./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0 --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 659b37265952a16fb6d0be01d182392fcf6fa60a0b92fef60d1f2fbbad338d83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:03:43,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:03:43,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:03:43,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:03:43,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:03:43,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:03:43,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:03:43,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:03:43,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:03:43,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:03:43,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:03:43,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:03:43,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:03:43,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:03:43,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:03:43,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:03:43,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:03:43,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:03:43,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:03:43,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:03:43,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:03:43,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:03:43,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:03:43,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:03:43,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:03:43,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:03:43,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:03:43,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:03:43,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:03:43,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:03:43,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:03:43,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:03:43,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:03:43,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:03:43,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:03:43,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:03:43,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:03:43,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:03:43,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:03:43,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:03:43,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:03:43,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:03:43,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:03:43,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:03:43,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:03:43,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:03:43,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:03:43,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:03:43,670 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:03:43,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:03:43,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:03:43,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:03:43,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:03:43,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:03:43,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:03:43,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:03:43,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:03:43,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:03:43,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:03:43,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:03:43,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:03:43,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:03:43,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:03:43,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:03:43,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:03:43,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:03:43,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:03:43,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:03:43,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:03:43,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:03:43,673 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:03:43,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:03:43,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:03:43,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:03:43,676 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 659b37265952a16fb6d0be01d182392fcf6fa60a0b92fef60d1f2fbbad338d83 [2021-11-22 15:03:43,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:03:43,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:03:43,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:03:43,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:03:43,975 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:03:43,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/eca-rers2012/Problem12_label28.c [2021-11-22 15:03:44,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/data/b22ea6229/5259456ad6a24080b123d1c5589b8a4d/FLAGc616335f6 [2021-11-22 15:03:44,869 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:03:44,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/sv-benchmarks/c/eca-rers2012/Problem12_label28.c [2021-11-22 15:03:44,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/data/b22ea6229/5259456ad6a24080b123d1c5589b8a4d/FLAGc616335f6 [2021-11-22 15:03:45,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/data/b22ea6229/5259456ad6a24080b123d1c5589b8a4d [2021-11-22 15:03:45,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:03:45,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:03:45,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:03:45,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:03:45,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:03:45,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:03:45" (1/1) ... [2021-11-22 15:03:45,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a6913c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:45, skipping insertion in model container [2021-11-22 15:03:45,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:03:45" (1/1) ... [2021-11-22 15:03:45,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:03:45,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:03:45,787 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/sv-benchmarks/c/eca-rers2012/Problem12_label28.c[2824,2837] [2021-11-22 15:03:46,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:03:46,812 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:03:46,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/sv-benchmarks/c/eca-rers2012/Problem12_label28.c[2824,2837] [2021-11-22 15:03:47,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:03:47,440 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:03:47,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47 WrapperNode [2021-11-22 15:03:47,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:03:47,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:03:47,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:03:47,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:03:47,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:47,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:47,968 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-22 15:03:47,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:03:47,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:03:47,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:03:47,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:03:47,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:47,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:48,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:48,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:48,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:48,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:48,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:48,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:03:48,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:03:48,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:03:48,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:03:48,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (1/1) ... [2021-11-22 