./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX --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 a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:44:31,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:44:31,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:44:31,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:44:31,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:44:31,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:44:31,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:44:31,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:44:31,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:44:31,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:44:31,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:44:31,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:44:31,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:44:31,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:44:31,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:44:31,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:44:31,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:44:31,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:44:31,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:44:31,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:44:31,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:44:31,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:44:31,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:44:31,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:44:31,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:44:31,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:44:31,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:44:31,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:44:31,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:44:31,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:44:31,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:44:31,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:44:31,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:44:31,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:44:31,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:44:31,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:44:31,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:44:31,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:44:31,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:44:31,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:44:31,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:44:31,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:44:31,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:44:31,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:44:31,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:44:31,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:44:31,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:44:31,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:44:31,943 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:44:31,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:44:31,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:44:31,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:44:31,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:44:31,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:44:31,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:44:31,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:44:31,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:44:31,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:44:31,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:44:31,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:44:31,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:44:31,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:44:31,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:44:31,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:44:31,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:31,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:44:31,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:44:31,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:44:31,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:44:31,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:44:31,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:44:31,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:44:31,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:44:31,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:44:31,950 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_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 [2021-11-09 10:44:32,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:44:32,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:44:32,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:44:32,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:44:32,267 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:44:32,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/pthread/fib_safe-10.i [2021-11-09 10:44:32,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/data/916428001/30343d88218a468599f30d0af13ffe5f/FLAG40c1a8ed0 [2021-11-09 10:44:33,010 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:44:33,011 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/sv-benchmarks/c/pthread/fib_safe-10.i [2021-11-09 10:44:33,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/data/916428001/30343d88218a468599f30d0af13ffe5f/FLAG40c1a8ed0 [2021-11-09 10:44:33,329 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/data/916428001/30343d88218a468599f30d0af13ffe5f [2021-11-09 10:44:33,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:44:33,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:44:33,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:33,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:44:33,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:44:33,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:33,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655be8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33, skipping insertion in model container [2021-11-09 10:44:33,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:33,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:44:33,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:44:33,854 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_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/sv-benchmarks/c/pthread/fib_safe-10.i[30815,30828] [2021-11-09 10:44:33,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:33,867 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:44:33,945 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_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/sv-benchmarks/c/pthread/fib_safe-10.i[30815,30828] [2021-11-09 10:44:33,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:33,981 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:44:33,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33 WrapperNode [2021-11-09 10:44:33,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:33,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:33,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:44:33,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:44:33,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:34,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:44:34,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:44:34,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:44:34,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:44:34,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:44:34,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:44:34,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:44:34,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (1/1) ... [2021-11-09 10:44:34,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:34,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:34,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:44:34,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:44:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-09 10:44:34,158 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-09 10:44:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-09 10:44:34,159 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-09 10:44:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:44:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 10:44:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:44:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:44:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:44:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 10:44:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:44:34,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:44:34,168 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 10:44:34,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:44:34,453 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 10:44:34,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:34 BoogieIcfgContainer [2021-11-09 10:44:34,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:44:34,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:44:34,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:44:34,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:44:34,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:33" (1/3) ... [2021-11-09 10:44:34,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cfa2e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:34, skipping insertion in model container [2021-11-09 10:44:34,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:33" (2/3) ... [2021-11-09 10:44:34,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cfa2e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:34, skipping insertion in model container [2021-11-09 10:44:34,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:34" (3/3) ... [2021-11-09 10:44:34,474 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2021-11-09 10:44:34,479 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 10:44:34,480 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:44:34,480 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:44:34,480 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 10:44:34,543 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,543 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,544 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,544 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,544 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,544 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,544 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,545 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,545 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,545 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,546 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,546 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,546 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,547 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,547 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,547 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,548 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,548 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,548 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,548 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,549 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,549 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,549 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,549 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,550 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,550 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,550 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,551 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,551 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,551 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,552 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,552 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,552 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,552 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,553 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,553 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,556 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,556 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,557 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,557 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,557 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,579 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,579 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,579 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,580 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,580 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:34,582 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-09 10:44:34,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:44:34,636 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:44:34,636 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 10:44:34,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 190 flow [2021-11-09 10:44:34,719 INFO L129 PetriNetUnfolder]: 7/88 cut-off events. [2021-11-09 10:44:34,719 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:44:34,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2021-11-09 10:44:34,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 90 transitions, 190 