./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_label12.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 6527eed8ae625274c5a4f237cc1c724f312a2d824fa69cbfc4381a7c8bc46d7c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 22:55:54,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 22:55:54,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 22:55:54,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 22:55:54,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 22:55:54,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 22:55:54,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 22:55:54,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 22:55:54,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 22:55:54,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 22:55:54,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 22:55:54,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 22:55:54,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 22:55:54,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 22:55:54,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 22:55:54,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 22:55:54,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 22:55:54,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 22:55:54,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 22:55:54,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 22:55:54,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 22:55:54,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 22:55:54,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 22:55:54,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 22:55:54,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 22:55:54,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 22:55:54,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 22:55:54,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 22:55:54,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 22:55:54,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 22:55:54,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 22:55:54,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 22:55:54,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 22:55:54,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 22:55:54,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 22:55:54,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 22:55:54,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 22:55:54,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 22:55:54,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 22:55:54,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 22:55:54,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 22:55:54,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 22:55:54,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 22:55:54,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 22:55:54,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 22:55:54,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 22:55:54,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 22:55:54,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 22:55:54,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 22:55:54,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 22:55:54,402 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 22:55:54,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 22:55:54,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 22:55:54,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 22:55:54,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 22:55:54,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 22:55:54,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 22:55:54,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 22:55:54,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 22:55:54,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 22:55:54,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 22:55:54,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 22:55:54,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 22:55:54,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 22:55:54,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 22:55:54,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 22:55:54,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:55:54,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 22:55:54,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 22:55:54,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 22:55:54,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 22:55:54,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 22:55:54,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 22:55:54,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 22:55:54,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 22:55:54,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527eed8ae625274c5a4f237cc1c724f312a2d824fa69cbfc4381a7c8bc46d7c [2021-12-27 22:55:54,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 22:55:54,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 22:55:54,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 22:55:54,714 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 22:55:54,715 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 22:55:54,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label12.c [2021-12-27 22:55:54,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc3a673d/adc48f626f2f4f7482952d70b96a0b45/FLAG8c69cf041 [2021-12-27 22:55:55,377 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 22:55:55,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label12.c [2021-12-27 22:55:55,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc3a673d/adc48f626f2f4f7482952d70b96a0b45/FLAG8c69cf041 [2021-12-27 22:55:55,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc3a673d/adc48f626f2f4f7482952d70b96a0b45 [2021-12-27 22:55:55,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 22:55:55,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 22:55:55,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 22:55:55,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 22:55:55,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 22:55:55,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:55:55" (1/1) ... [2021-12-27 22:55:55,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@597fd5c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:55, skipping insertion in model container [2021-12-27 22:55:55,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 10:55:55" (1/1) ... [2021-12-27 22:55:55,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 22:55:55,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 22:55:56,052 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_label12.c[5027,5040] [2021-12-27 22:55:56,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:55:56,423 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 22:55:56,446 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_label12.c[5027,5040] [2021-12-27 22:55:56,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 22:55:56,661 INFO L208 MainTranslator]: Completed translation [2021-12-27 22:55:56,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56 WrapperNode [2021-12-27 22:55:56,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 22:55:56,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 22:55:56,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 22:55:56,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 22:55:56,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:56,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:56,917 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-27 22:55:56,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 22:55:56,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 22:55:56,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 22:55:56,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 22:55:56,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:56,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:56,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:56,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:57,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:57,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:57,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:57,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 22:55:57,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 22:55:57,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 22:55:57,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 22:55:57,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (1/1) ... [2021-12-27 22:55:57,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 22:55:57,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:55:57,269 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) [2021-12-27 22:55:57,281 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 [2021-12-27 22:55:57,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 