./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --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_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/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_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/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_3f609147-843e-4f01-a020-1bbf8beb7a30/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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:09:02,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:09:02,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:09:02,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:09:02,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:09:02,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:09:02,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:09:02,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:09:02,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:09:02,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:09:02,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:09:02,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:09:02,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:09:02,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:09:02,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:09:02,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:09:02,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:09:02,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:09:02,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:09:02,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:09:02,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:09:02,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:09:02,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:09:02,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:09:02,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:09:02,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:09:02,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:09:02,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:09:02,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:09:02,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:09:02,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:09:02,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:09:02,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:09:02,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:09:02,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:09:02,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:09:02,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:09:02,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:09:02,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:09:02,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:09:02,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:09:02,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:09:02,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:09:02,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:09:02,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:09:02,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:09:02,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:09:02,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:09:02,273 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:09:02,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:09:02,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:09:02,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:09:02,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:09:02,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:09:02,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:09:02,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:09:02,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:09:02,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:09:02,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:09:02,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:09:02,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:09:02,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:09:02,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:09:02,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:09:02,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:09:02,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:09:02,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:09:02,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:09:02,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:09:02,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:09:02,279 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:09:02,280 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:09:02,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:09:02,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:09:02,281 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_3f609147-843e-4f01-a020-1bbf8beb7a30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2021-11-09 09:09:02,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:09:02,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:09:02,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:09:02,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:09:02,590 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:09:02,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-11-09 09:09:02,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/data/ff1184f3a/b2c1cd10e8c3421bae963602574af402/FLAG737e915cb [2021-11-09 09:09:03,229 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:09:03,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-11-09 09:09:03,244 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/data/ff1184f3a/b2c1cd10e8c3421bae963602574af402/FLAG737e915cb [2021-11-09 09:09:03,567 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/data/ff1184f3a/b2c1cd10e8c3421bae963602574af402 [2021-11-09 09:09:03,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:09:03,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:09:03,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:09:03,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:09:03,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:09:03,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2784ed6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03, skipping insertion in model container [2021-11-09 09:09:03,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:09:03,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:09:03,823 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_3f609147-843e-4f01-a020-1bbf8beb7a30/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-11-09 09:09:03,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:09:03,835 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:09:03,855 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_3f609147-843e-4f01-a020-1bbf8beb7a30/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-11-09 09:09:03,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:09:03,871 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:09:03,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03 WrapperNode [2021-11-09 09:09:03,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:09:03,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:09:03,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:09:03,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:09:03,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:09:03,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:09:03,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:09:03,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:09:03,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:09:03,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:09:03,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:09:03,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:09:03,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (1/1) ... [2021-11-09 09:09:03,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:09:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:04,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:09:04,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:09:04,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-09 09:09:04,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-09 09:09:04,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-09 09:09:04,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-09 09:09:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:09:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:09:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:09:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 09:09:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 09:09:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:09:04,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:09:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:09:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:09:04,067 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 09:09:04,440 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:09:04,440 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-09 09:09:04,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:09:04 BoogieIcfgContainer [2021-11-09 09:09:04,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:09:04,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:09:04,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:09:04,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:09:04,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:09:03" (1/3) ... [2021-11-09 09:09:04,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4337c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:09:04, skipping insertion in model container [2021-11-09 09:09:04,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:09:03" (2/3) ... [2021-11-09 09:09:04,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4337c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:09:04, skipping insertion in model container [2021-11-09 09:09:04,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:09:04" (3/3) ... [2021-11-09 09:09:04,455 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2021-11-09 09:09:04,465 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 09:09:04,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:09:04,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:09:04,466 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 09:09:04,513 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,513 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,514 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,514 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,515 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,515 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,516 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,516 