15:03:48,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:03:48,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:48,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:03:48,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:03:48,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:03:48,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:03:48,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:03:48,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:03:48,781 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:03:48,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:03:53,339 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:03:53,365 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:03:53,365 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:03:53,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:03:53 BoogieIcfgContainer [2021-11-22 15:03:53,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:03:53,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:03:53,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:03:53,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:03:53,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:03:45" (1/3) ... [2021-11-22 15:03:53,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ebcd40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:03:53, skipping insertion in model container [2021-11-22 15:03:53,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:03:47" (2/3) ... [2021-11-22 15:03:53,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ebcd40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:03:53, skipping insertion in model container [2021-11-22 15:03:53,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:03:53" (3/3) ... [2021-11-22 15:03:53,384 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label28.c [2021-11-22 15:03:53,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:03:53,391 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:03:53,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:03:53,475 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 [2021-11-22 15:03:53,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:03:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 15:03:53,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:53,525 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] [2021-11-22 15:03:53,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:03:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2021-11-22 15:03:53,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:53,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252567732] [2021-11-22 15:03:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:53,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:03:53,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:53,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252567732] [2021-11-22 15:03:53,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252567732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:03:53,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:03:53,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:03:53,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308460450] [2021-11-22 15:03:53,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:03:53,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:03:53,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:03:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:03:53,797 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:58,741 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2021-11-22 15:03:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:03:58,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 15:03:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:58,781 INFO L225 Difference]: With dead ends: 2404 [2021-11-22 15:03:58,782 INFO L226 Difference]: Without dead ends: 1506 [2021-11-22 15:03:58,793 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 [2021-11-22 15:03:58,797 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 800 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:58,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-22 15:03:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-22 15:03:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-22 15:03:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2021-11-22 15:03:58,955 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 20 [2021-11-22 15:03:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:58,956 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2021-11-22 15:03:58,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2021-11-22 15:03:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-22 15:03:58,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:58,965 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:03:58,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:03:58,966 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:03:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 523294247, now seen corresponding path program 1 times [2021-11-22 15:03:58,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:58,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687197378] [2021-11-22 15:03:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:58,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:03:59,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:59,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687197378] [2021-11-22 15:03:59,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687197378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:03:59,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:03:59,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:03:59,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744700321] [2021-11-22 15:03:59,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:03:59,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:03:59,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:03:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:03:59,267 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:03,583 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2021-11-22 15:04:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-11-22 15:04:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:03,605 INFO L225 Difference]: With dead ends: 4512 [2021-11-22 15:04:03,605 INFO L226 Difference]: Without dead ends: 3008 [2021-11-22 15:04:03,612 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 [2021-11-22 15:04:03,614 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:03,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 449 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-22 15:04:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-22 15:04:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-11-22 15:04:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4156967076820752) internal successors, (4257), 3007 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2021-11-22 15:04:03,707 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 95 [2021-11-22 15:04:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:03,709 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2021-11-22 15:04:03,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2021-11-22 15:04:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-22 15:04:03,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:03,718 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 15:04:03,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:04:03,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1367340322, now seen corresponding path program 1 times [2021-11-22 15:04:03,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632639521] [2021-11-22 15:04:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:03,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:03,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:03,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632639521] [2021-11-22 