22:55:57,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 22:55:57,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 22:55:57,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 22:55:57,336 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 22:55:57,337 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 22:55:59,659 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 22:55:59,667 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 22:55:59,668 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 22:55:59,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:55:59 BoogieIcfgContainer [2021-12-27 22:55:59,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 22:55:59,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 22:55:59,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 22:55:59,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 22:55:59,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 10:55:55" (1/3) ... [2021-12-27 22:55:59,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b63a13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:55:59, skipping insertion in model container [2021-12-27 22:55:59,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 10:55:56" (2/3) ... [2021-12-27 22:55:59,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b63a13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 10:55:59, skipping insertion in model container [2021-12-27 22:55:59,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 10:55:59" (3/3) ... [2021-12-27 22:55:59,675 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label12.c [2021-12-27 22:55:59,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 22:55:59,678 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 22:55:59,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 22:55:59,713 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 [2021-12-27 22:55:59,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 22:55:59,729 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) [2021-12-27 22:55:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-27 22:55:59,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:55:59,734 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] [2021-12-27 22:55:59,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:55:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:55:59,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2113343065, now seen corresponding path program 1 times [2021-12-27 22:55:59,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:55:59,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475867417] [2021-12-27 22:55:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:55:59,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:55:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:55:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:55:59,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:55:59,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475867417] [2021-12-27 22:55:59,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475867417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:55:59,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:55:59,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:55:59,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785662769] [2021-12-27 22:55:59,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:55:59,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:55:59,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:55:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:55:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:55:59,948 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 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:56:02,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:02,028 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-27 22:56:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-27 22:56:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:02,044 INFO L225 Difference]: With dead ends: 1642 [2021-12-27 22:56:02,044 INFO L226 Difference]: Without dead ends: 975 [2021-12-27 22:56:02,048 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 [2021-12-27 22:56:02,050 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 457 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:02,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-27 22:56:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-27 22:56:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-27 22:56:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 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) [2021-12-27 22:56:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-27 22:56:02,135 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 33 [2021-12-27 22:56:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:02,136 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-27 22:56:02,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:56:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-27 22:56:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-27 22:56:02,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:02,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:56:02,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 22:56:02,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:02,143 INFO L85 PathProgramCache]: Analyzing trace with hash 435284012, now seen corresponding path program 1 times [2021-12-27 22:56:02,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:02,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725087133] [2021-12-27 22:56:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:02,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:56:02,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725087133] [2021-12-27 22:56:02,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725087133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:02,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:02,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:02,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833856680] [2021-12-27 22:56:02,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:02,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:02,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:02,251 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2021-12-27 22:56:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:04,094 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-27 22:56:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:04,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 103 [2021-12-27 22:56:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:04,099 INFO L225 Difference]: With dead ends: 2814 [2021-12-27 22:56:04,100 INFO L226 Difference]: Without dead ends: 1844 [2021-12-27 22:56:04,101 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 [2021-12-27 22:56:04,102 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:04,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-27 22:56:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-27 22:56:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-27 22:56:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 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) [2021-12-27 22:56:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-27 22:56:04,142 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 103 [2021-12-27 22:56:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:04,144 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-27 22:56:04,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2021-12-27 22:56:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-27 22:56:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-27 22:56:04,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:04,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:56:04,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 22:56:04,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1392867689, now seen corresponding path program 1 times [2021-12-27 22:56:04,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:04,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788958510] [2021-12-27 22:56:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:04,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:56:04,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:04,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788958510] [2021-12-27 22:56:04,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788958510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:04,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:04,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:56:04,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730252167] [2021-12-27 22:56:04,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:04,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:04,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:04,287 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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) [2021-12-27 22:56:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:05,975 