flow [2021-11-09 10:44:34,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 88 transitions, 182 flow [2021-11-09 10:44:34,753 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2021-11-09 10:44:34,753 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:44:34,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:34,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:34,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2010782680, now seen corresponding path program 1 times [2021-11-09 10:44:34,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:34,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129647393] [2021-11-09 10:44:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:34,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:35,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:35,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129647393] [2021-11-09 10:44:35,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129647393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:35,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:35,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:44:35,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433304003] [2021-11-09 10:44:35,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:44:35,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:44:35,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:44:35,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 90 [2021-11-09 10:44:35,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:35,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 90 [2021-11-09 10:44:35,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:35,063 INFO L129 PetriNetUnfolder]: 3/83 cut-off events. [2021-11-09 10:44:35,063 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:44:35,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 3/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 4/83 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2021-11-09 10:44:35,066 INFO L132 encePairwiseOnDemand]: 86/90 looper letters, 0 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2021-11-09 10:44:35,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 172 flow [2021-11-09 10:44:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:44:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 10:44:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2021-11-09 10:44:35,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9666666666666667 [2021-11-09 10:44:35,079 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2021-11-09 10:44:35,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2021-11-09 10:44:35,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:35,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2021-11-09 10:44:35,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,103 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,105 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 182 flow. Second operand 2 states and 174 transitions. [2021-11-09 10:44:35,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 172 flow [2021-11-09 10:44:35,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-09 10:44:35,116 INFO L242 Difference]: Finished difference. Result has 86 places, 83 transitions, 170 flow [2021-11-09 10:44:35,118 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2021-11-09 10:44:35,119 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2021-11-09 10:44:35,119 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 170 flow [2021-11-09 10:44:35,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:35,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:35,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:44:35,120 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash -267972345, now seen corresponding path program 1 times [2021-11-09 10:44:35,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:35,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819738545] [2021-11-09 10:44:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:35,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:35,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:35,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819738545] [2021-11-09 10:44:35,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819738545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:35,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:35,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:44:35,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819905820] [2021-11-09 10:44:35,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:44:35,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:44:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:35,268 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 90 [2021-11-09 10:44:35,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:35,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 90 [2021-11-09 10:44:35,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:35,314 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-11-09 10:44:35,315 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:44:35,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 89 events. 3/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2021-11-09 10:44:35,316 INFO L132 encePairwiseOnDemand]: 87/90 looper letters, 7 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2021-11-09 10:44:35,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 194 flow [2021-11-09 10:44:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:44:35,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-09 10:44:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-11-09 10:44:35,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9148148148148149 [2021-11-09 10:44:35,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-11-09 10:44:35,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-11-09 10:44:35,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:35,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-11-09 10:44:35,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,328 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 170 flow. Second operand 3 states and 247 transitions. [2021-11-09 10:44:35,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 194 flow [2021-11-09 10:44:35,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 10:44:35,336 INFO L242 Difference]: Finished difference. Result has 89 places, 84 transitions, 182 flow [2021-11-09 10:44:35,337 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2021-11-09 10:44:35,337 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2021-11-09 10:44:35,338 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 182 flow [2021-11-09 10:44:35,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:35,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:35,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:44:35,339 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2020520326, now seen corresponding path program 1 times [2021-11-09 10:44:35,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:35,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387288220] [2021-11-09 10:44:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:35,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:35,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:35,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387288220] [2021-11-09 10:44:35,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387288220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:35,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025783187] [2021-11-09 10:44:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:35,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:35,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:35,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:44:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:35,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:44:35,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:35,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025783187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:35,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:35,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-09 10:44:35,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528819207] [2021-11-09 10:44:35,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:44:35,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:44:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:44:35,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:44:35,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:35,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:44:35,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:35,952 INFO L129 PetriNetUnfolder]: 3/96 cut-off events. [2021-11-09 10:44:35,952 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-09 10:44:35,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 96 events. 3/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 121. Up to 7 conditions per place. [2021-11-09 10:44:35,955 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 10 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2021-11-09 10:44:35,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 226 flow [2021-11-09 10:44:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:44:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 10:44:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 478 transitions. [2021-11-09 10:44:35,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8851851851851852 [2021-11-09 10:44:35,960 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 478 transitions. [2021-11-09 10:44:35,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 478 transitions. [2021-11-09 10:44:35,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:35,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 478 transitions. [2021-11-09 10:44:35,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,968 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,969 INFO L186 Difference]: Start difference. First operand has 89 places, 84 transitions, 182 flow. Second operand 6 states and 478 transitions. [2021-11-09 10:44:35,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 226 flow [2021-11-09 10:44:35,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-09 10:44:35,972 INFO L242 Difference]: Finished difference. Result has 96 places, 87 transitions, 212 flow [2021-11-09 10:44:35,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2021-11-09 10:44:35,973 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 8 predicate places. [2021-11-09 10:44:35,973 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 212 flow [2021-11-09 10:44:35,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,974 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:35,975 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-09 10:44:36,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:36,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:36,202 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1122522151, now seen corresponding path program 2 times [2021-11-09 10:44:36,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:36,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399801440] [2021-11-09 10:44:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:36,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:36,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:36,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399801440] [2021-11-09 10:44:36,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399801440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:36,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453773309] [2021-11-09 10:44:36,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:36,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:36,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:36,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:36,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:44:36,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:36,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:36,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:44:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453773309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:36,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:36,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-09 10:44:36,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583738602] [2021-11-09 10:44:36,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:44:36,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:44:36,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:36,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:44:36,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:36,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:44:36,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:36,781 INFO L129 PetriNetUnfolder]: 3/103 cut-off events. [2021-11-09 10:44:36,782 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-09 10:44:36,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 103 events. 