15:04:03,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632639521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:03,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:03,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:03,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577751407] [2021-11-22 15:04:03,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:03,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:04:03,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:04:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:04:03,949 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:09,674 INFO L93 Difference]: Finished difference Result 9769 states and 13601 transitions. [2021-11-22 15:04:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:04:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-22 15:04:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:09,717 INFO L225 Difference]: With dead ends: 9769 [2021-11-22 15:04:09,717 INFO L226 Difference]: Without dead ends: 6763 [2021-11-22 15:04:09,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:04:09,724 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2182 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:09,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 164 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-22 15:04:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-11-22 15:04:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2021-11-22 15:04:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3510795622596865) internal successors, (9136), 6762 states have internal predecessors, (9136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9136 transitions. [2021-11-22 15:04:09,887 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9136 transitions. Word has length 97 [2021-11-22 15:04:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:09,888 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 9136 transitions. [2021-11-22 15:04:09,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9136 transitions. [2021-11-22 15:04:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-22 15:04:09,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:09,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:09,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:04:09,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1860048002, now seen corresponding path program 1 times [2021-11-22 15:04:09,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:09,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303742547] [2021-11-22 15:04:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:09,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:10,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303742547] [2021-11-22 15:04:10,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303742547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332257815] [2021-11-22 15:04:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:10,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:10,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:10,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:04:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:10,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:04:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 15:04:10,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:04:10,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332257815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:10,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:04:10,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-22 15:04:10,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151569953] [2021-11-22 15:04:10,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:10,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:10,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:04:10,660 INFO L87 Difference]: Start difference. First operand 6763 states and 9136 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:13,782 INFO L93 Difference]: Finished difference Result 15777 states and 21149 transitions. [2021-11-22 15:04:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:13,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-22 15:04:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:13,841 INFO L225 Difference]: With dead ends: 15777 [2021-11-22 15:04:13,841 INFO L226 Difference]: Without dead ends: 9767 [2021-11-22 15:04:13,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:04:13,852 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 716 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:13,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 156 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-22 15:04:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-22 15:04:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-11-22 15:04:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.255785377841491) internal successors, (12264), 9766 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12264 transitions. [2021-11-22 15:04:14,139 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12264 transitions. Word has length 161 [2021-11-22 15:04:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:14,140 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12264 transitions. [2021-11-22 15:04:14,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12264 transitions. [2021-11-22 15:04:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-22 15:04:14,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:14,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:14,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:14,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:14,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash -943611789, now seen corresponding path program 1 times [2021-11-22 15:04:14,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:14,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854489688] [2021-11-22 15:04:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:14,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:04:14,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:14,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854489688] [2021-11-22 15:04:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854489688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:14,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:14,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:14,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853053389] [2021-11-22 15:04:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:14,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:04:14,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:04:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:04:14,572 INFO L87 Difference]: Start difference. First operand 9767 states and 12264 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:18,188 INFO L93 Difference]: Finished difference Result 21822 states and 27290 transitions. [2021-11-22 15:04:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:04:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-11-22 15:04:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:18,242 INFO L225 Difference]: With dead ends: 21822 [2021-11-22 15:04:18,242 INFO L226 Difference]: Without dead ends: 12771 [2021-11-22 15:04:18,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:04:18,251 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 3881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:18,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 616 Invalid, 3881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 3680 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-22 15:04:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-11-22 15:04:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 12020. [2021-11-22 15:04:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2021-11-22 15:04:18,511 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 168 [2021-11-22 15:04:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:18,512 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2021-11-22 15:04:18,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2021-11-22 15:04:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-22 15:04:18,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:18,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:18,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:04:18,518 