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-12-27 22:56:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:05,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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 125 [2021-12-27 22:56:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:05,983 INFO L225 Difference]: With dead ends: 5395 [2021-12-27 22:56:05,983 INFO L226 Difference]: Without dead ends: 2701 [2021-12-27 22:56:05,987 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 [2021-12-27 22:56:05,988 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 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 [2021-12-27 22:56:05,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-27 22:56:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-12-27 22:56:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-12-27 22:56:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 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) [2021-12-27 22:56:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-12-27 22:56:06,026 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 125 [2021-12-27 22:56:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:06,027 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-12-27 22:56:06,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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) [2021-12-27 22:56:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-12-27 22:56:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-27 22:56:06,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:06,028 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, 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] [2021-12-27 22:56:06,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 22:56:06,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash -165152522, now seen corresponding path program 1 times [2021-12-27 22:56:06,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:06,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772899229] [2021-12-27 22:56:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:06,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:56:06,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:06,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772899229] [2021-12-27 22:56:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772899229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:06,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:06,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:06,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781232117] [2021-12-27 22:56:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:06,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:06,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:06,155 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2021-12-27 22:56:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:07,609 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-12-27 22:56:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 185 [2021-12-27 22:56:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:07,621 INFO L225 Difference]: With dead ends: 7108 [2021-12-27 22:56:07,621 INFO L226 Difference]: Without dead ends: 4409 [2021-12-27 22:56:07,624 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 [2021-12-27 22:56:07,625 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:07,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-27 22:56:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-12-27 22:56:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-12-27 22:56:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 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) [2021-12-27 22:56:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-12-27 22:56:07,684 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 185 [2021-12-27 22:56:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:07,685 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-12-27 22:56:07,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2021-12-27 22:56:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-12-27 22:56:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-27 22:56:07,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:07,687 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, 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] [2021-12-27 22:56:07,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 22:56:07,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash -271732261, now seen corresponding path program 1 times [2021-12-27 22:56:07,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957095628] [2021-12-27 22:56:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:07,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-27 22:56:07,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:07,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957095628] [2021-12-27 22:56:07,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957095628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:07,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:07,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:07,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17255646] [2021-12-27 22:56:07,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:07,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:07,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:07,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:07,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:07,789 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-27 22:56:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:09,231 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-12-27 22:56:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:09,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 187 [2021-12-27 22:56:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:09,250 INFO L225 Difference]: With dead ends: 10936 [2021-12-27 22:56:09,250 INFO L226 Difference]: Without dead ends: 6528 [2021-12-27 22:56:09,255 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 [2021-12-27 22:56:09,256 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 418 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:09,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-27 22:56:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-12-27 22:56:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-12-27 22:56:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 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) [2021-12-27 22:56:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-12-27 22:56:09,315 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 187 [2021-12-27 22:56:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:09,315 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-12-27 22:56:09,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-27 22:56:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-12-27 22:56:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-27 22:56:09,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:09,318 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:56:09,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 22:56:09,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash -386675243, now seen corresponding path program 1 times [2021-12-27 22:56:09,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:09,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733525479] [2021-12-27 22:56:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:09,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-27 22:56:09,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:09,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733525479] [2021-12-27 22:56:09,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733525479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:09,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:09,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:09,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080711434] [2021-12-27 22:56:09,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:09,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:09,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:09,439 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-27 22:56:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:10,977 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2021-12-27 22:56:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 253 [2021-12-27 22:56:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:10,991 INFO L225 Difference]: With dead ends: 10045 [2021-12-27 22:56:10,991 INFO L226 Difference]: Without dead ends: 5665 [2021-12-27 22:56:10,996 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 [2021-12-27 22:56:10,997 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 403 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:10,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-27 22:56:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2021-12-27 