./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label56.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3 --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 27eb4e74e0a8b2d61c6b40ca1982d025901a15db ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:06:10,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:10,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:10,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:10,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:10,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:10,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:10,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:10,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:10,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:10,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:10,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:10,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:10,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:10,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:10,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:10,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:10,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:10,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:10,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:10,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:10,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:10,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:10,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:10,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:10,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:10,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:10,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:10,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:10,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:10,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:10,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:10,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:10,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:10,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:10,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:10,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:10,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:10,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:10,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:10,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:10,183 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:10,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:10,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:10,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:10,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:10,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:10,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:10,238 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:10,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:10,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:10,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:10,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:10,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:10,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:10,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:10,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:10,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:10,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:10,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:10,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:10,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:10,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:10,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:10,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:10,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:10,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:10,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:10,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:10,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:10,243 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:10,244 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:10,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:10,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:10,245 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_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27eb4e74e0a8b2d61c6b40ca1982d025901a15db [2021-10-15 19:06:10,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:10,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:10,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:10,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:10,537 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:10,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem16_label56.c [2021-10-15 19:06:10,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/data/b88604f2a/5b3f2539a14c4e2883b36539792447c8/FLAG6f7f85e48 [2021-10-15 19:06:11,226 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:11,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/sv-benchmarks/c/eca-rers2012/Problem16_label56.c [2021-10-15 19:06:11,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/data/b88604f2a/5b3f2539a14c4e2883b36539792447c8/FLAG6f7f85e48 [2021-10-15 19:06:11,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/data/b88604f2a/5b3f2539a14c4e2883b36539792447c8 [2021-10-15 19:06:11,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:11,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:11,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:11,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:11,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:11,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b24481e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:11, skipping insertion in model container [2021-10-15 19:06:11,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:11" (1/1) ... [2021-10-15 19:06:11,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:11,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:11,776 WARN L228 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_c13bc388-2ae3-461c-be11-37270696e23f/sv-benchmarks/c/eca-rers2012/Problem16_label56.c[3626,3639] [2021-10-15 19:06:12,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:12,214 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:12,232 WARN L228 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_c13bc388-2ae3-461c-be11-37270696e23f/sv-benchmarks/c/eca-rers2012/Problem16_label56.c[3626,3639] [2021-10-15 19:06:12,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:12,501 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:12,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12 WrapperNode [2021-10-15 19:06:12,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:12,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:12,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:12,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:12,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:12,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:12,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:12,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:12,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:12,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:12,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:12,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:12,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (1/1) ... [2021-10-15 19:06:12,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:12,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:12,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:12,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:15,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:15,365 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-15 19:06:15,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:15 BoogieIcfgContainer [2021-10-15 19:06:15,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:15,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:15,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:15,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:15,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:11" (1/3) ... [2021-10-15 19:06:15,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bae42a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:15, skipping insertion in model container [2021-10-15 19:06:15,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:12" (2/3) ... [2021-10-15 19:06:15,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bae42a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:15, skipping insertion in model container [2021-10-15 19:06:15,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:15" (3/3) ... [2021-10-15 19:06:15,379 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label56.c [2021-10-15 19:06:15,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:15,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:06:15,440 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:15,447 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, mConcurrency=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 [2021-10-15 19:06:15,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:06:15,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 396 places, 723 transitions, 1446 flow [2021-10-15 19:06:15,626 INFO L129 PetriNetUnfolder]: 328/723 cut-off events. [2021-10-15 19:06:15,627 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:15,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 723 events. 