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:18,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1947593425, now seen corresponding path program 1 times [2021-11-22 15:04:18,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:18,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918581373] [2021-11-22 15:04:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:18,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-22 15:04:18,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:18,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918581373] [2021-11-22 15:04:18,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918581373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:18,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:18,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:18,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316602121] [2021-11-22 15:04:18,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:18,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:18,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:18,635 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:21,879 INFO L93 Difference]: Finished difference Result 27793 states and 34552 transitions. [2021-11-22 15:04:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 232 [2021-11-22 15:04:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:21,919 INFO L225 Difference]: With dead ends: 27793 [2021-11-22 15:04:21,919 INFO L226 Difference]: Without dead ends: 16526 [2021-11-22 15:04:21,932 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 [2021-11-22 15:04:21,933 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 766 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:21,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 495 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-22 15:04:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-11-22 15:04:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 12020. [2021-11-22 15:04:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2021-11-22 15:04:22,295 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 232 [2021-11-22 15:04:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:22,295 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2021-11-22 15:04:22,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2021-11-22 15:04:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-22 15:04:22,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:22,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:22,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:04:22,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash 732612298, now seen corresponding path program 1 times [2021-11-22 15:04:22,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:22,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067230402] [2021-11-22 15:04:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:22,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-22 15:04:22,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:22,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067230402] [2021-11-22 15:04:22,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067230402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:22,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:22,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:04:22,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089040835] [2021-11-22 15:04:22,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:22,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:22,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:22,478 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:25,926 INFO L93 Difference]: Finished difference Result 31550 states and 38845 transitions. [2021-11-22 15:04:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:25,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 233 [2021-11-22 15:04:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:25,968 INFO L225 Difference]: With dead ends: 31550 [2021-11-22 15:04:25,969 INFO L226 Difference]: Without dead ends: 20283 [2021-11-22 15:04:25,981 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 [2021-11-22 15:04:25,982 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:25,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 15:04:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2021-11-22 15:04:26,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 18779. [2021-11-22 15:04:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.1888380019171372) internal successors, (22324), 18778 states have internal predecessors, (22324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 22324 transitions. [2021-11-22 15:04:26,421 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 22324 transitions. Word has length 233 [2021-11-22 15:04:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:26,422 INFO L470 AbstractCegarLoop]: Abstraction has 18779 states and 22324 transitions. [2021-11-22 15:04:26,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 22324 transitions. [2021-11-22 15:04:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-22 15:04:26,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:26,429 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-22 15:04:26,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:04:26,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1104964256, now seen corresponding path program 1 times [2021-11-22 15:04:26,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:26,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400194300] [2021-11-22 15:04:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:26,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-22 15:04:26,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:26,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400194300] [2021-11-22 15:04:26,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400194300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:26,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:26,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:26,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668482846] [2021-11-22 15:04:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:26,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:26,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:26,639 INFO L87 Difference]: Start difference. First operand 18779 states and 22324 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:29,687 INFO L93 Difference]: Finished difference Result 43564 states and 53013 transitions. [2021-11-22 15:04:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 319 [2021-11-22 15:04:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:29,739 INFO L225 Difference]: With dead ends: 43564 [2021-11-22 15:04:29,739 INFO L226 Difference]: Without dead ends: 25538 [2021-11-22 15:04:29,759 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 [2021-11-22 15:04:29,760 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-22 15:04:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25538 states. [2021-11-22 15:04:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25538 to 24036. [2021-11-22 15:04:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 1.1785313085084252) internal successors, (28326), 24035 states have internal predecessors, (28326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 28326 transitions. [2021-11-22 15:04:30,295 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 28326 transitions. Word has length 319 [2021-11-22 15:04:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:30,296 INFO L470 AbstractCegarLoop]: Abstraction has 24036 states and 28326 transitions. [2021-11-22 15:04:30,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 28326 transitions. [2021-11-22 15:04:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-22 15:04:30,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:30,306 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-22 15:04:30,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 15:04:30,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2104395386, now seen corresponding path program 1 times [2021-11-22 