3/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 148. Up to 7 conditions per place. [2021-11-09 10:44:36,787 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 11 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2021-11-09 10:44:36,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 274 flow [2021-11-09 10:44:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:44:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-09 10:44:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2021-11-09 10:44:36,791 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8802469135802469 [2021-11-09 10:44:36,791 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2021-11-09 10:44:36,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2021-11-09 10:44:36,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:36,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2021-11-09 10:44:36,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,800 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,800 INFO L186 Difference]: Start difference. First operand has 96 places, 87 transitions, 212 flow. Second operand 9 states and 713 transitions. [2021-11-09 10:44:36,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 274 flow [2021-11-09 10:44:36,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 94 transitions, 268 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-11-09 10:44:36,809 INFO L242 Difference]: Finished difference. Result has 105 places, 90 transitions, 250 flow [2021-11-09 10:44:36,809 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2021-11-09 10:44:36,810 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 17 predicate places. [2021-11-09 10:44:36,810 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 250 flow [2021-11-09 10:44:36,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,812 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:36,812 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:36,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:37,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:37,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1095871078, now seen corresponding path program 3 times [2021-11-09 10:44:37,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:37,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445781630] [2021-11-09 10:44:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:37,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:37,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:37,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445781630] [2021-11-09 10:44:37,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445781630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:37,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239129585] [2021-11-09 10:44:37,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:37,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:37,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:37,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:44:37,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:44:37,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:37,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:44:37,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:37,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239129585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:37,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:37,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 10:44:37,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365882287] [2021-11-09 10:44:37,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:44:37,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:37,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:44:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:44:37,516 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:44:37,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 250 flow. Second operand has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:37,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:44:37,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:37,622 INFO L129 PetriNetUnfolder]: 3/110 cut-off events. [2021-11-09 10:44:37,622 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-11-09 10:44:37,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 110 events. 3/110 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 179. Up to 7 conditions per place. [2021-11-09 10:44:37,624 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 12 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2021-11-09 10:44:37,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 98 transitions, 330 flow [2021-11-09 10:44:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:44:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 10:44:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2021-11-09 10:44:37,628 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8777777777777778 [2021-11-09 10:44:37,628 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 948 transitions. [2021-11-09 10:44:37,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 948 transitions. [2021-11-09 10:44:37,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:37,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 948 transitions. [2021-11-09 10:44:37,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,636 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,636 INFO L186 Difference]: Start difference. First operand has 105 places, 90 transitions, 250 flow. Second operand 12 states and 948 transitions. [2021-11-09 10:44:37,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 98 transitions, 330 flow [2021-11-09 10:44:37,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 98 transitions, 312 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-09 10:44:37,642 INFO L242 Difference]: Finished difference. Result has 114 places, 93 transitions, 288 flow [2021-11-09 10:44:37,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=288, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2021-11-09 10:44:37,643 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 26 predicate places. [2021-11-09 10:44:37,643 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 288 flow [2021-11-09 10:44:37,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,644 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:37,644 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:37,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:37,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:37,858 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash 541433671, now seen corresponding path program 4 times [2021-11-09 10:44:37,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:37,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594693497] [2021-11-09 10:44:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:37,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:38,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:38,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594693497] [2021-11-09 10:44:38,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594693497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:38,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064761126] [2021-11-09 10:44:38,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:38,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:38,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:38,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:38,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:44:38,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:38,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:44:38,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064761126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:39,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:39,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-11-09 10:44:39,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168867589] [2021-11-09 10:44:39,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:44:39,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:39,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:44:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:44:39,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 10:44:39,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 288 flow. Second operand has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:39,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 10:44:39,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:42,017 INFO L129 PetriNetUnfolder]: 685/1417 cut-off events. [2021-11-09 10:44:42,017 INFO L130 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2021-11-09 10:44:42,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 1417 events. 685/1417 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6691 event pairs, 2 based on Foata normal form. 7/1357 useless extension candidates. Maximal degree in co-relation 2878. Up to 342 conditions per place. [2021-11-09 10:44:42,041 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 189 selfloop transitions, 158 changer transitions 11/405 dead transitions. [2021-11-09 10:44:42,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 405 transitions, 1997 flow [2021-11-09 10:44:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 10:44:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-11-09 10:44:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4444 transitions. [2021-11-09 10:44:42,060 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6764079147640791 [2021-11-09 10:44:42,060 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4444 transitions. [2021-11-09 10:44:42,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4444 transitions. [2021-11-09 10:44:42,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:42,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4444 transitions. [2021-11-09 10:44:42,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 60.87671232876713) internal successors, (4444), 73 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,105 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,105 INFO L186 Difference]: Start difference. First operand has 114 places, 93 transitions, 288 flow. Second operand 73 states and 4444 transitions. [2021-11-09 10:44:42,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 405 transitions, 1997 flow [2021-11-09 10:44:42,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 405 transitions, 1883 flow, removed 28 selfloop flow, removed 8 redundant places. [2021-11-09 10:44:42,122 INFO L242 Difference]: Finished difference. Result has 216 places, 260 transitions, 1448 flow [2021-11-09 10:44:42,123 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=1448, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2021-11-09 10:44:42,123 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 128 predicate places. [2021-11-09 10:44:42,124 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 1448 flow [2021-11-09 10:44:42,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,125 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:42,125 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:42,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:42,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 10:44:42,340 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash 645980809, now seen corresponding path program 1 times [2021-11-09 10:44:42,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:42,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435129261] [2021-11-09 10:44:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:42,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:42,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:42,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435129261] [2021-11-09 10:44:42,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435129261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:42,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257826872] [2021-11-09 10:44:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:42,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:42,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:42,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:42,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:44:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:42,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:44:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:42,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257826872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:42,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:42,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-09 10:44:42,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356536519] [2021-11-09 10:44:42,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:44:42,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:44:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:44:42,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:44:42,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 1448 flow. Second operand has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:42,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:44:42,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:43,457 INFO L129 PetriNetUnfolder]: 365/1110 cut-off events. [2021-11-09 10:44:43,458 INFO L130 PetriNetUnfolder]: For 73499/73629 co-relation queries the response was YES. [2021-11-09 10:44:43,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8265 conditions, 1110 events. 