328/723 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 401 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 0. Up to 221 conditions per place. [2021-10-15 19:06:15,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 723 transitions, 1446 flow [2021-10-15 19:06:15,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 393 places, 718 transitions, 1436 flow [2021-10-15 19:06:15,664 INFO L129 PetriNetUnfolder]: 28/88 cut-off events. [2021-10-15 19:06:15,665 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:15,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:15,666 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:15,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:15,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2113343065, now seen corresponding path program 1 times [2021-10-15 19:06:15,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:15,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055718602] [2021-10-15 19:06:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:15,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:15,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:15,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055718602] [2021-10-15 19:06:15,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055718602] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:15,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:15,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:15,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177782237] [2021-10-15 19:06:15,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:15,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:15,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:15,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 718 transitions, 1436 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:15,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:15,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:15,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:18,324 INFO L129 PetriNetUnfolder]: 386/1107 cut-off events. [2021-10-15 19:06:18,324 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:18,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2206 conditions, 1107 events. 386/1107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1156 event pairs, 0 based on Foata normal form. 61/722 useless extension candidates. Maximal degree in co-relation 1. Up to 700 conditions per place. [2021-10-15 19:06:18,335 INFO L132 encePairwiseOnDemand]: 336/723 looper letters, 903 selfloop transitions, 133 changer transitions 61/1103 dead transitions. [2021-10-15 19:06:18,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1103 transitions, 4400 flow [2021-10-15 19:06:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1389 transitions. [2021-10-15 19:06:18,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.640387275242047 [2021-10-15 19:06:18,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1389 transitions. [2021-10-15 19:06:18,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1389 transitions. [2021-10-15 19:06:18,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:18,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1389 transitions. [2021-10-15 19:06:18,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 463.0) internal successors, (1389), 3 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,397 INFO L186 Difference]: Start difference. First operand has 393 places, 718 transitions, 1436 flow. Second operand 3 states and 1389 transitions. [2021-10-15 19:06:18,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1103 transitions, 4400 flow [2021-10-15 19:06:18,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1103 transitions, 4400 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:18,438 INFO L242 Difference]: Finished difference. Result has 397 places, 717 transitions, 2472 flow [2021-10-15 19:06:18,441 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2472, PETRI_PLACES=397, PETRI_TRANSITIONS=717} [2021-10-15 19:06:18,442 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, 4 predicate places. [2021-10-15 19:06:18,443 INFO L470 AbstractCegarLoop]: Abstraction has has 397 places, 717 transitions, 2472 flow [2021-10-15 19:06:18,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,443 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:18,444 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:18,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:06:18,444 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1042759933, now seen corresponding path program 1 times [2021-10-15 19:06:18,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:18,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951164229] [2021-10-15 19:06:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:18,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:18,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:18,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951164229] [2021-10-15 19:06:18,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951164229] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:18,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:18,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:18,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15324141] [2021-10-15 19:06:18,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:18,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:18,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:18,642 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:18,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 717 transitions, 2472 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:18,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:18,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:18,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:20,869 INFO L129 PetriNetUnfolder]: 373/1363 cut-off events. [2021-10-15 19:06:20,869 INFO L130 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2021-10-15 19:06:20,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 1363 events. 373/1363 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1866 event pairs, 0 based on Foata normal form. 132/1495 useless extension candidates. Maximal degree in co-relation 1438. Up to 979 conditions per place. [2021-10-15 19:06:20,880 INFO L132 encePairwiseOnDemand]: 590/723 looper letters, 900 selfloop transitions, 124 changer transitions 0/1030 dead transitions. [2021-10-15 19:06:20,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1030 transitions, 5172 flow [2021-10-15 19:06:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2021-10-15 19:06:20,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4900875979714154 [2021-10-15 19:06:20,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2021-10-15 19:06:20,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2021-10-15 19:06:20,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:20,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2021-10-15 19:06:20,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,903 INFO L186 Difference]: Start difference. First operand has 397 places, 717 transitions, 2472 flow. Second operand 3 states and 1063 transitions. [2021-10-15 19:06:20,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1030 transitions, 5172 flow [2021-10-15 19:06:20,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1030 transitions, 4856 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:20,953 INFO L242 Difference]: Finished difference. Result has 339 places, 705 transitions, 2792 flow [2021-10-15 19:06:20,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2792, PETRI_PLACES=339, PETRI_TRANSITIONS=705} [2021-10-15 19:06:20,956 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -54 predicate places. [2021-10-15 19:06:20,956 INFO L470 AbstractCegarLoop]: Abstraction has has 339 places, 705 transitions, 2792 flow [2021-10-15 19:06:20,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:20,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:20,957 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:20,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:06:20,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 479254088, now seen corresponding path program 1 times [2021-10-15 