15:04:30,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:30,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533951366] [2021-11-22 15:04:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:30,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:04:30,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:30,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533951366] [2021-11-22 15:04:30,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533951366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:30,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591562985] [2021-11-22 15:04:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:30,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:30,493 INFO L87 Difference]: Start difference. First operand 24036 states and 28326 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:34,246 INFO L93 Difference]: Finished difference Result 60837 states and 71503 transitions. [2021-11-22 15:04:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 347 [2021-11-22 15:04:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:34,305 INFO L225 Difference]: With dead ends: 60837 [2021-11-22 15:04:34,305 INFO L226 Difference]: Without dead ends: 37554 [2021-11-22 15:04:34,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:34,325 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 636 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:34,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1246 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-22 15:04:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-11-22 15:04:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 36052. [2021-11-22 15:04:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36052 states, 36051 states have (on average 1.1641008571190814) internal successors, (41967), 36051 states have internal predecessors, (41967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36052 states to 36052 states and 41967 transitions. [2021-11-22 15:04:35,026 INFO L78 Accepts]: Start accepts. Automaton has 36052 states and 41967 transitions. Word has length 347 [2021-11-22 15:04:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:35,026 INFO L470 AbstractCegarLoop]: Abstraction has 36052 states and 41967 transitions. [2021-11-22 15:04:35,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 36052 states and 41967 transitions. [2021-11-22 15:04:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-22 15:04:35,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:35,036 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-22 15:04:35,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:04:35,037 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:35,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1921264, now seen corresponding path program 1 times [2021-11-22 15:04:35,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:35,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373221056] [2021-11-22 15:04:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:35,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-22 15:04:35,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:35,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373221056] [2021-11-22 15:04:35,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373221056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:35,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:35,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:35,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281993044] [2021-11-22 15:04:35,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:35,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:35,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:35,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:35,203 INFO L87 Difference]: Start difference. First operand 36052 states and 41967 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:38,342 INFO L93 Difference]: Finished difference Result 73604 states and 85536 transitions. [2021-11-22 15:04:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 351 [2021-11-22 15:04:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:38,396 INFO L225 Difference]: With dead ends: 73604 [2021-11-22 15:04:38,397 INFO L226 Difference]: Without dead ends: 38305 [2021-11-22 15:04:38,420 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 [2021-11-22 15:04:38,421 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 756 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:38,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 412 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-22 15:04:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2021-11-22 15:04:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 36803. [2021-11-22 15:04:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36803 states, 36802 states have (on average 1.1496929514700287) internal successors, (42311), 36802 states have internal predecessors, (42311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36803 states to 36803 states and 42311 transitions. [2021-11-22 15:04:39,436 INFO L78 Accepts]: Start accepts. Automaton has 36803 states and 42311 transitions. Word has length 351 [2021-11-22 15:04:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:39,436 INFO L470 AbstractCegarLoop]: Abstraction has 36803 states and 42311 transitions. [2021-11-22 15:04:39,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 36803 states and 42311 transitions. [2021-11-22 15:04:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-22 15:04:39,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:39,442 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-22 15:04:39,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:04:39,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash 516729510, now seen corresponding path program 1 times [2021-11-22 15:04:39,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:39,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408534161] [2021-11-22 15:04:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:39,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-22 15:04:39,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:39,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408534161] [2021-11-22 15:04:39,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408534161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:39,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:39,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:39,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420148339] [2021-11-22 15:04:39,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:39,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:39,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:39,592 INFO L87 Difference]: Start difference. First operand 36803 states and 42311 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:43,271 INFO L93 Difference]: Finished difference Result 103644 states and 119789 transitions. [2021-11-22 15:04:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2021-11-22 15:04:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:43,502 INFO L225 Difference]: With dead ends: 103644 [2021-11-22 15:04:43,502 INFO L226 Difference]: Without dead ends: 67594 [2021-11-22 15:04:43,519 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 [2021-11-22 15:04:43,520 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 708 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:43,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 1270 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 15:04:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67594 states. [2021-11-22 15:04:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67594 to 62337. [2021-11-22 15:04:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62337 states, 62336 states have (on average 1.1187917094455853) internal successors, (69741), 62336 states have internal predecessors, (69741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 69741 transitions. [2021-11-22 15:04:44,382 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 69741 transitions. Word has length 358 [2021-11-22 15:04:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:44,384 INFO L470 AbstractCegarLoop]: Abstraction has 62337 states and 69741 transitions. [2021-11-22 15:04:44,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 