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,516 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,517 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,517 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,517 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,518 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,518 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,519 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,520 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,520 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,520 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,521 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,521 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,522 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,522 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,522 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,523 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,524 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,524 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,524 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,525 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,525 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,526 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,526 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,527 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,527 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,527 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,531 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,531 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,532 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,535 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,536 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,536 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,536 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:09:04,544 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-09 09:09:04,595 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:09:04,602 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 09:09:04,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 09:09:04,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 78 transitions, 172 flow [2021-11-09 09:09:04,662 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2021-11-09 09:09:04,663 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 09:09:04,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2021-11-09 09:09:04,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 78 transitions, 172 flow [2021-11-09 09:09:04,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 68 transitions, 148 flow [2021-11-09 09:09:04,697 INFO L129 PetriNetUnfolder]: 6/67 cut-off events. [2021-11-09 09:09:04,697 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 09:09:04,698 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:04,698 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 09:09:04,699 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:04,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:04,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1076961051, now seen corresponding path program 1 times [2021-11-09 09:09:04,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:04,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214402162] [2021-11-09 09:09:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:04,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:04,999 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 09:09:04,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:05,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214402162] [2021-11-09 09:09:05,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214402162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:05,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:05,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:09:05,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778766052] [2021-11-09 09:09:05,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:09:05,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:09:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:09:05,038 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 78 [2021-11-09 09:09:05,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 09:09:05,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:05,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 78 [2021-11-09 09:09:05,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:05,080 INFO L129 PetriNetUnfolder]: 2/64 cut-off events. [2021-11-09 09:09:05,081 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 09:09:05,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 64 events. 2/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 4/64 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2021-11-09 09:09:05,083 INFO L132 encePairwiseOnDemand]: 74/78 looper letters, 0 selfloop transitions, 0 changer transitions 2/64 dead transitions. [2021-11-09 09:09:05,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 140 flow [2021-11-09 09:09:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:09:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 09:09:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 150 transitions. [2021-11-09 09:09:05,096 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9615384615384616 [2021-11-09 09:09:05,097 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 150 transitions. [2021-11-09 09:09:05,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 150 transitions. [2021-11-09 09:09:05,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:05,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 150 transitions. [2021-11-09 09:09:05,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:05,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 09:09:05,113 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 09:09:05,115 INFO L186 Difference]: Start difference. First operand has 69 places, 68 transitions, 148 flow. Second operand 2 states and 150 transitions. [2021-11-09 09:09:05,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 140 flow [2021-11-09 09:09:05,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 09:09:05,130 INFO L242 Difference]: Finished difference. Result has 66 places, 62 transitions, 128 flow [2021-11-09 09:09:05,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2021-11-09 09:09:05,133 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2021-11-09 09:09:05,133 INFO L470 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 128 flow [2021-11-09 09:09:05,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 09:09:05,134 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:05,134 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 09:09:05,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:09:05,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:05,136 INFO L85 PathProgramCache]: Analyzing trace with hash 536234555, now seen corresponding path program 1 times [2021-11-09 09:09:05,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:05,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453901485] [2021-11-09 09:09:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:05,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:05,400 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 09:09:05,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:05,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453901485] [2021-11-09 09:09:05,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453901485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:05,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:05,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:09:05,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972049623] [2021-11-09 09:09:05,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:09:05,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:09:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:09:05,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 78 [2021-11-09 09:09:05,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 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 09:09:05,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:05,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 78 [2021-11-09 09:09:05,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:05,578 INFO L129 PetriNetUnfolder]: 32/129 cut-off events. [2021-11-09 09:09:05,578 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:09:05,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 129 events. 32/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 338 event pairs, 4 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 198. Up to 39 conditions per place. [2021-11-09 09:09:05,583 INFO L132 encePairwiseOnDemand]: 72/78 looper letters, 20 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2021-11-09 09:09:05,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 188 flow [2021-11-09 09:09:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:09:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 09:09:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 332 transitions. [2021-11-09 09:09:05,592 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7094017094017094 [2021-11-09 09:09:05,592 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 332 transitions. [2021-11-09 09:09:05,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 332 transitions. [2021-11-09 09:09:05,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:05,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 332 transitions. [2021-11-09 09:09:05,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 0 states have call successors, (0), 0 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 09:09:05,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 09:09:05,602 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 09:09:05,602 INFO L186 Difference]: Start difference. First operand has 66 places, 62 transitions, 128 flow. Second operand 6 states and 332 transitions. [2021-11-09 09:09:05,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 188 flow [2021-11-09 09:09:05,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 09:09:05,607 INFO L242 Difference]: Finished difference. Result has 70 places, 63 transitions, 146 flow [2021-11-09 09:09:05,607 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2021-11-09 09:09:05,608 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2021-11-09 09:09:05,608 INFO L470 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 146 flow [2021-11-09 09:09:05,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 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 09:09:05,609 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:05,609 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, 1, 1, 1, 1, 1] [2021-11-09 