365/1110 cut-off events. For 73499/73629 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6089 event pairs, 53 based on Foata normal form. 48/1076 useless extension candidates. Maximal degree in co-relation 8213. Up to 259 conditions per place. [2021-11-09 10:44:43,516 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 14 selfloop transitions, 56 changer transitions 0/270 dead transitions. [2021-11-09 10:44:43,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 270 transitions, 1666 flow [2021-11-09 10:44:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:44:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 10:44:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1418 transitions. [2021-11-09 10:44:43,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8753086419753087 [2021-11-09 10:44:43,572 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1418 transitions. [2021-11-09 10:44:43,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1418 transitions. [2021-11-09 10:44:43,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:43,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1418 transitions. [2021-11-09 10:44:43,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.77777777777777) internal successors, (1418), 18 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,584 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,584 INFO L186 Difference]: Start difference. First operand has 216 places, 260 transitions, 1448 flow. Second operand 18 states and 1418 transitions. [2021-11-09 10:44:43,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 270 transitions, 1666 flow [2021-11-09 10:44:43,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 1507 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-11-09 10:44:43,706 INFO L242 Difference]: Finished difference. Result has 217 places, 263 transitions, 1471 flow [2021-11-09 10:44:43,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1471, PETRI_PLACES=217, PETRI_TRANSITIONS=263} [2021-11-09 10:44:43,707 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 129 predicate places. [2021-11-09 10:44:43,707 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 263 transitions, 1471 flow [2021-11-09 10:44:43,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,708 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:43,710 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:43,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:43,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:43,930 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1305512388, now seen corresponding path program 2 times [2021-11-09 10:44:43,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:43,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467873842] [2021-11-09 10:44:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:43,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:44,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:44,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467873842] [2021-11-09 10:44:44,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467873842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:44,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483709976] [2021-11-09 10:44:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:44,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:44,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:44,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:44:44,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:44,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:44:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:44,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483709976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:44,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:44,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-09 10:44:44,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115009854] [2021-11-09 10:44:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:44:44,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:44:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:44:44,697 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:44:44,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 263 transitions, 1471 flow. Second operand has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:44,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:44,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:44:44,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:45,260 INFO L129 PetriNetUnfolder]: 409/1187 cut-off events. [2021-11-09 10:44:45,260 INFO L130 PetriNetUnfolder]: For 84677/84820 co-relation queries the response was YES. [2021-11-09 10:44:45,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1187 events. 409/1187 cut-off events. For 84677/84820 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6358 event pairs, 65 based on Foata normal form. 69/1165 useless extension candidates. Maximal degree in co-relation 9420. Up to 302 conditions per place. [2021-11-09 10:44:45,317 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 15 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2021-11-09 10:44:45,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 274 transitions, 1707 flow [2021-11-09 10:44:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:44:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 10:44:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1653 transitions. [2021-11-09 10:44:45,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8746031746031746 [2021-11-09 10:44:45,322 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1653 transitions. [2021-11-09 10:44:45,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1653 transitions. [2021-11-09 10:44:45,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:45,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1653 transitions. [2021-11-09 10:44:45,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.71428571428571) internal successors, (1653), 21 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:45,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:45,335 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:45,335 INFO L186 Difference]: Start difference. First operand has 217 places, 263 transitions, 1471 flow. Second operand 21 states and 1653 transitions. [2021-11-09 10:44:45,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 274 transitions, 1707 flow [2021-11-09 10:44:45,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 274 transitions, 1574 flow, removed 19 selfloop flow, removed 13 redundant places. [2021-11-09 10:44:45,453 INFO L242 Difference]: Finished difference. Result has 227 places, 266 transitions, 1526 flow [2021-11-09 10:44:45,454 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1526, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2021-11-09 10:44:45,454 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 139 predicate places. [2021-11-09 10:44:45,454 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 1526 flow [2021-11-09 10:44:45,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:45,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:45,456 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:45,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:45,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:45,670 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1913325353, now seen corresponding path program 3 times [2021-11-09 10:44:45,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:45,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394286661] [2021-11-09 10:44:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:45,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:45,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:45,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394286661] [2021-11-09 10:44:45,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394286661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:45,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333930997] [2021-11-09 10:44:45,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:45,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:45,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:45,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:45,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:44:46,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:44:46,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:44:46,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:46,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333930997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:46,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:46,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-09 10:44:46,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292197614] [2021-11-09 10:44:46,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:44:46,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:46,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:44:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:44:46,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:44:46,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 1526 flow. Second operand has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:46,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:46,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:44:46,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:47,189 INFO L129 PetriNetUnfolder]: 456/1347 cut-off events. [2021-11-09 10:44:47,190 INFO L130 PetriNetUnfolder]: For 101824/101970 co-relation queries the response was YES. [2021-11-09 10:44:47,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11125 conditions, 1347 events. 456/1347 cut-off events. For 101824/101970 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7362 event pairs, 77 based on Foata normal form. 49/1282 useless extension candidates. Maximal degree in co-relation 11066. Up to 358 conditions per place. [2021-11-09 10:44:47,247 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 16 selfloop transitions, 62 changer transitions 0/278 dead transitions. [2021-11-09 10:44:47,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 278 transitions, 1780 flow [2021-11-09 10:44:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:44:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 10:44:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1888 transitions. [2021-11-09 10:44:47,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8740740740740741 [2021-11-09 10:44:47,251 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1888 transitions. [2021-11-09 10:44:47,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1888 transitions. [2021-11-09 10:44:47,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:47,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1888 transitions. [2021-11-09 10:44:47,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.66666666666667) internal successors, (1888), 24 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,310 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,311 INFO L186 Difference]: Start difference. First operand has 227 places, 266 transitions, 1526 flow. Second operand 24 states and 1888 transitions. [2021-11-09 10:44:47,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 278 transitions, 1780 flow [2021-11-09 10:44:47,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 1624 flow, removed 22 selfloop flow, removed 17 redundant places. [2021-11-09 10:44:47,422 INFO L242 Difference]: Finished difference. Result has 236 places, 269 transitions, 1570 flow [2021-11-09 10:44:47,422 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1570, PETRI_PLACES=236, PETRI_TRANSITIONS=269} [2021-11-09 10:44:47,423 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 148 predicate places. [2021-11-09 10:44:47,423 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 269 transitions, 1570 flow [2021-11-09 10:44:47,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,424 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:47,424 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:47,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:47,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 10:44:47,634 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:44:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1779560740, now seen corresponding path program 4 times [2021-11-09 10:44:47,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:47,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883589540] [2021-11-09 10:44:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:47,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:47,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883589540] [2021-11-09 10:44:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883589540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306881355] [2021-11-09 10:44:47,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:47,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:47,852 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:47,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:44:48,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:44:48,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 117 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:50,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306881355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:50,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:50,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 48 [2021-11-09 10:44:50,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120735955] [2021-11-09 10:44:50,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 10:44:50,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 10:44:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:44:50,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 10:44:50,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 269 transitions, 1570 flow. Second operand has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:50,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:44:50,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 10:44:50,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:44:59,144 INFO L129 PetriNetUnfolder]: 1649/3544 cut-off events. [2021-11-09 10:44:59,144 INFO L130 PetriNetUnfolder]: For 310989/311405 co-relation queries the response was YES. [2021-11-09 10:44:59,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31770 conditions, 3544 events. 