22:56:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2021-12-27 22:56:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 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) [2021-12-27 22:56:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2021-12-27 22:56:11,059 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 253 [2021-12-27 22:56:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:11,059 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2021-12-27 22:56:11,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-27 22:56:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2021-12-27 22:56:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-27 22:56:11,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:11,062 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-27 22:56:11,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 22:56:11,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:11,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2040583175, now seen corresponding path program 1 times [2021-12-27 22:56:11,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:11,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654341182] [2021-12-27 22:56:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:11,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-27 22:56:11,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:11,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654341182] [2021-12-27 22:56:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654341182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:11,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:11,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:11,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605864556] [2021-12-27 22:56:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:11,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:11,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:11,169 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2021-12-27 22:56:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:12,839 INFO L93 Difference]: Finished difference Result 13049 states and 15222 transitions. [2021-12-27 22:56:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:12,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 265 [2021-12-27 22:56:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:12,871 INFO L225 Difference]: With dead ends: 13049 [2021-12-27 22:56:12,871 INFO L226 Difference]: Without dead ends: 6942 [2021-12-27 22:56:12,877 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 [2021-12-27 22:56:12,877 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 493 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:12,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 630 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-27 22:56:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-12-27 22:56:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6512. [2021-12-27 22:56:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 1.1520503762862848) internal successors, (7501), 6511 states have internal predecessors, (7501), 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) [2021-12-27 22:56:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 7501 transitions. [2021-12-27 22:56:13,015 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 7501 transitions. Word has length 265 [2021-12-27 22:56:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:13,018 INFO L470 AbstractCegarLoop]: Abstraction has 6512 states and 7501 transitions. [2021-12-27 22:56:13,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2021-12-27 22:56:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 7501 transitions. [2021-12-27 22:56:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-27 22:56:13,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:13,021 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-12-27 22:56:13,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 22:56:13,022 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash -455120796, now seen corresponding path program 1 times [2021-12-27 22:56:13,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:13,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499296671] [2021-12-27 22:56:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:13,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-27 22:56:13,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:13,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499296671] [2021-12-27 22:56:13,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499296671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:13,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:13,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17020590] [2021-12-27 22:56:13,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:13,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:13,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:13,130 INFO L87 Difference]: Start difference. First operand 6512 states and 7501 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2021-12-27 22:56:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:14,526 INFO L93 Difference]: Finished difference Result 16010 states and 18477 transitions. [2021-12-27 22:56:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:14,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 288 [2021-12-27 22:56:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:14,553 INFO L225 Difference]: With dead ends: 16010 [2021-12-27 22:56:14,554 INFO L226 Difference]: Without dead ends: 9500 [2021-12-27 22:56:14,561 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 [2021-12-27 22:56:14,561 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 416 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:14,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 337 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-27 22:56:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9500 states. [2021-12-27 22:56:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9500 to 8644. [2021-12-27 22:56:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 1.1545759574221914) internal successors, (9979), 8643 states have internal predecessors, (9979), 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) [2021-12-27 22:56:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 9979 transitions. [2021-12-27 22:56:14,658 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 9979 transitions. Word has length 288 [2021-12-27 22:56:14,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:14,659 INFO L470 AbstractCegarLoop]: Abstraction has 8644 states and 9979 transitions. [2021-12-27 22:56:14,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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) [2021-12-27 22:56:14,659 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 9979 transitions. [2021-12-27 22:56:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-27 22:56:14,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:14,667 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:56:14,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 22:56:14,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 777395375, now seen corresponding path program 1 times [2021-12-27 22:56:14,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:14,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034976634] [2021-12-27 22:56:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:14,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-27 22:56:14,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:14,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034976634] [2021-12-27 22:56:14,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034976634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:14,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:14,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 22:56:14,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644953349] [2021-12-27 22:56:14,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:14,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:56:14,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:56:14,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 22:56:14,778 INFO L87 Difference]: Start difference. First operand 8644 states and 9979 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:56:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:17,380 INFO L93 Difference]: Finished difference Result 30559 states and 35506 transitions. [2021-12-27 22:56:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 22:56:17,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-12-27 22:56:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:17,410 INFO L225 Difference]: With dead ends: 30559 [2021-12-27 22:56:17,410 INFO L226 Difference]: Without dead ends: 21062 [2021-12-27 22:56:17,420 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 [2021-12-27 22:56:17,420 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 890 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:17,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 