19:06:20,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:20,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112884959] [2021-10-15 19:06:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:20,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:21,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:21,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112884959] [2021-10-15 19:06:21,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112884959] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:21,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:21,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:21,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515355160] [2021-10-15 19:06:21,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:21,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:21,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:21,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:21,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 705 transitions, 2792 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:21,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:21,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:21,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:23,518 INFO L129 PetriNetUnfolder]: 487/2464 cut-off events. [2021-10-15 19:06:23,518 INFO L130 PetriNetUnfolder]: For 876/876 co-relation queries the response was YES. [2021-10-15 19:06:23,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5801 conditions, 2464 events. 487/2464 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 6353 event pairs, 0 based on Foata normal form. 259/2723 useless extension candidates. Maximal degree in co-relation 3595. Up to 1332 conditions per place. [2021-10-15 19:06:23,534 INFO L132 encePairwiseOnDemand]: 457/723 looper letters, 829 selfloop transitions, 309 changer transitions 0/1144 dead transitions. [2021-10-15 19:06:23,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1144 transitions, 6352 flow [2021-10-15 19:06:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1208 transitions. [2021-10-15 19:06:23,540 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569386814200092 [2021-10-15 19:06:23,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1208 transitions. [2021-10-15 19:06:23,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1208 transitions. [2021-10-15 19:06:23,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:23,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1208 transitions. [2021-10-15 19:06:23,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.6666666666667) internal successors, (1208), 3 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,554 INFO L186 Difference]: Start difference. First operand has 339 places, 705 transitions, 2792 flow. Second operand 3 states and 1208 transitions. [2021-10-15 19:06:23,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1144 transitions, 6352 flow [2021-10-15 19:06:23,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1144 transitions, 6038 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:23,602 INFO L242 Difference]: Finished difference. Result has 341 places, 819 transitions, 4706 flow [2021-10-15 19:06:23,604 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4706, PETRI_PLACES=341, PETRI_TRANSITIONS=819} [2021-10-15 19:06:23,604 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -52 predicate places. [2021-10-15 19:06:23,604 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 819 transitions, 4706 flow [2021-10-15 19:06:23,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:23,605 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:23,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:06:23,605 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1162788624, now seen corresponding path program 1 times [2021-10-15 19:06:23,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:23,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025051783] [2021-10-15 19:06:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:23,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-10-15 19:06:23,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:23,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025051783] [2021-10-15 19:06:23,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025051783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:23,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:23,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:23,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577415727] [2021-10-15 19:06:23,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:23,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:23,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:23,781 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:23,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 819 transitions, 4706 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:23,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:23,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:23,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:27,073 INFO L129 PetriNetUnfolder]: 560/3195 cut-off events. [2021-10-15 19:06:27,073 INFO L130 PetriNetUnfolder]: For 2407/2407 co-relation queries the response was YES. [2021-10-15 19:06:27,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8096 conditions, 3195 events. 560/3195 cut-off events. For 2407/2407 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8401 event pairs, 0 based on Foata normal form. 192/3387 useless extension candidates. Maximal degree in co-relation 3303. Up to 2460 conditions per place. [2021-10-15 19:06:27,092 INFO L132 encePairwiseOnDemand]: 518/723 looper letters, 986 selfloop transitions, 225 changer transitions 0/1217 dead transitions. [2021-10-15 19:06:27,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1217 transitions, 8324 flow [2021-10-15 19:06:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1142 transitions. [2021-10-15 19:06:27,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5265099124020286 [2021-10-15 19:06:27,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1142 transitions. [2021-10-15 19:06:27,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1142 transitions. [2021-10-15 19:06:27,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:27,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1142 transitions. [2021-10-15 19:06:27,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:27,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:27,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:27,113 INFO L186 Difference]: Start difference. First operand has 341 places, 819 transitions, 4706 flow. Second operand 3 states and 1142 transitions. [2021-10-15 19:06:27,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1217 transitions, 8324 flow [2021-10-15 19:06:27,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1217 transitions, 7612 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:27,167 INFO L242 Difference]: Finished difference. Result has 343 places, 892 transitions, 5678 flow [2021-10-15 19:06:27,169 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5678, PETRI_PLACES=343, PETRI_TRANSITIONS=892} [2021-10-15 19:06:27,169 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -50 predicate places. [2021-10-15 19:06:27,169 INFO L470 AbstractCegarLoop]: Abstraction has has 343 places, 892 transitions, 5678 flow [2021-10-15 19:06:27,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:27,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:27,171 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:27,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:06:27,171 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:27,172 INFO L82 PathProgramCache]: Analyzing trace with hash -930558623, now seen corresponding path program 1 times [2021-10-15 19:06:27,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:27,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374923265] [2021-10-15 19:06:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:27,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-10-15 19:06:27,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:27,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374923265] [2021-10-15 19:06:27,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374923265] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:27,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:27,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:27,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51486774] [2021-10-15 19:06:27,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:27,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:27,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:27,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 892 transitions, 5678 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:27,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:27,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:27,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:32,183 INFO L129 PetriNetUnfolder]: 981/6250 cut-off events. [2021-10-15 19:06:32,183 INFO L130 PetriNetUnfolder]: For 4994/4994 co-relation queries the response was YES. [2021-10-15 19:06:32,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15861 conditions, 6250 events. 