1649/3544 cut-off events. For 310989/311405 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 21074 event pairs, 0 based on Foata normal form. 176/3528 useless extension candidates. Maximal degree in co-relation 31708. Up to 917 conditions per place. [2021-11-09 10:44:59,247 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 343 selfloop transitions, 541 changer transitions 0/931 dead transitions. [2021-11-09 10:44:59,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 931 transitions, 14911 flow [2021-11-09 10:44:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-09 10:44:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-11-09 10:44:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 11185 transitions. [2021-11-09 10:44:59,270 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6681600955794504 [2021-11-09 10:44:59,270 INFO L72 ComplementDD]: Start complementDD. Operand 186 states and 11185 transitions. [2021-11-09 10:44:59,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 186 states and 11185 transitions. [2021-11-09 10:44:59,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:44:59,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 186 states and 11185 transitions. [2021-11-09 10:44:59,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 187 states, 186 states have (on average 60.134408602150536) internal successors, (11185), 186 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:59,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:59,340 INFO L81 ComplementDD]: Finished complementDD. Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:59,340 INFO L186 Difference]: Start difference. First operand has 236 places, 269 transitions, 1570 flow. Second operand 186 states and 11185 transitions. [2021-11-09 10:44:59,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 931 transitions, 14911 flow [2021-11-09 10:44:59,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 931 transitions, 14417 flow, removed 125 selfloop flow, removed 20 redundant places. [2021-11-09 10:44:59,986 INFO L242 Difference]: Finished difference. Result has 471 places, 689 transitions, 8650 flow [2021-11-09 10:44:59,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=186, PETRI_FLOW=8650, PETRI_PLACES=471, PETRI_TRANSITIONS=689} [2021-11-09 10:44:59,987 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-09 10:44:59,987 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 689 transitions, 8650 flow [2021-11-09 10:44:59,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:59,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:44:59,989 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:00,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:00,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:45:00,218 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:00,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1747839863, now seen corresponding path program 1 times [2021-11-09 10:45:00,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:00,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443996849] [2021-11-09 10:45:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:00,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:00,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:00,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443996849] [2021-11-09 10:45:00,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443996849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:00,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206644731] [2021-11-09 10:45:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:00,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:00,444 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:00,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:45:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:00,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:45:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:01,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206644731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:01,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:01,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-09 10:45:01,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618660664] [2021-11-09 10:45:01,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:45:01,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:45:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:45:01,213 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:01,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 689 transitions, 8650 flow. Second operand has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:01,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:01,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:03,186 INFO L129 PetriNetUnfolder]: 1088/2847 cut-off events. [2021-11-09 10:45:03,186 INFO L130 PetriNetUnfolder]: For 1359521/1359850 co-relation queries the response was YES. [2021-11-09 10:45:03,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49710 conditions, 2847 events. 1088/2847 cut-off events. For 1359521/1359850 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 17808 event pairs, 12 based on Foata normal form. 23/2687 useless extension candidates. Maximal degree in co-relation 49578. Up to 752 conditions per place. [2021-11-09 10:45:03,378 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 18 selfloop transitions, 155 changer transitions 0/703 dead transitions. [2021-11-09 10:45:03,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 703 transitions, 9146 flow [2021-11-09 10:45:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:45:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-09 10:45:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2358 transitions. [2021-11-09 10:45:03,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2021-11-09 10:45:03,387 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2358 transitions. [2021-11-09 10:45:03,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2358 transitions. [2021-11-09 10:45:03,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:03,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2358 transitions. [2021-11-09 10:45:03,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.6) internal successors, (2358), 30 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:03,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:03,401 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:03,401 INFO L186 Difference]: Start difference. First operand has 471 places, 689 transitions, 8650 flow. Second operand 30 states and 2358 transitions. [2021-11-09 10:45:03,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 703 transitions, 9146 flow [2021-11-09 10:45:06,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 703 transitions, 5138 flow, removed 1800 selfloop flow, removed 54 redundant places. [2021-11-09 10:45:06,186 INFO L242 Difference]: Finished difference. Result has 449 places, 692 transitions, 5072 flow [2021-11-09 10:45:06,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5072, PETRI_PLACES=449, PETRI_TRANSITIONS=692} [2021-11-09 10:45:06,188 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 361 predicate places. [2021-11-09 10:45:06,188 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 692 transitions, 5072 flow [2021-11-09 10:45:06,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:06,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:06,189 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:06,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:06,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:45:06,390 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -366798908, now seen corresponding path program 2 times [2021-11-09 10:45:06,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:06,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485357227] [2021-11-09 10:45:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:06,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:06,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:06,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485357227] [2021-11-09 10:45:06,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485357227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:06,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710494429] [2021-11-09 10:45:06,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:06,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:06,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:06,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:06,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:45:07,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:07,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:07,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:45:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:07,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710494429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:07,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:07,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-11-09 10:45:07,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386524496] [2021-11-09 10:45:07,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:45:07,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:45:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:45:07,561 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:07,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 692 transitions, 5072 flow. Second operand has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:07,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:07,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:09,597 INFO L129 PetriNetUnfolder]: 1167/3083 cut-off events. [2021-11-09 10:45:09,597 INFO L130 PetriNetUnfolder]: For 1468851/1469300 co-relation queries the response was YES. [2021-11-09 10:45:09,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50830 conditions, 3083 events. 1167/3083 cut-off events. For 1468851/1469300 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 19336 event pairs, 23 based on Foata normal form. 21/2886 useless extension candidates. Maximal degree in co-relation 50694. Up to 693 conditions per place. [2021-11-09 10:45:10,001 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 19 selfloop transitions, 158 changer transitions 0/707 dead transitions. [2021-11-09 10:45:10,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 707 transitions, 5586 flow [2021-11-09 10:45:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:45:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-09 10:45:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2593 transitions. [2021-11-09 10:45:10,007 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8730639730639731 [2021-11-09 10:45:10,008 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2593 transitions. [2021-11-09 10:45:10,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2593 transitions. [2021-11-09 10:45:10,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:10,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2593 transitions. [2021-11-09 10:45:10,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 78.57575757575758) internal successors, (2593), 33 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,028 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,029 INFO L186 Difference]: Start difference. First operand has 449 places, 692 transitions, 5072 flow. Second operand 33 states and 2593 transitions. [2021-11-09 10:45:10,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 707 transitions, 5586 flow [2021-11-09 10:45:14,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 707 transitions, 5216 flow, removed 40 selfloop flow, removed 25 redundant places. [2021-11-09 10:45:14,153 INFO L242 Difference]: Finished difference. Result has 459 places, 695 transitions, 5136 flow [2021-11-09 10:45:14,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5136, PETRI_PLACES=459, PETRI_TRANSITIONS=695} [2021-11-09 10:45:14,155 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 371 predicate places. [2021-11-09 10:45:14,155 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 695 transitions, 5136 flow [2021-11-09 10:45:14,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:14,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:14,157 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:14,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:14,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:45:14,359 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 522062889, now seen corresponding path program 3 times [2021-11-09 10:45:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:14,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270737496] [2021-11-09 10:45:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:14,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:14,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:14,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270737496] [2021-11-09 10:45:14,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270737496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:14,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369395441] [2021-11-09 10:45:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:14,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:14,709 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:14,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:45:15,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 10:45:15,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 10:45:15,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:15,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369395441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:15,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:15,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-11-09 10:45:15,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316922360] [2021-11-09 10:45:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:45:15,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:45:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:45:15,576 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:15,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 695 transitions, 5136 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:15,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:15,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:15,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:17,371 INFO L129 PetriNetUnfolder]: 1235/3143 cut-off events. [2021-11-09 10:45:17,372 INFO L130 PetriNetUnfolder]: For 1585288/1585819 co-relation queries the response was YES. [2021-11-09 10:45:17,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54782 conditions, 3143 events. 