241 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-27 22:56:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21062 states. [2021-12-27 22:56:17,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21062 to 21022. [2021-12-27 22:56:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21022 states, 21021 states have (on average 1.142286285143428) internal successors, (24012), 21021 states have internal predecessors, (24012), 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) [2021-12-27 22:56:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21022 states to 21022 states and 24012 transitions. [2021-12-27 22:56:17,630 INFO L78 Accepts]: Start accepts. Automaton has 21022 states and 24012 transitions. Word has length 293 [2021-12-27 22:56:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:17,630 INFO L470 AbstractCegarLoop]: Abstraction has 21022 states and 24012 transitions. [2021-12-27 22:56:17,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 22:56:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 21022 states and 24012 transitions. [2021-12-27 22:56:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-27 22:56:17,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:17,636 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-27 22:56:17,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 22:56:17,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:17,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1748178961, now seen corresponding path program 1 times [2021-12-27 22:56:17,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:17,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970097618] [2021-12-27 22:56:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:17,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 256 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 22:56:17,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:17,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970097618] [2021-12-27 22:56:17,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970097618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:56:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253271900] [2021-12-27 22:56:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:17,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:56:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:56:17,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:56:17,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 22:56:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-27 22:56:17,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:56:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 248 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 22:56:18,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 22:56:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 248 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 22:56:19,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253271900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 22:56:19,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 22:56:19,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-27 22:56:19,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955283030] [2021-12-27 22:56:19,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 22:56:19,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 22:56:19,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:19,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 22:56:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-27 22:56:19,800 INFO L87 Difference]: Start difference. First operand 21022 states and 24012 transitions. Second operand has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 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) [2021-12-27 22:56:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:32,006 INFO L93 Difference]: Finished difference Result 92412 states and 105636 transitions. [2021-12-27 22:56:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-27 22:56:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 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 328 [2021-12-27 22:56:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:32,091 INFO L225 Difference]: With dead ends: 92412 [2021-12-27 22:56:32,091 INFO L226 Difference]: Without dead ends: 67985 [2021-12-27 22:56:32,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-12-27 22:56:32,108 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 7049 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 12945 mSolverCounterSat, 2773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7049 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 15718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2773 IncrementalHoareTripleChecker+Valid, 12945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:32,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7049 Valid, 510 Invalid, 15718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2773 Valid, 12945 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2021-12-27 22:56:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67985 states. [2021-12-27 22:56:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67985 to 53386. [2021-12-27 22:56:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53386 states, 53385 states have (on average 1.1439355624239018) internal successors, (61069), 53385 states have internal predecessors, (61069), 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) [2021-12-27 22:56:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53386 states to 53386 states and 61069 transitions. [2021-12-27 22:56:32,920 INFO L78 Accepts]: Start accepts. Automaton has 53386 states and 61069 transitions. Word has length 328 [2021-12-27 22:56:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:32,921 INFO L470 AbstractCegarLoop]: Abstraction has 53386 states and 61069 transitions. [2021-12-27 22:56:32,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 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) [2021-12-27 22:56:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 53386 states and 61069 transitions. [2021-12-27 22:56:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-12-27 22:56:32,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:32,950 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-27 22:56:33,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 22:56:33,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 22:56:33,152 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash -147091403, now seen corresponding path program 1 times [2021-12-27 22:56:33,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57175727] [2021-12-27 22:56:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:33,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-27 22:56:33,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57175727] [2021-12-27 22:56:33,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57175727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:33,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:33,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:33,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045781202] [2021-12-27 22:56:33,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:33,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:33,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:33,291 INFO L87 Difference]: Start difference. First operand 53386 states and 61069 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2021-12-27 22:56:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:34,878 INFO L93 Difference]: Finished difference Result 119091 states and 136469 transitions. [2021-12-27 22:56:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:34,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 396 [2021-12-27 22:56:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:34,959 INFO L225 Difference]: With dead ends: 119091 [2021-12-27 22:56:34,960 INFO L226 Difference]: Without dead ends: 65707 [2021-12-27 22:56:34,995 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 [2021-12-27 22:56:34,996 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 319 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:34,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 787 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-27 22:56:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65707 states. [2021-12-27 22:56:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65707 to 63582. [2021-12-27 22:56:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63582 states, 63581 states have (on average 1.114483886695711) internal successors, (70860), 63581 states have internal predecessors, (70860), 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) [2021-12-27 22:56:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63582 states to 63582 states and 70860 transitions. [2021-12-27 22:56:35,946 INFO L78 Accepts]: Start accepts. Automaton has 63582 states and 70860 transitions. Word has length 396 [2021-12-27 22:56:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:35,947 INFO L470 AbstractCegarLoop]: Abstraction has 63582 states and 70860 transitions. [2021-12-27 22:56:35,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2021-12-27 22:56:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 63582 states and 70860 transitions. [2021-12-27 22:56:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-12-27 22:56:35,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:35,955 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:56:35,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 22:56:35,955 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:35,956 INFO L85 PathProgramCache]: Analyzing trace with hash 749905159, now seen corresponding path program 1 times [2021-12-27 22:56:35,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:35,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141991859] [2021-12-27 22:56:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:35,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 526 proven. 