69741 transitions. [2021-11-22 15:04:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-22 15:04:44,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:44,398 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:44,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 15:04:44,399 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1360971435, now seen corresponding path program 1 times [2021-11-22 15:04:44,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:44,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276803864] [2021-11-22 15:04:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:44,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-22 15:04:44,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:44,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276803864] [2021-11-22 15:04:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276803864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:44,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:44,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450514528] [2021-11-22 15:04:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:44,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:44,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:44,826 INFO L87 Difference]: Start difference. First operand 62337 states and 69741 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:48,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:48,403 INFO L93 Difference]: Finished difference Result 155463 states and 175589 transitions. [2021-11-22 15:04:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:48,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 441 [2021-11-22 15:04:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:48,515 INFO L225 Difference]: With dead ends: 155463 [2021-11-22 15:04:48,515 INFO L226 Difference]: Without dead ends: 89373 [2021-11-22 15:04:48,535 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 [2021-11-22 15:04:48,536 INFO L933 BasicCegarLoop]: 1288 mSDtfsCounter, 705 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:48,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 1296 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-22 15:04:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89373 states. [2021-11-22 15:04:49,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89373 to 87120. [2021-11-22 15:04:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87120 states, 87119 states have (on average 1.1017803234656045) internal successors, (95986), 87119 states have internal predecessors, (95986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87120 states to 87120 states and 95986 transitions. [2021-11-22 15:04:49,941 INFO L78 Accepts]: Start accepts. Automaton has 87120 states and 95986 transitions. Word has length 441 [2021-11-22 15:04:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:49,942 INFO L470 AbstractCegarLoop]: Abstraction has 87120 states and 95986 transitions. [2021-11-22 15:04:49,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 87120 states and 95986 transitions. [2021-11-22 15:04:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-22 15:04:49,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:49,972 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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] [2021-11-22 15:04:49,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:04:49,973 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:49,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1041849173, now seen corresponding path program 1 times [2021-11-22 15:04:49,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:49,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87217986] [2021-11-22 15:04:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:49,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-22 15:04:50,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:50,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87217986] [2021-11-22 15:04:50,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87217986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:50,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:50,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:50,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490728014] [2021-11-22 15:04:50,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:50,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:50,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:50,206 INFO L87 Difference]: Start difference. First operand 87120 states and 95986 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:54,041 INFO L93 Difference]: Finished difference Result 212539 states and 235714 transitions. [2021-11-22 15:04:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:04:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 457 [2021-11-22 15:04:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:54,207 INFO L225 Difference]: With dead ends: 212539 [2021-11-22 15:04:54,207 INFO L226 Difference]: Without dead ends: 126172 [2021-11-22 15:04:54,242 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 [2021-11-22 15:04:54,243 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 661 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:54,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 1308 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 15:04:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126172 states. [2021-11-22 15:04:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126172 to 116409. [2021-11-22 15:04:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116409 states, 116408 states have (on average 1.0928716239433716) internal successors, (127219), 116408 states have internal predecessors, (127219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116409 states to 116409 states and 127219 transitions. [2021-11-22 15:04:56,033 INFO L78 Accepts]: Start accepts. Automaton has 116409 states and 127219 transitions. Word has length 457 [2021-11-22 15:04:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:56,033 INFO L470 AbstractCegarLoop]: Abstraction has 116409 states and 127219 transitions. [2021-11-22 15:04:56,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 116409 states and 127219 transitions. [2021-11-22 15:04:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-22 15:04:56,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:56,047 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:04:56,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 15:04:56,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:04:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash -956832560, now seen corresponding path program 1 times [2021-11-22 15:04:56,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:56,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230496090] [2021-11-22 15:04:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:56,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-11-22 15:04:56,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:56,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230496090] [2021-11-22 15:04:56,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230496090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:04:56,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:04:56,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:04:56,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242708631] [2021-11-22 15:04:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:04:56,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:04:56,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:04:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:04:56,621 INFO L87 Difference]: Start difference. First operand 116409 states and 127219 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:00,186 INFO L93 Difference]: Finished difference Result 252342 states and 276077 transitions. [2021-11-22 15:05:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 511 [2021-11-22 15:05:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:00,354 INFO L225 Difference]: With dead ends: 252342 [2021-11-22 15:05:00,354 INFO L226 Difference]: Without dead ends: 136686 [2021-11-22 15:05:00,405 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 [2021-11-22 15:05:00,406 