1235/3143 cut-off events. For 1585288/1585819 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 19112 event pairs, 31 based on Foata normal form. 21/2936 useless extension candidates. Maximal degree in co-relation 54643. Up to 750 conditions per place. [2021-11-09 10:45:17,816 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 20 selfloop transitions, 161 changer transitions 0/711 dead transitions. [2021-11-09 10:45:17,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 711 transitions, 5668 flow [2021-11-09 10:45:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:45:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 10:45:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2828 transitions. [2021-11-09 10:45:17,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8728395061728395 [2021-11-09 10:45:17,822 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2828 transitions. [2021-11-09 10:45:17,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2828 transitions. [2021-11-09 10:45:17,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:17,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2828 transitions. [2021-11-09 10:45:17,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.55555555555556) internal successors, (2828), 36 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:17,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:17,834 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:17,834 INFO L186 Difference]: Start difference. First operand has 459 places, 695 transitions, 5136 flow. Second operand 36 states and 2828 transitions. [2021-11-09 10:45:17,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 711 transitions, 5668 flow [2021-11-09 10:45:22,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 711 transitions, 5272 flow, removed 43 selfloop flow, removed 29 redundant places. [2021-11-09 10:45:22,538 INFO L242 Difference]: Finished difference. Result has 468 places, 698 transitions, 5186 flow [2021-11-09 10:45:22,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5186, PETRI_PLACES=468, PETRI_TRANSITIONS=698} [2021-11-09 10:45:22,540 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 380 predicate places. [2021-11-09 10:45:22,540 INFO L470 AbstractCegarLoop]: Abstraction has has 468 places, 698 transitions, 5186 flow [2021-11-09 10:45:22,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:22,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:22,541 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:22,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-09 10:45:22,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:45:22,770 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:22,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1609652580, now seen corresponding path program 4 times [2021-11-09 10:45:22,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:22,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457836347] [2021-11-09 10:45:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:22,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:23,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:23,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457836347] [2021-11-09 10:45:23,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457836347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:23,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574346832] [2021-11-09 10:45:23,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:23,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:23,222 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:23,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:45:23,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:23,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:23,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 10:45:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:27,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574346832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:27,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:27,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 43] total 68 [2021-11-09 10:45:27,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860222235] [2021-11-09 10:45:27,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 10:45:27,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 10:45:27,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4084, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 10:45:27,070 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 10:45:27,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 698 transitions, 5186 flow. Second operand has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:27,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:27,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 10:45:27,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:38,249 INFO L129 PetriNetUnfolder]: 2883/5915 cut-off events. [2021-11-09 10:45:38,250 INFO L130 PetriNetUnfolder]: For 3622519/3623964 co-relation queries the response was YES. [2021-11-09 10:45:38,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116319 conditions, 5915 events. 2883/5915 cut-off events. For 3622519/3623964 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 36225 event pairs, 35 based on Foata normal form. 318/5913 useless extension candidates. Maximal degree in co-relation 116177. Up to 1478 conditions per place. [2021-11-09 10:45:38,519 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 974 selfloop transitions, 555 changer transitions 0/1576 dead transitions. [2021-11-09 10:45:38,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1576 transitions, 47809 flow [2021-11-09 10:45:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-11-09 10:45:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-11-09 10:45:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 11750 transitions. [2021-11-09 10:45:38,539 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6695156695156695 [2021-11-09 10:45:38,539 INFO L72 ComplementDD]: Start complementDD. Operand 195 states and 11750 transitions. [2021-11-09 10:45:38,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 195 states and 11750 transitions. [2021-11-09 10:45:38,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:38,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 195 states and 11750 transitions. [2021-11-09 10:45:38,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 196 states, 195 states have (on average 60.256410256410255) internal successors, (11750), 195 states have internal predecessors, (11750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,597 INFO L81 ComplementDD]: Finished complementDD. Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,598 INFO L186 Difference]: Start difference. First operand has 468 places, 698 transitions, 5186 flow. Second operand 195 states and 11750 transitions. [2021-11-09 10:45:38,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1576 transitions, 47809 flow [2021-11-09 10:45:46,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1576 transitions, 46939 flow, removed 184 selfloop flow, removed 32 redundant places. [2021-11-09 10:45:46,482 INFO L242 Difference]: Finished difference. Result has 735 places, 1118 transitions, 22687 flow [2021-11-09 10:45:46,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=195, PETRI_FLOW=22687, PETRI_PLACES=735, PETRI_TRANSITIONS=1118} [2021-11-09 10:45:46,484 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 647 predicate places. [2021-11-09 10:45:46,485 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 1118 transitions, 22687 flow [2021-11-09 10:45:46,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:46,486 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:46,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:46,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:46,702 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash -254102967, now seen corresponding path program 5 times [2021-11-09 10:45:46,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:46,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577258687] [2021-11-09 10:45:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:46,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:47,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:47,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577258687] [2021-11-09 10:45:47,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577258687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:47,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871455292] [2021-11-09 10:45:47,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:47,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:47,140 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:47,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:45:48,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-09 10:45:48,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:45:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871455292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:48,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:48,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-11-09 10:45:48,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489980157] [2021-11-09 10:45:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:45:48,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:45:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:45:48,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:48,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1118 transitions, 22687 flow. Second operand has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:48,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:48,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:48,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:53,754 INFO L129 PetriNetUnfolder]: 1888/4851 cut-off events. [2021-11-09 10:45:53,754 INFO L130 PetriNetUnfolder]: For 9193484/9194975 co-relation queries the response was YES. [2021-11-09 10:45:54,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158458 conditions, 4851 events. 