446 states, 102445 states have (on average 1.1084874810874128) internal successors, (113559), 102445 states have internal predecessors, (113559), 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) [2021-12-22 09:38:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102446 states to 102446 states and 113559 transitions. [2021-12-22 09:38:58,627 INFO L78 Accepts]: Start accepts. Automaton has 102446 states and 113559 transitions. Word has length 472 [2021-12-22 09:38:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:38:58,628 INFO L470 AbstractCegarLoop]: Abstraction has 102446 states and 113559 transitions. [2021-12-22 09:38:58,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 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) [2021-12-22 09:38:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 102446 states and 113559 transitions. [2021-12-22 09:38:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-12-22 09:38:58,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:38:58,640 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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] [2021-12-22 09:38:58,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 09:38:58,641 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:38:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:38:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1146238285, now seen corresponding path program 1 times [2021-12-22 09:38:58,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:38:58,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084049801] [2021-12-22 09:38:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:38:58,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:38:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:38:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-22 09:38:59,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:38:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084049801] [2021-12-22 09:38:59,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084049801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:38:59,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:38:59,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:38:59,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636800829] [2021-12-22 09:38:59,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:38:59,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:38:59,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:38:59,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:38:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:38:59,076 INFO L87 Difference]: Start difference. First operand 102446 states and 113559 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 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)