80 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 22:56:36,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141991859] [2021-12-27 22:56:36,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141991859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:56:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102536790] [2021-12-27 22:56:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:36,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:56:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:56:36,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:56:36,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 22:56:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 22:56:36,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:56:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 22:56:37,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:56:37,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102536790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:37,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:56:37,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-27 22:56:37,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415386377] [2021-12-27 22:56:37,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:37,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:56:37,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:56:37,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-27 22:56:37,039 INFO L87 Difference]: Start difference. First operand 63582 states and 70860 transitions. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2021-12-27 22:56:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:39,109 INFO L93 Difference]: Finished difference Result 127162 states and 141718 transitions. [2021-12-27 22:56:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 22:56:39,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 410 [2021-12-27 22:56:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:39,183 INFO L225 Difference]: With dead ends: 127162 [2021-12-27 22:56:39,183 INFO L226 Difference]: Without dead ends: 63582 [2021-12-27 22:56:39,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-27 22:56:39,215 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 825 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:39,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 314 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-27 22:56:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63582 states. [2021-12-27 22:56:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63582 to 63157. [2021-12-27 22:56:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63157 states, 63156 states have (on average 1.114161758186079) internal successors, (70366), 63156 states have internal predecessors, (70366), 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) [2021-12-27 22:56:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63157 states to 63157 states and 70366 transitions. [2021-12-27 22:56:40,084 INFO L78 Accepts]: Start accepts. Automaton has 63157 states and 70366 transitions. Word has length 410 [2021-12-27 22:56:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:40,084 INFO L470 AbstractCegarLoop]: Abstraction has 63157 states and 70366 transitions. [2021-12-27 22:56:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2021-12-27 22:56:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 63157 states and 70366 transitions. [2021-12-27 22:56:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-27 22:56:40,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:40,095 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 22:56:40,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 22:56:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-27 22:56:40,312 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1597446720, now seen corresponding path program 1 times [2021-12-27 22:56:40,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:40,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689782143] [2021-12-27 22:56:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:40,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 360 proven. 181 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-27 22:56:40,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:40,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689782143] [2021-12-27 22:56:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689782143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 22:56:40,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540764726] [2021-12-27 22:56:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:40,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:56:40,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 22:56:40,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 22:56:40,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 22:56:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 22:56:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 22:56:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-27 22:56:41,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 22:56:41,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540764726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:41,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 22:56:41,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-27 22:56:41,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561139612] [2021-12-27 22:56:41,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:41,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 22:56:41,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 22:56:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:56:41,345 INFO L87 Difference]: Start difference. First operand 63157 states and 70366 transitions. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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) [2021-12-27 22:56:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:44,122 INFO L93 Difference]: Finished difference Result 163781 states and 182720 transitions. [2021-12-27 22:56:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 22:56:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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 458 [2021-12-27 22:56:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:44,253 INFO L225 Difference]: With dead ends: 163781 [2021-12-27 22:56:44,253 INFO L226 Difference]: Without dead ends: 100626 [2021-12-27 22:56:44,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 22:56:44,297 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 762 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:44,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 180 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-27 22:56:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100626 states. [2021-12-27 22:56:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100626 to 98494. [2021-12-27 22:56:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98494 states, 98493 states have (on average 1.1112058724985532) internal successors, (109446), 98493 states have internal predecessors, (109446), 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) [2021-12-27 22:56:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98494 states to 98494 states and 109446 transitions. [2021-12-27 22:56:45,729 INFO L78 Accepts]: Start accepts. Automaton has 98494 states and 109446 transitions. Word has length 458 [2021-12-27 22:56:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:45,730 INFO L470 AbstractCegarLoop]: Abstraction has 98494 states and 109446 transitions. [2021-12-27 22:56:45,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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) [2021-12-27 22:56:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 98494 states and 109446 transitions. [2021-12-27 22:56:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-12-27 22:56:45,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:45,742 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-27 