981/6250 cut-off events. For 4994/4994 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 28405 event pairs, 0 based on Foata normal form. 138/6388 useless extension candidates. Maximal degree in co-relation 8543. Up to 3312 conditions per place. [2021-10-15 19:06:32,210 INFO L132 encePairwiseOnDemand]: 482/723 looper letters, 1175 selfloop transitions, 458 changer transitions 0/1639 dead transitions. [2021-10-15 19:06:32,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1639 transitions, 13386 flow [2021-10-15 19:06:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:06:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:06:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1208 transitions. [2021-10-15 19:06:32,217 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569386814200092 [2021-10-15 19:06:32,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1208 transitions. [2021-10-15 19:06:32,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1208 transitions. [2021-10-15 19:06:32,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:32,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1208 transitions. [2021-10-15 19:06:32,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.6666666666667) internal successors, (1208), 3 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,232 INFO L186 Difference]: Start difference. First operand has 343 places, 892 transitions, 5678 flow. Second operand 3 states and 1208 transitions. [2021-10-15 19:06:32,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1639 transitions, 13386 flow [2021-10-15 19:06:32,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1639 transitions, 11770 flow, removed 407 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:32,320 INFO L242 Difference]: Finished difference. Result has 345 places, 1263 transitions, 10170 flow [2021-10-15 19:06:32,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=10170, PETRI_PLACES=345, PETRI_TRANSITIONS=1263} [2021-10-15 19:06:32,322 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -48 predicate places. [2021-10-15 19:06:32,322 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 1263 transitions, 10170 flow [2021-10-15 19:06:32,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:32,323 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:06:32,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:06:32,324 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash -569574006, now seen corresponding path program 1 times [2021-10-15 19:06:32,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:32,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29983219] [2021-10-15 19:06:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:32,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-15 19:06:32,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:32,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29983219] [2021-10-15 19:06:32,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29983219] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:32,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:32,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:32,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148047448] [2021-10-15 19:06:32,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:32,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:32,586 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 723 [2021-10-15 19:06:32,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1263 transitions, 10170 flow. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:32,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:32,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 723 [2021-10-15 19:06:32,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:38,080 INFO L129 PetriNetUnfolder]: 975/6288 cut-off events. [2021-10-15 19:06:38,080 INFO L130 PetriNetUnfolder]: For 6362/6362 co-relation queries the response was YES. [2021-10-15 19:06:38,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16432 conditions, 6288 events. 975/6288 cut-off events. For 6362/6362 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 26689 event pairs, 0 based on Foata normal form. 6/6294 useless extension candidates. Maximal degree in co-relation 6633. Up to 5179 conditions per place. [2021-10-15 19:06:38,105 INFO L132 encePairwiseOnDemand]: 531/723 looper letters, 905 selfloop transitions, 677 changer transitions 0/1587 dead transitions. [2021-10-15 19:06:38,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1587 transitions, 13946 flow [2021-10-15 19:06:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:06:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:06:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 972 transitions. [2021-10-15 19:06:38,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2688796680497925 [2021-10-15 19:06:38,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 972 transitions. [2021-10-15 19:06:38,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 972 transitions. [2021-10-15 19:06:38,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:38,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 972 transitions. [2021-10-15 19:06:38,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.4) internal successors, (972), 5 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:38,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:38,125 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:38,126 INFO L186 Difference]: Start difference. First operand has 345 places, 1263 transitions, 10170 flow. Second operand 5 states and 972 transitions. [2021-10-15 19:06:38,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1587 transitions, 13946 flow [2021-10-15 19:06:38,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1587 transitions, 13032 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:06:38,220 INFO L242 Difference]: Finished difference. Result has 350 places, 1262 transitions, 11262 flow [2021-10-15 19:06:38,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=9204, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11262, PETRI_PLACES=350, PETRI_TRANSITIONS=1262} [2021-10-15 19:06:38,223 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -43 predicate places. [2021-10-15 19:06:38,223 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 1262 transitions, 11262 flow [2021-10-15 19:06:38,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:38,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:38,224 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:38,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:06:38,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash -630304164, now seen corresponding path program 1 times [2021-10-15 19:06:38,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:38,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268351568] [2021-10-15 19:06:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:38,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-15 19:06:38,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:38,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268351568] [2021-10-15 19:06:38,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268351568] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:38,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:38,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:06:38,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079499247] [2021-10-15 19:06:38,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:06:38,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:06:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:06:38,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:38,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1262 transitions, 11262 flow. Second operand has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:38,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:38,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:38,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:44,420 INFO L129 PetriNetUnfolder]: 961/6139 cut-off events. [2021-10-15 19:06:44,420 INFO L130 PetriNetUnfolder]: For 10250/10250 co-relation queries the response was YES. [2021-10-15 19:06:44,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16372 conditions, 6139 events. 