1888/4851 cut-off events. For 9193484/9194975 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 32450 event pairs, 56 based on Foata normal form. 25/4489 useless extension candidates. Maximal degree in co-relation 158211. Up to 1252 conditions per place. [2021-11-09 10:45:54,453 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 22 selfloop transitions, 278 changer transitions 0/1136 dead transitions. [2021-11-09 10:45:54,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 1136 transitions, 23501 flow [2021-11-09 10:45:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:45:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-09 10:45:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3298 transitions. [2021-11-09 10:45:54,458 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8724867724867725 [2021-11-09 10:45:54,458 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3298 transitions. [2021-11-09 10:45:54,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3298 transitions. [2021-11-09 10:45:54,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:54,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3298 transitions. [2021-11-09 10:45:54,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 78.52380952380952) internal successors, (3298), 42 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:54,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:54,473 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:54,474 INFO L186 Difference]: Start difference. First operand has 735 places, 1118 transitions, 22687 flow. Second operand 42 states and 3298 transitions. [2021-11-09 10:45:54,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 1136 transitions, 23501 flow [2021-11-09 10:46:41,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 1136 transitions, 9151 flow, removed 7128 selfloop flow, removed 11 redundant places. [2021-11-09 10:46:41,330 INFO L242 Difference]: Finished difference. Result has 768 places, 1121 transitions, 9053 flow [2021-11-09 10:46:41,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=9053, PETRI_PLACES=768, PETRI_TRANSITIONS=1121} [2021-11-09 10:46:41,331 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 680 predicate places. [2021-11-09 10:46:41,332 INFO L470 AbstractCegarLoop]: Abstraction has has 768 places, 1121 transitions, 9053 flow [2021-11-09 10:46:41,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:41,332 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:46:41,332 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:41,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:41,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 10:46:41,533 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:46:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash 337783618, now seen corresponding path program 6 times [2021-11-09 10:46:41,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:41,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325440850] [2021-11-09 10:46:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:41,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:41,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:41,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325440850] [2021-11-09 10:46:41,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325440850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683706694] [2021-11-09 10:46:41,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:46:41,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:41,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:41,937 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:41,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:46:42,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 10:46:42,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:42,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:46:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:43,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683706694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:43,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:43,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-11-09 10:46:43,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592811575] [2021-11-09 10:46:43,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:46:43,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:43,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:46:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:46:43,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:46:43,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1121 transitions, 9053 flow. Second operand has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:43,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:46:43,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:46:43,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:46:48,474 INFO L129 PetriNetUnfolder]: 1975/4877 cut-off events. [2021-11-09 10:46:48,474 INFO L130 PetriNetUnfolder]: For 9332136/9333284 co-relation queries the response was YES. [2021-11-09 10:46:48,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159480 conditions, 4877 events. 1975/4877 cut-off events. For 9332136/9333284 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 31634 event pairs, 69 based on Foata normal form. 25/4507 useless extension candidates. Maximal degree in co-relation 159229. Up to 1230 conditions per place. [2021-11-09 10:46:49,102 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 23 selfloop transitions, 281 changer transitions 0/1140 dead transitions. [2021-11-09 10:46:49,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1140 transitions, 9885 flow [2021-11-09 10:46:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:46:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-09 10:46:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3533 transitions. [2021-11-09 10:46:49,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8723456790123457 [2021-11-09 10:46:49,106 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3533 transitions. [2021-11-09 10:46:49,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3533 transitions. [2021-11-09 10:46:49,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:46:49,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3533 transitions. [2021-11-09 10:46:49,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 78.5111111111111) internal successors, (3533), 45 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:49,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:49,116 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:49,117 INFO L186 Difference]: Start difference. First operand has 768 places, 1121 transitions, 9053 flow. Second operand 45 states and 3533 transitions. [2021-11-09 10:46:49,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1140 transitions, 9885 flow [2021-11-09 10:47:27,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1140 transitions, 9230 flow, removed 58 selfloop flow, removed 37 redundant places. [2021-11-09 10:47:27,548 INFO L242 Difference]: Finished difference. Result has 778 places, 1124 transitions, 9120 flow [2021-11-09 10:47:27,549 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9120, PETRI_PLACES=778, PETRI_TRANSITIONS=1124} [2021-11-09 10:47:27,549 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 690 predicate places. [2021-11-09 10:47:27,550 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 1124 transitions, 9120 flow [2021-11-09 10:47:27,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:27,550 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:47:27,550 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:27,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:27,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:27,751 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:47:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash -377637117, now seen corresponding path program 7 times [2021-11-09 10:47:27,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:27,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76672542] [2021-11-09 10:47:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:27,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:28,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:28,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76672542] [2021-11-09 10:47:28,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76672542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:28,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524868427] [2021-11-09 10:47:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:47:28,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:28,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:28,168 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:28,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:47:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 10:47:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:29,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524868427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:29,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:29,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-11-09 10:47:29,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342961235] [2021-11-09 10:47:29,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:47:29,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:29,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:47:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:47:29,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:47:29,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1124 transitions, 9120 flow. Second operand has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:29,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:47:29,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:47:29,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:47:33,296 INFO L129 PetriNetUnfolder]: 2093/5286 cut-off events. [2021-11-09 10:47:33,296 INFO L130 PetriNetUnfolder]: For 10278664/10280237 co-relation queries the response was YES. [2021-11-09 10:47:33,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173916 conditions, 5286 events. 2093/5286 cut-off events. For 10278664/10280237 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 34839 event pairs, 82 based on Foata normal form. 25/4855 useless extension candidates. Maximal degree in co-relation 173662. Up to 1348 conditions per place. [2021-11-09 10:47:33,923 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 24 selfloop transitions, 284 changer transitions 0/1144 dead transitions. [2021-11-09 10:47:33,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 1144 transitions, 9970 flow [2021-11-09 10:47:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 10:47:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-09 10:47:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3768 transitions. [2021-11-09 10:47:33,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8722222222222222 [2021-11-09 10:47:33,927 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3768 transitions. [2021-11-09 10:47:33,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3768 transitions. [2021-11-09 10:47:33,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:47:33,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3768 transitions. [2021-11-09 10:47:33,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 78.5) internal successors, (3768), 48 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:33,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:33,944 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:33,944 INFO L186 Difference]: Start difference. First operand has 778 places, 1124 transitions, 9120 flow. Second operand 48 states and 3768 transitions. [2021-11-09 10:47:33,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 1144 transitions, 9970 flow [2021-11-09 10:48:41,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1144 transitions, 9292 flow, removed 61 selfloop flow, removed 41 redundant places. [2021-11-09 10:48:41,786 INFO L242 Difference]: Finished difference. Result has 787 places, 1127 transitions, 9176 flow [2021-11-09 10:48:41,788 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=9176, PETRI_PLACES=787, PETRI_TRANSITIONS=1127} [2021-11-09 10:48:41,789 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 699 predicate places. [2021-11-09 10:48:41,789 INFO L470 AbstractCegarLoop]: Abstraction has has 787 places, 1127 transitions, 9176 flow [2021-11-09 10:48:41,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:41,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:48:41,790 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:41,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:42,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:48:42,006 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:48:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1909233674, now seen corresponding path program 8 times [2021-11-09 10:48:42,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:42,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868388918] [2021-11-09 10:48:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:42,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:42,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:42,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868388918] [2021-11-09 10:48:42,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868388918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:42,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171189771] [2021-11-09 10:48:42,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:48:42,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:42,550 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:42,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:48:43,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:48:43,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:48:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:43,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171189771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:43,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:43,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-11-09 10:48:43,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834207364] [2021-11-09 10:48:43,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:48:43,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:48:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:48:43,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:48:43,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1127 transitions, 9176 flow. Second operand has 37 states, 37 states have (on average 78.94594594594595) internal successors, (2921), 37 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:43,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:48:43,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:48:43,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:48:48,749 INFO L129 PetriNetUnfolder]: 2182/5532 cut-off events. [2021-11-09 10:48:48,749 INFO L130 PetriNetUnfolder]: For 10966108/10968120 co-relation queries the response was YES. [2021-11-09 10:48:49,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183543 conditions, 5532 events. 