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 854 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:00,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1117 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-22 15:05:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136686 states. [2021-11-22 15:05:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136686 to 135935. [2021-11-22 15:05:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135935 states, 135934 states have (on average 1.0855488693042212) internal successors, (147563), 135934 states have internal predecessors, (147563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135935 states to 135935 states and 147563 transitions. [2021-11-22 15:05:02,556 INFO L78 Accepts]: Start accepts. Automaton has 135935 states and 147563 transitions. Word has length 511 [2021-11-22 15:05:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:02,557 INFO L470 AbstractCegarLoop]: Abstraction has 135935 states and 147563 transitions. [2021-11-22 15:05:02,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 135935 states and 147563 transitions. [2021-11-22 15:05:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2021-11-22 15:05:02,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:02,583 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:02,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 15:05:02,584 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1427759076, now seen corresponding path program 1 times [2021-11-22 15:05:02,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:02,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413420203] [2021-11-22 15:05:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:02,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-22 15:05:02,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413420203] [2021-11-22 15:05:02,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413420203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:02,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:02,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:05:02,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534434102] [2021-11-22 15:05:02,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:02,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:02,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:02,915 INFO L87 Difference]: Start difference. First operand 135935 states and 147563 transitions. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:07,094 INFO L93 Difference]: Finished difference Result 295900 states and 324020 transitions. [2021-11-22 15:05:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:07,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 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 697 [2021-11-22 15:05:07,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:07,730 INFO L225 Difference]: With dead ends: 295900 [2021-11-22 15:05:07,730 INFO L226 Difference]: Without dead ends: 160718 [2021-11-22 15:05:07,764 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 [2021-11-22 15:05:07,766 INFO L933 BasicCegarLoop]: 1285 mSDtfsCounter, 350 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 2697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:07,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1293 Invalid, 2697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 15:05:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160718 states. [2021-11-22 15:05:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160718 to 156963. [2021-11-22 15:05:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156963 states, 156962 states have (on average 1.0800002548387508) internal successors, (169519), 156962 states have internal predecessors, (169519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156963 states to 156963 states and 169519 transitions. [2021-11-22 15:05:09,917 INFO L78 Accepts]: Start accepts. Automaton has 156963 states and 169519 transitions. Word has length 697 [2021-11-22 15:05:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:09,918 INFO L470 AbstractCegarLoop]: Abstraction has 156963 states and 169519 transitions. [2021-11-22 15:05:09,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 156963 states and 169519 transitions. [2021-11-22 15:05:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2021-11-22 15:05:09,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:09,967 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:09,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 15:05:09,968 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash 414321212, now seen corresponding path program 1 times [2021-11-22 15:05:09,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034993444] [2021-11-22 15:05:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:09,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-11-22 15:05:10,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:10,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034993444] [2021-11-22 15:05:10,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034993444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:10,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:10,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:05:10,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433880054] [2021-11-22 15:05:10,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:10,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:10,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:10,409 INFO L87 Difference]: Start difference. First operand 156963 states and 169519 transitions. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:14,804 INFO L93 Difference]: Finished difference Result 313924 states and 339037 transitions. [2021-11-22 15:05:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:14,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 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 921 [2021-11-22 15:05:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:15,020 INFO L225 Difference]: With dead ends: 313924 [2021-11-22 15:05:15,020 INFO L226 Difference]: Without dead ends: 157714 [2021-11-22 15:05:15,092 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 [2021-11-22 15:05:15,099 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 404 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2210 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 2210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:15,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 406 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 2210 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-22 15:05:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157714 states. [2021-11-22 15:05:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157714 to 155461. [2021-11-22 15:05:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155461 states, 155460 states have (on average 1.0527724173420816) internal successors, (163664), 155460 states have internal predecessors, (163664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155461 states to 155461 states and 163664 transitions. [2021-11-22 15:05:17,564 INFO L78 Accepts]: Start accepts. Automaton has 155461 states and 163664 transitions. Word has length 921 [2021-11-22 15:05:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:17,565 INFO L470 AbstractCegarLoop]: Abstraction has 155461 states and 163664 transitions. [2021-11-22 15:05:17,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 155461 states and 163664 transitions. [2021-11-22 15:05:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2021-11-22 15:05:17,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:17,725 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:17,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 15:05:17,726 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:17,726 INFO L85 PathProgramCache]: Analyzing trace with hash -391148179, now seen corresponding path program 1 times [2021-11-22 15:05:17,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:17,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230315935] [2021-11-22 15:05:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:17,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 1226 proven. 