961/6139 cut-off events. For 10250/10250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 25664 event pairs, 0 based on Foata normal form. 2/6141 useless extension candidates. Maximal degree in co-relation 14282. Up to 3536 conditions per place. [2021-10-15 19:06:44,447 INFO L132 encePairwiseOnDemand]: 537/723 looper letters, 911 selfloop transitions, 63 changer transitions 687/1669 dead transitions. [2021-10-15 19:06:44,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1669 transitions, 15294 flow [2021-10-15 19:06:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:06:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:06:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1102 transitions. [2021-10-15 19:06:44,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.21774352894684845 [2021-10-15 19:06:44,454 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1102 transitions. [2021-10-15 19:06:44,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1102 transitions. [2021-10-15 19:06:44,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:44,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1102 transitions. [2021-10-15 19:06:44,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 157.42857142857142) internal successors, (1102), 7 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,470 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,470 INFO L186 Difference]: Start difference. First operand has 350 places, 1262 transitions, 11262 flow. Second operand 7 states and 1102 transitions. [2021-10-15 19:06:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1669 transitions, 15294 flow [2021-10-15 19:06:44,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1669 transitions, 15260 flow, removed 17 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:44,647 INFO L242 Difference]: Finished difference. Result has 360 places, 657 transitions, 4530 flow [2021-10-15 19:06:44,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=11102, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4530, PETRI_PLACES=360, PETRI_TRANSITIONS=657} [2021-10-15 19:06:44,649 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -33 predicate places. [2021-10-15 19:06:44,655 INFO L470 AbstractCegarLoop]: Abstraction has has 360 places, 657 transitions, 4530 flow [2021-10-15 19:06:44,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:44,656 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:44,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:06:44,657 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1569956550, now seen corresponding path program 1 times [2021-10-15 19:06:44,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:44,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924690128] [2021-10-15 19:06:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:44,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-15 19:06:44,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:44,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924690128] [2021-10-15 19:06:44,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924690128] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:44,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:44,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:44,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078047516] [2021-10-15 19:06:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:44,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:44,971 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:44,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 657 transitions, 4530 flow. Second operand has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:44,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:44,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:52,313 INFO L129 PetriNetUnfolder]: 596/9557 cut-off events. [2021-10-15 19:06:52,313 INFO L130 PetriNetUnfolder]: For 8369/8369 co-relation queries the response was YES. [2021-10-15 19:06:52,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21887 conditions, 9557 events. 596/9557 cut-off events. For 8369/8369 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 54986 event pairs, 0 based on Foata normal form. 104/9661 useless extension candidates. Maximal degree in co-relation 16111. Up to 4519 conditions per place. [2021-10-15 19:06:52,356 INFO L132 encePairwiseOnDemand]: 617/723 looper letters, 1196 selfloop transitions, 351 changer transitions 0/1555 dead transitions. [2021-10-15 19:06:52,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1555 transitions, 11849 flow [2021-10-15 19:06:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1327 transitions. [2021-10-15 19:06:52,363 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45885200553250344 [2021-10-15 19:06:52,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1327 transitions. [2021-10-15 19:06:52,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1327 transitions. [2021-10-15 19:06:52,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:52,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1327 transitions. [2021-10-15 19:06:52,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.75) internal successors, (1327), 4 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:52,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:52,378 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:52,378 INFO L186 Difference]: Start difference. First operand has 360 places, 657 transitions, 4530 flow. Second operand 4 states and 1327 transitions. [2021-10-15 19:06:52,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1555 transitions, 11849 flow [2021-10-15 19:06:52,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1555 transitions, 11719 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-10-15 19:06:52,469 INFO L242 Difference]: Finished difference. Result has 357 places, 896 transitions, 9038 flow [2021-10-15 19:06:52,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=9038, PETRI_PLACES=357, PETRI_TRANSITIONS=896} [2021-10-15 19:06:52,470 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -36 predicate places. [2021-10-15 19:06:52,470 INFO L470 AbstractCegarLoop]: Abstraction has has 357 places, 896 transitions, 9038 flow [2021-10-15 19:06:52,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:52,471 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:52,472 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-10-15 19:06:52,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:06:52,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:06:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash 571424121, now seen corresponding path program 1 times [2021-10-15 19:06:52,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:52,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296478371] [2021-10-15 19:06:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:52,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-15 19:06:52,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:52,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296478371] [2021-10-15 19:06:52,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296478371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:52,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:52,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:52,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059095552] [2021-10-15 19:06:52,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:06:52,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:06:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:06:52,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:06:52,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 896 transitions, 9038 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:52,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:52,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:06:52,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:03,308 INFO L129 PetriNetUnfolder]: 880/13487 cut-off events. [2021-10-15 19:07:03,308 INFO L130 PetriNetUnfolder]: For 19343/19343 co-relation queries the response was YES. [2021-10-15 19:07:03,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32265 conditions, 13487 events. 880/13487 cut-off events. For 19343/19343 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 81655 event pairs, 0 based on Foata normal form. 99/13586 useless extension candidates. Maximal degree in co-relation 22348. Up to 9337 conditions per place. [2021-10-15 19:07:03,353 INFO L132 encePairwiseOnDemand]: 617/723 looper letters, 1089 selfloop transitions, 395 changer transitions 0/1492 dead transitions. [2021-10-15 19:07:03,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1492 transitions, 16645 flow [2021-10-15 19:07:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2021-10-15 19:07:03,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4094052558782849 [2021-10-15 19:07:03,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2021-10-15 19:07:03,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2021-10-15 19:07:03,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:03,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2021-10-15 19:07:03,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:03,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:03,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:03,368 INFO L186 Difference]: Start difference. First operand has 357 places, 896 transitions, 9038 flow. Second operand 3 states and 888 transitions. [2021-10-15 19:07:03,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1492 transitions, 16645 flow [2021-10-15 