2182/5532 cut-off events. For 10966108/10968120 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 36494 event pairs, 95 based on Foata normal form. 25/5069 useless extension candidates. Maximal degree in co-relation 183286. Up to 1437 conditions per place. [2021-11-09 10:48:50,141 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 25 selfloop transitions, 287 changer transitions 0/1148 dead transitions. [2021-11-09 10:48:50,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 837 places, 1148 transitions, 10044 flow [2021-11-09 10:48:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 10:48:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-09 10:48:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4003 transitions. [2021-11-09 10:48:50,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8721132897603486 [2021-11-09 10:48:50,145 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4003 transitions. [2021-11-09 10:48:50,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4003 transitions. [2021-11-09 10:48:50,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:48:50,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4003 transitions. [2021-11-09 10:48:50,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 78.49019607843137) internal successors, (4003), 51 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 90.0) internal successors, (4680), 52 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,159 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 90.0) internal successors, (4680), 52 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,159 INFO L186 Difference]: Start difference. First operand has 787 places, 1127 transitions, 9176 flow. Second operand 51 states and 4003 transitions. [2021-11-09 10:48:50,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 837 places, 1148 transitions, 10044 flow [2021-11-09 10:49:57,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 1148 transitions, 9354 flow, removed 64 selfloop flow, removed 44 redundant places. [2021-11-09 10:49:57,748 INFO L242 Difference]: Finished difference. Result has 796 places, 1130 transitions, 9232 flow [2021-11-09 10:49:57,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8486, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9232, PETRI_PLACES=796, PETRI_TRANSITIONS=1130} [2021-11-09 10:49:57,749 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 708 predicate places. [2021-11-09 10:49:57,750 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 1130 transitions, 9232 flow [2021-11-09 10:49:57,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.94594594594595) internal successors, (2921), 37 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:57,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:49:57,751 INFO L254 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:57,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:57,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:49:57,962 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:49:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1431752995, now seen corresponding path program 9 times [2021-11-09 10:49:57,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:57,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364767749] [2021-11-09 10:49:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:57,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:58,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:58,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364767749] [2021-11-09 10:49:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364767749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:58,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147801645] [2021-11-09 10:49:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:49:58,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:58,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:58,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:49:59,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-09 10:49:59,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:49:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:59,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147801645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:59,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:59,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-11-09 10:49:59,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048751498] [2021-11-09 10:49:59,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:49:59,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:49:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:49:59,936 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:49:59,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 1130 transitions, 9232 flow. Second operand has 39 states, 39 states have (on average 78.94871794871794) internal successors, (3079), 39 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:59,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:49:59,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:49:59,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:50:06,318 INFO L129 PetriNetUnfolder]: 2293/5847 cut-off events. [2021-11-09 10:50:06,318 INFO L130 PetriNetUnfolder]: For 11801646/11803916 co-relation queries the response was YES. [2021-11-09 10:50:06,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196757 conditions, 5847 events. 2293/5847 cut-off events. For 11801646/11803916 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 38735 event pairs, 108 based on Foata normal form. 24/5337 useless extension candidates. Maximal degree in co-relation 196497. Up to 1548 conditions per place. [2021-11-09 10:50:07,091 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 26 selfloop transitions, 290 changer transitions 0/1152 dead transitions. [2021-11-09 10:50:07,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 1152 transitions, 10118 flow [2021-11-09 10:50:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 10:50:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-09 10:50:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4238 transitions. [2021-11-09 10:50:07,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8720164609053498 [2021-11-09 10:50:07,098 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4238 transitions. [2021-11-09 10:50:07,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4238 transitions. [2021-11-09 10:50:07,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:50:07,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4238 transitions. [2021-11-09 10:50:07,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 78.48148148148148) internal successors, (4238), 54 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:07,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 90.0) internal successors, (4950), 55 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:07,112 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 90.0) internal successors, (4950), 55 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:07,112 INFO L186 Difference]: Start difference. First operand has 796 places, 1130 transitions, 9232 flow. Second operand 54 states and 4238 transitions. [2021-11-09 10:50:07,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 1152 transitions, 10118 flow [2021-11-09 10:51:26,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1152 transitions, 9416 flow, removed 67 selfloop flow, removed 47 redundant places. [2021-11-09 10:51:26,589 INFO L242 Difference]: Finished difference. Result has 805 places, 1133 transitions, 9288 flow [2021-11-09 10:51:26,590 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8530, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=9288, PETRI_PLACES=805, PETRI_TRANSITIONS=1133} [2021-11-09 10:51:26,590 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 717 predicate places. [2021-11-09 10:51:26,591 INFO L470 AbstractCegarLoop]: Abstraction has has 805 places, 1133 transitions, 9288 flow [2021-11-09 10:51:26,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.94871794871794) internal successors, (3079), 39 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:26,591 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:51:26,591 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:26,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:26,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:26,792 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:51:26,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:26,793 INFO L85 PathProgramCache]: Analyzing trace with hash 8348418, now seen corresponding path program 10 times [2021-11-09 10:51:26,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:26,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60485842] [2021-11-09 10:51:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:26,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:27,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:27,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60485842] [2021-11-09 10:51:27,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60485842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:27,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772192176] [2021-11-09 10:51:27,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:51:27,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:27,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:27,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:27,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae11029-7efb-4ce5-b779-50a1ad2e94e1/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:51:28,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:51:28,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:51:28,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 840 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:33,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772192176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:33,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 61] total 98 [2021-11-09 10:51:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341908006] [2021-11-09 10:51:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-09 10:51:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-09 10:51:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=8557, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 10:51:33,613 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 10:51:33,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 1133 transitions, 9288 flow. Second operand has 98 states, 98 states have (on average 58.95918367346939) internal successors, (5778), 98 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:33,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:51:33,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 10:51:33,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:53:25,317 INFO L129 PetriNetUnfolder]: 8197/14831 cut-off events. [2021-11-09 10:53:25,317 INFO L130 PetriNetUnfolder]: For 42068689/42072965 co-relation queries the response was YES. [2021-11-09 10:53:26,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645169 conditions, 14831 events. 8197/14831 cut-off events. For 42068689/42072965 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 88368 event pairs, 30 based on Foata normal form. 591/14957 useless extension candidates. Maximal degree in co-relation 644906. Up to 4634 conditions per place. [2021-11-09 10:53:27,554 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 2080 selfloop transitions, 4039 changer transitions 0/6166 dead transitions. [2021-11-09 10:53:27,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1991 places, 6166 transitions, 451221 flow [2021-11-09 10:53:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1187 states. [2021-11-09 10:53:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1187 states. [2021-11-09 10:53:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 71109 transitions. [2021-11-09 10:53:27,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6656276326874474 [2021-11-09 10:53:27,657 INFO L72 ComplementDD]: Start complementDD. Operand 1187 states and 71109 transitions. [2021-11-09 10:53:27,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1187 states and 71109 transitions. [2021-11-09 10:53:27,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:53:27,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 1187 states and 71109 transitions. [2021-11-09 10:53:27,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 1188 states, 1187 states have (on average 59.90648694187026) internal successors, (71109), 1187 states have internal predecessors, (71109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:27,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 1188 states, 1188 states have (on average 90.0) internal successors, (106920), 1188 states have internal predecessors, (106920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:27,939 INFO L81 ComplementDD]: Finished complementDD. Result has 1188 states, 1188 states have (on average 90.0) internal successors, (106920), 1188 states have internal predecessors, (106920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:27,939 INFO L186 Difference]: Start difference. First operand has 805 places, 1133 transitions, 9288 flow. Second operand 1187 states and 71109 transitions. [2021-11-09 10:53:27,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1991 places, 6166 transitions, 451221 flow