240 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-22 15:05:18,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:18,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230315935] [2021-11-22 15:05:18,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230315935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:18,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673012000] [2021-11-22 15:05:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:18,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:18,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:18,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:18,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:05:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:18,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:05:18,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 1247 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-11-22 15:05:20,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:05:20,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673012000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:20,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:05:20,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-22 15:05:20,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360690595] [2021-11-22 15:05:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:20,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:20,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:20,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:05:20,503 INFO L87 Difference]: Start difference. First operand 155461 states and 163664 transitions. Second operand has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:24,131 INFO L93 Difference]: Finished difference Result 313173 states and 329632 transitions. [2021-11-22 15:05:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 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 1072 [2021-11-22 15:05:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:24,327 INFO L225 Difference]: With dead ends: 313173 [2021-11-22 15:05:24,327 INFO L226 Difference]: Without dead ends: 156963 [2021-11-22 15:05:24,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:05:24,402 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 673 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:24,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1361 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-22 15:05:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156963 states. [2021-11-22 15:05:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156963 to 144196. [2021-11-22 15:05:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144196 states, 144195 states have (on average 1.0464717916710011) internal successors, (150896), 144195 states have internal predecessors, (150896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144196 states to 144196 states and 150896 transitions. [2021-11-22 15:05:26,781 INFO L78 Accepts]: Start accepts. Automaton has 144196 states and 150896 transitions. Word has length 1072 [2021-11-22 15:05:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 144196 states and 150896 transitions. [2021-11-22 15:05:26,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 144196 states and 150896 transitions. [2021-11-22 15:05:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2021-11-22 15:05:26,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:26,843 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:26,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 15:05:27,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d840d7-db2d-46f8-9d84-103335efb089/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:27,057 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1980384703, now seen corresponding path program 1 times [2021-11-22 15:05:27,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:27,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681260250] [2021-11-22 15:05:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:27,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 1264 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-22 15:05:27,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:27,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681260250] [2021-11-22 15:05:27,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681260250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:27,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:27,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:05:27,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481963930] [2021-11-22 15:05:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:27,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:05:27,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:05:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:27,462 INFO L87 Difference]: Start difference. First operand 144196 states and 150896 transitions. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:31,195 INFO L93 Difference]: Finished difference Result 289892 states and 303316 transitions. [2021-11-22 15:05:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:05:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1084 [2021-11-22 15:05:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:31,378 INFO L225 Difference]: With dead ends: 289892 [2021-11-22 15:05:31,378 INFO L226 Difference]: Without dead ends: 146449 [2021-11-22 15:05:31,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:05:31,435 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 787 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:31,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 890 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-22 15:05:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146449 states. [2021-11-22 15:05:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146449 to 141943. [2021-11-22 15:05:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141943 states, 141942 states have (on average 1.0411858364684168) internal successors, (147788), 141942 states have internal predecessors, (147788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141943 states to 141943 states and 147788 transitions. [2021-11-22 15:05:34,018 INFO L78 Accepts]: Start accepts. Automaton has 141943 states and 147788 transitions. Word has length 1084 [2021-11-22 15:05:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:34,018 INFO L470 AbstractCegarLoop]: Abstraction has 141943 states and 147788 transitions. [2021-11-22 15:05:34,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 141943 states and 147788 transitions. [2021-11-22 15:05:34,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2021-11-22 15:05:34,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:34,076 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:34,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 15:05:34,076 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:05:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:34,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1250555739, now seen corresponding path program 1 times [2021-11-22 15:05:34,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:34,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789368856] [2021-11-22 15:05:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:34,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 1506 proven. 0 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-22 15:05:34,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789368856] [2021-11-22 15:05:34,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789368856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:34,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:34,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:05:34,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534538031] [2021-11-22 15:05:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:34,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:05:34,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:05:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:05:34,664 INFO L87 Difference]: Start difference. First operand 141943 states and 147788 transitions. Second operand has 6 states, 6 states have (on average 142.5) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)