19:07:03,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1492 transitions, 16645 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:07:03,493 INFO L242 Difference]: Finished difference. Result has 361 places, 1167 transitions, 15209 flow [2021-10-15 19:07:03,495 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=8987, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15209, PETRI_PLACES=361, PETRI_TRANSITIONS=1167} [2021-10-15 19:07:03,495 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -32 predicate places. [2021-10-15 19:07:03,496 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 1167 transitions, 15209 flow [2021-10-15 19:07:03,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:03,496 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:03,497 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:07:03,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:07:03,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1907997465, now seen corresponding path program 1 times [2021-10-15 19:07:03,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:03,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48597282] [2021-10-15 19:07:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:03,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 1092 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-10-15 19:07:03,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:03,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48597282] [2021-10-15 19:07:03,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48597282] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:03,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:03,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:03,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875064714] [2021-10-15 19:07:03,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:07:03,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:07:03,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:07:03,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:03,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1167 transitions, 15209 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:03,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:03,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:03,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:17,835 INFO L129 PetriNetUnfolder]: 877/13484 cut-off events. [2021-10-15 19:07:17,835 INFO L130 PetriNetUnfolder]: For 25337/25337 co-relation queries the response was YES. [2021-10-15 19:07:17,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33387 conditions, 13484 events. 877/13484 cut-off events. For 25337/25337 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 79511 event pairs, 0 based on Foata normal form. 3/13487 useless extension candidates. Maximal degree in co-relation 23177. Up to 12578 conditions per place. [2021-10-15 19:07:17,890 INFO L132 encePairwiseOnDemand]: 716/723 looper letters, 1478 selfloop transitions, 5 changer transitions 0/1491 dead transitions. [2021-10-15 19:07:17,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1491 transitions, 18803 flow [2021-10-15 19:07:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 790 transitions. [2021-10-15 19:07:17,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36422314430613184 [2021-10-15 19:07:17,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 790 transitions. [2021-10-15 19:07:17,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 790 transitions. [2021-10-15 19:07:17,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:17,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 790 transitions. [2021-10-15 19:07:17,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:17,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:17,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:17,906 INFO L186 Difference]: Start difference. First operand has 361 places, 1167 transitions, 15209 flow. Second operand 3 states and 790 transitions. [2021-10-15 19:07:17,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1491 transitions, 18803 flow [2021-10-15 19:07:18,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1491 transitions, 17371 flow, removed 323 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:18,050 INFO L242 Difference]: Finished difference. Result has 362 places, 1165 transitions, 13755 flow [2021-10-15 19:07:18,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13738, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=13755, PETRI_PLACES=362, PETRI_TRANSITIONS=1165} [2021-10-15 19:07:18,053 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -31 predicate places. [2021-10-15 19:07:18,053 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 1165 transitions, 13755 flow [2021-10-15 19:07:18,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:18,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:18,054 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:07:18,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:07:18,055 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:18,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:18,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1686983655, now seen corresponding path program 1 times [2021-10-15 19:07:18,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:18,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985386840] [2021-10-15 19:07:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:18,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 1127 proven. 0 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2021-10-15 19:07:18,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:18,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985386840] [2021-10-15 19:07:18,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985386840] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:18,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:18,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282781802] [2021-10-15 19:07:18,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:18,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:18,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:18,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:18,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1165 transitions, 13755 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:18,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:18,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:18,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:34,494 INFO L129 PetriNetUnfolder]: 900/16489 cut-off events. [2021-10-15 19:07:34,494 INFO L130 PetriNetUnfolder]: For 26464/26464 co-relation queries the response was YES. [2021-10-15 19:07:34,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38751 conditions, 16489 events. 900/16489 cut-off events. For 26464/26464 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 105658 event pairs, 0 based on Foata normal form. 311/16800 useless extension candidates. Maximal degree in co-relation 26790. Up to 12449 conditions per place. [2021-10-15 19:07:34,548 INFO L132 encePairwiseOnDemand]: 618/723 looper letters, 1315 selfloop transitions, 193 changer transitions 0/1516 dead transitions. [2021-10-15 19:07:34,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1516 transitions, 17782 flow [2021-10-15 19:07:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2021-10-15 19:07:34,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4094052558782849 [2021-10-15 19:07:34,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2021-10-15 19:07:34,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2021-10-15 19:07:34,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:34,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2021-10-15 19:07:34,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,561 INFO L186 Difference]: Start difference. First operand has 362 places, 1165 transitions, 13755 flow. Second operand 3 states and 888 transitions. [2021-10-15 19:07:34,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1516 transitions, 17782 flow [2021-10-15 19:07:34,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1516 transitions, 17773 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:07:34,667 INFO L242 Difference]: Finished difference. Result has 365 places, 1191 transitions, 15431 flow [2021-10-15 19:07:34,669 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13250, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15431, PETRI_PLACES=365, PETRI_TRANSITIONS=1191} [2021-10-15 19:07:34,669 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -28 predicate places. [2021-10-15 19:07:34,669 INFO L470 AbstractCegarLoop]: Abstraction has has 365 places, 1191 transitions, 15431 flow [2021-10-15 19:07:34,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:34,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:34,671 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:07:34,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:07:34,671 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:34,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1879071471, now seen corresponding path program 1 times [2021-10-15 19:07:34,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:34,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270776419] [2021-10-15 19:07:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:34,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 1176 proven. 