22:56:45,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-27 22:56:45,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 22:56:45,944 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash 487505026, now seen corresponding path program 1 times [2021-12-27 22:56:45,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:45,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608218289] [2021-12-27 22:56:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:45,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-27 22:56:46,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:46,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608218289] [2021-12-27 22:56:46,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608218289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:46,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:46,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:46,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408389814] [2021-12-27 22:56:46,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:46,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:46,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:46,319 INFO L87 Difference]: Start difference. First operand 98494 states and 109446 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-12-27 22:56:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:48,325 INFO L93 Difference]: Finished difference Result 202509 states and 224564 transitions. [2021-12-27 22:56:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 489 [2021-12-27 22:56:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:48,576 INFO L225 Difference]: With dead ends: 202509 [2021-12-27 22:56:48,576 INFO L226 Difference]: Without dead ends: 100174 [2021-12-27 22:56:48,597 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 [2021-12-27 22:56:48,598 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 487 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:48,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 642 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-27 22:56:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100174 states. [2021-12-27 22:56:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100174 to 90362. [2021-12-27 22:56:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90362 states, 90361 states have (on average 1.102931574462434) internal successors, (99662), 90361 states have internal predecessors, (99662), 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) [2021-12-27 22:56:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90362 states to 90362 states and 99662 transitions. [2021-12-27 22:56:49,743 INFO L78 Accepts]: Start accepts. Automaton has 90362 states and 99662 transitions. Word has length 489 [2021-12-27 22:56:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 90362 states and 99662 transitions. [2021-12-27 22:56:49,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-12-27 22:56:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 90362 states and 99662 transitions. [2021-12-27 22:56:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-27 22:56:49,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:49,753 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-27 22:56:49,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 22:56:49,753 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1948426311, now seen corresponding path program 1 times [2021-12-27 22:56:49,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:49,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622116721] [2021-12-27 22:56:49,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:49,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-12-27 22:56:49,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622116721] [2021-12-27 22:56:49,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622116721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:49,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:49,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 22:56:49,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019056916] [2021-12-27 22:56:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:49,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:49,872 INFO L87 Difference]: Start difference. First operand 90362 states and 99662 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2021-12-27 22:56:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:52,402 INFO L93 Difference]: Finished difference Result 199471 states and 220093 transitions. [2021-12-27 22:56:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:52,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 491 [2021-12-27 22:56:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:52,548 INFO L225 Difference]: With dead ends: 199471 [2021-12-27 22:56:52,548 INFO L226 Difference]: Without dead ends: 108686 [2021-12-27 22:56:52,590 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 [2021-12-27 22:56:52,590 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 458 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:52,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 638 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-27 22:56:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108686 states. [2021-12-27 22:56:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108686 to 103547. [2021-12-27 22:56:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103547 states, 103546 states have (on average 1.0940837888474688) internal successors, (113288), 103546 states have internal predecessors, (113288), 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) [2021-12-27 22:56:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103547 states to 103547 states and 113288 transitions. [2021-12-27 22:56:53,926 INFO L78 Accepts]: Start accepts. Automaton has 103547 states and 113288 transitions. Word has length 491 [2021-12-27 22:56:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 22:56:53,927 INFO L470 AbstractCegarLoop]: Abstraction has 103547 states and 113288 transitions. [2021-12-27 22:56:53,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2021-12-27 22:56:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 103547 states and 113288 transitions. [2021-12-27 22:56:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-12-27 22:56:53,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 22:56:53,937 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-27 22:56:53,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-27 22:56:53,937 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 22:56:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 22:56:53,938 INFO L85 PathProgramCache]: Analyzing trace with hash 330176941, now seen corresponding path program 1 times [2021-12-27 22:56:53,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 22:56:53,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872009508] [2021-12-27 22:56:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 22:56:53,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 22:56:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 22:56:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2021-12-27 22:56:54,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 22:56:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872009508] [2021-12-27 22:56:54,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872009508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 22:56:54,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 22:56:54,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 22:56:54,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182851320] [2021-12-27 22:56:54,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 22:56:54,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 22:56:54,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 22:56:54,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 22:56:54,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 22:56:54,062 INFO L87 Difference]: Start difference. First operand 103547 states and 113288 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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) [2021-12-27 22:56:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 22:56:55,617 INFO L93 Difference]: Finished difference Result 200692 states and 219132 transitions. [2021-12-27 22:56:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 22:56:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 493 [2021-12-27 22:56:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 22:56:55,746 INFO L225 Difference]: With dead ends: 200692 [2021-12-27 22:56:55,746 INFO L226 Difference]: Without dead ends: 97143 [2021-12-27 22:56:55,793 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 [2021-12-27 22:56:55,794 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 604 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 22:56:55,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 94 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 22:56:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97143 states.