0 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2021-10-15 19:07:35,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:35,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270776419] [2021-10-15 19:07:35,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270776419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:35,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:35,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:35,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850583935] [2021-10-15 19:07:35,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:35,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:35,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:35,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1191 transitions, 15431 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:35,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:35,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:35,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:07:57,192 INFO L129 PetriNetUnfolder]: 886/21105 cut-off events. [2021-10-15 19:07:57,193 INFO L130 PetriNetUnfolder]: For 34441/34441 co-relation queries the response was YES. [2021-10-15 19:07:57,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48522 conditions, 21105 events. 886/21105 cut-off events. For 34441/34441 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 131430 event pairs, 0 based on Foata normal form. 371/21476 useless extension candidates. Maximal degree in co-relation 36613. Up to 15336 conditions per place. [2021-10-15 19:07:57,261 INFO L132 encePairwiseOnDemand]: 633/723 looper letters, 1315 selfloop transitions, 137 changer transitions 43/1503 dead transitions. [2021-10-15 19:07:57,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1503 transitions, 18790 flow [2021-10-15 19:07:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:07:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:07:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2021-10-15 19:07:57,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4001844167819272 [2021-10-15 19:07:57,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2021-10-15 19:07:57,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2021-10-15 19:07:57,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:07:57,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2021-10-15 19:07:57,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,273 INFO L186 Difference]: Start difference. First operand has 365 places, 1191 transitions, 15431 flow. Second operand 3 states and 868 transitions. [2021-10-15 19:07:57,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1503 transitions, 18790 flow [2021-10-15 19:07:57,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1503 transitions, 18398 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:07:57,396 INFO L242 Difference]: Finished difference. Result has 367 places, 1135 transitions, 15277 flow [2021-10-15 19:07:57,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13822, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15277, PETRI_PLACES=367, PETRI_TRANSITIONS=1135} [2021-10-15 19:07:57,398 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -26 predicate places. [2021-10-15 19:07:57,398 INFO L470 AbstractCegarLoop]: Abstraction has has 367 places, 1135 transitions, 15277 flow [2021-10-15 19:07:57,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:57,399 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:07:57,400 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:07:57,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:07:57,400 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:07:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:07:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1278609055, now seen corresponding path program 1 times [2021-10-15 19:07:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:07:57,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938937877] [2021-10-15 19:07:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:07:57,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:07:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:07:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3345 backedges. 1128 proven. 0 refuted. 0 times theorem prover too weak. 2217 trivial. 0 not checked. [2021-10-15 19:07:58,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:07:58,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938937877] [2021-10-15 19:07:58,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938937877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:07:58,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:07:58,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:07:58,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560370278] [2021-10-15 19:07:58,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:07:58,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:07:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:07:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:07:58,042 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:07:58,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1135 transitions, 15277 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:07:58,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:07:58,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:07:58,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:20,167 INFO L129 PetriNetUnfolder]: 758/20316 cut-off events. [2021-10-15 19:08:20,167 INFO L130 PetriNetUnfolder]: For 29300/29300 co-relation queries the response was YES. [2021-10-15 19:08:20,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46395 conditions, 20316 events. 758/20316 cut-off events. For 29300/29300 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 125014 event pairs, 0 based on Foata normal form. 159/20475 useless extension candidates. Maximal degree in co-relation 35417. Up to 16224 conditions per place. [2021-10-15 19:08:20,234 INFO L132 encePairwiseOnDemand]: 650/723 looper letters, 1172 selfloop transitions, 201 changer transitions 0/1381 dead transitions. [2021-10-15 19:08:20,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1381 transitions, 17161 flow [2021-10-15 19:08:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:08:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:08:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 846 transitions. [2021-10-15 19:08:20,237 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3900414937759336 [2021-10-15 19:08:20,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 846 transitions. [2021-10-15 19:08:20,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 846 transitions. [2021-10-15 19:08:20,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:20,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 846 transitions. [2021-10-15 19:08:20,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:20,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:20,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:20,244 INFO L186 Difference]: Start difference. First operand has 367 places, 1135 transitions, 15277 flow. Second operand 3 states and 846 transitions. [2021-10-15 19:08:20,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1381 transitions, 17161 flow [2021-10-15 19:08:20,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1381 transitions, 16817 flow, removed 44 selfloop flow, removed 2 redundant places. [2021-10-15 19:08:20,362 INFO L242 Difference]: Finished difference. Result has 369 places, 1056 transitions, 14351 flow [2021-10-15 19:08:20,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13145, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=14351, PETRI_PLACES=369, PETRI_TRANSITIONS=1056} [2021-10-15 19:08:20,365 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -24 predicate places. [2021-10-15 19:08:20,365 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 1056 transitions, 14351 flow [2021-10-15 19:08:20,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:20,365 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:08:20,366 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-10-15 19:08:20,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:08:20,367 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:08:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:08:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash -701448478, now seen corresponding path program 1 times [2021-10-15 19:08:20,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:08:20,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506991671] [2021-10-15 19:08:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:08:20,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:08:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:08:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3579 backedges. 1167 proven. 0 refuted. 0 times theorem prover too weak. 2412 trivial. 0 not checked. [2021-10-15 19:08:20,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:08:20,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506991671] [2021-10-15 19:08:20,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506991671] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:08:20,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:08:20,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:08:20,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926038660] [2021-10-15 19:08:20,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:08:20,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:08:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:08:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:08:21,001 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:08:21,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1056 transitions, 14351 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:21,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:08:21,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:08:21,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:08:45,401 INFO L129 PetriNetUnfolder]: 683/22544 cut-off events. [2021-10-15 19:08:45,401 INFO L130 PetriNetUnfolder]: For 33489/33489 co-relation queries the response was YES. [2021-10-15 19:08:45,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50484 conditions, 22544 events. 683/22544 cut-off events. For 33489/33489 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 144458 event pairs, 0 based on Foata normal form. 275/22819 useless extension candidates. Maximal degree in co-relation 39415. Up to 15824 conditions per place. [2021-10-15 19:08:45,456 INFO L132 encePairwiseOnDemand]: 651/723 looper letters, 0 selfloop transitions, 0 changer transitions 1303/1303 dead transitions. [2021-10-15 19:08:45,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1303 transitions, 16069 flow [2021-10-15 19:08:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:08:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:08:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 838 transitions. [2021-10-15 19:08:45,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3863531581373905 [2021-10-15 19:08:45,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 838 transitions. [2021-10-15 19:08:45,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 838 transitions. [2021-10-15 19:08:45,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:08:45,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 838 transitions. [2021-10-15 19:08:45,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:45,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:45,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:45,467 INFO L186 Difference]: Start difference. First operand has 369 places, 1056 transitions, 14351 flow. Second operand 3 states and 838 transitions. [2021-10-15 19:08:45,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1303 transitions, 16069 flow [2021-10-15 19:08:45,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1303 transitions, 15707 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 19:08:45,590 INFO L242 Difference]: Finished difference. Result has 367 places, 0 transitions, 0 flow [2021-10-15 19:08:45,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=11458, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=367, PETRI_TRANSITIONS=0} [2021-10-15 19:08:45,591 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -26 predicate places. [2021-10-15 19:08:45,591 INFO L470 AbstractCegarLoop]: Abstraction has has 367 places, 0 transitions, 0 flow [2021-10-15 19:08:45,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:08:45,593 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:08:45,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:08:45,599 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:08:45,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:08:45 BoogieIcfgContainer [2021-10-15 19:08:45,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:08:45,604 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:08:45,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:08:45,605 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:08:45,605 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:15" (3/4) ... [2021-10-15 19:08:45,608 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:08:45,642 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 19:08:45,645 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:08:45,649 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:08:45,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:08:45,885 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:08:45,886 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:08:45,888 INFO L168 Benchmark]: Toolchain (without parser) took 154488.11 ms. Allocated memory was 92.3 MB in the beginning and 5.1 GB in the end (delta: 5.0 GB). Free memory was 66.0 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.1 GB. [2021-10-15 19:08:45,888 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 67.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:08:45,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1101.55 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 65.8 MB in the beginning and 78.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:45,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 172.65 ms. Allocated memory is still 123.7 MB. Free memory was 78.8 MB in the beginning and 55.4 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:45,890 INFO L168 Benchmark]: Boogie Preprocessor took 175.82 ms. Allocated memory is still 123.7 MB. Free memory was 55.4 MB in the beginning and 69.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:45,891 INFO L168 Benchmark]: RCFGBuilder took 2515.01 ms. Allocated memory was 123.7 MB in the beginning and 197.1 MB in the end (delta: 73.4 MB). Free memory was 69.0 MB in the beginning and 109.8 MB in the end (delta: -40.7 MB). Peak memory consumption was 62.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:45,891 INFO L168 Benchmark]: TraceAbstraction took 150232.01 ms. Allocated memory was 197.1 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 108.7 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.1 GB. [2021-10-15 19:08:45,892 INFO L168 Benchmark]: Witness Printer took 281.50 ms. Allocated memory is still 5.1 GB. Free memory was 3.0 GB in the beginning and 3.0 GB in the end (delta: 36.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:08:45,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 67.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1101.55 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 65.8 MB in the beginning and 78.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 172.65 ms. Allocated memory is still 123.7 MB. Free memory was 78.8 MB in the beginning and 55.4 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 175.82 ms. Allocated memory is still 123.7 MB. Free memory was 55.4 MB in the beginning and 69.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2515.01 ms. Allocated memory was 123.7 MB in the beginning and 197.1 MB in the end (delta: 73.4 MB). Free memory was 69.0 MB in the beginning and 109.8 MB in the end (delta: -40.7 MB). Peak memory consumption was 62.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 150232.01 ms. Allocated memory was 197.1 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 108.7 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.1 GB. * Witness Printer took 281.50 ms. Allocated memory is still 5.1 GB. Free memory was 3.0 GB in the beginning and 3.0 GB in the end (delta: 36.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 116]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 396 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 150162.7ms, OverallIterations: 14, TraceHistogramMax: 9, EmptinessCheckTime: 0.0ms, AutomataDifference: 145056.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 210.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3091 SDtfs, 3682 SDslu, 91 SDs, 0 SdLazy, 13531 SolverSat, 2663 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16027.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15431occurred in iteration=11, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 332.9ms SsaConstructionTime, 828.2ms SatisfiabilityAnalysisTime, 3397.4ms InterpolantComputationTime, 8172 NumberOfCodeBlocks, 8172 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 8158 ConstructedInterpolants, 0 QuantifiedInterpolants, 22868 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 15089/15089 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:08:45,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c13bc388-2ae3-461c-be11-37270696e23f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...