09:09:05,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:09:05,609 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash 458914843, now seen corresponding path program 1 times [2021-11-09 09:09:05,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:05,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90200746] [2021-11-09 09:09:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:05,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:09:05,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:05,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90200746] [2021-11-09 09:09:05,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90200746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:09:05,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:09:05,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:09:05,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700202238] [2021-11-09 09:09:05,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:09:05,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:05,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:09:05,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:09:05,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 78 [2021-11-09 09:09:05,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:05,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:05,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 78 [2021-11-09 09:09:05,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:05,913 INFO L129 PetriNetUnfolder]: 24/122 cut-off events. [2021-11-09 09:09:05,913 INFO L130 PetriNetUnfolder]: For 9/15 co-relation queries the response was YES. [2021-11-09 09:09:05,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 122 events. 24/122 cut-off events. For 9/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 325 event pairs, 12 based on Foata normal form. 6/119 useless extension candidates. Maximal degree in co-relation 205. Up to 40 conditions per place. [2021-11-09 09:09:05,915 INFO L132 encePairwiseOnDemand]: 72/78 looper letters, 18 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2021-11-09 09:09:05,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 202 flow [2021-11-09 09:09:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:09:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 09:09:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 336 transitions. [2021-11-09 09:09:05,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.717948717948718 [2021-11-09 09:09:05,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 336 transitions. [2021-11-09 09:09:05,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 336 transitions. [2021-11-09 09:09:05,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:05,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 336 transitions. [2021-11-09 09:09:05,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 09:09:05,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 09:09:05,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 09:09:05,922 INFO L186 Difference]: Start difference. First operand has 70 places, 63 transitions, 146 flow. Second operand 6 states and 336 transitions. [2021-11-09 09:09:05,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 202 flow [2021-11-09 09:09:05,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 67 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 09:09:05,926 INFO L242 Difference]: Finished difference. Result has 72 places, 64 transitions, 156 flow [2021-11-09 09:09:05,926 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2021-11-09 09:09:05,926 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2021-11-09 09:09:05,926 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 156 flow [2021-11-09 09:09:05,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:09:05,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:05,927 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:05,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:09:05,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash 279455737, now seen corresponding path program 1 times [2021-11-09 09:09:05,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:05,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766269607] [2021-11-09 09:09:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:05,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:06,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:06,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766269607] [2021-11-09 09:09:06,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766269607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:06,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038787506] [2021-11-09 09:09:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:06,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:06,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:06,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:09:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038787506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:07,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:07,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:07,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059505663] [2021-11-09 09:09:07,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:07,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:07,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:07,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:07,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 156 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:07,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:07,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:07,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:08,059 INFO L129 PetriNetUnfolder]: 124/396 cut-off events. [2021-11-09 09:09:08,059 INFO L130 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2021-11-09 09:09:08,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 396 events. 124/396 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1799 event pairs, 15 based on Foata normal form. 1/397 useless extension candidates. Maximal degree in co-relation 823. Up to 101 conditions per place. [2021-11-09 09:09:08,065 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 74 selfloop transitions, 21 changer transitions 10/141 dead transitions. [2021-11-09 09:09:08,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 141 transitions, 621 flow [2021-11-09 09:09:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:09:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:09:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 817 transitions. [2021-11-09 09:09:08,074 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6546474358974359 [2021-11-09 09:09:08,075 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 817 transitions. [2021-11-09 09:09:08,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 817 transitions. [2021-11-09 09:09:08,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:08,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 817 transitions. [2021-11-09 09:09:08,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 51.0625) internal successors, (817), 16 states have internal predecessors, (817), 0 states have call successors, (0), 0 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 09:09:08,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:08,085 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:08,085 INFO L186 Difference]: Start difference. First operand has 72 places, 64 transitions, 156 flow. Second operand 16 states and 817 transitions. [2021-11-09 09:09:08,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 141 transitions, 621 flow [2021-11-09 09:09:08,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 141 transitions, 596 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 09:09:08,095 INFO L242 Difference]: Finished difference. Result has 93 places, 88 transitions, 330 flow [2021-11-09 09:09:08,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=330, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2021-11-09 09:09:08,096 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 24 predicate places. [2021-11-09 09:09:08,098 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 330 flow [2021-11-09 09:09:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:08,099 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:08,100 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:08,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:08,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:08,327 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:08,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1234540035, now seen corresponding path program 2 times [2021-11-09 09:09:08,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:08,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145884525] [2021-11-09 09:09:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:08,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:08,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:08,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145884525] [2021-11-09 09:09:08,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145884525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:08,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804082366] [2021-11-09 09:09:08,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:09:08,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:08,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:08,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:09:08,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:09:08,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:08,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:09:08,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:09,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804082366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:09,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:09,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-11-09 09:09:09,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752845364] [2021-11-09 09:09:09,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:09:09,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:09:09,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:09:09,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:09,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 330 flow. Second operand has 26 states, 26 states have (on average 46.69230769230769) internal successors, (1214), 26 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 09:09:09,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:09,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:09,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:10,848 INFO L129 PetriNetUnfolder]: 135/434 cut-off events. [2021-11-09 09:09:10,849 INFO L130 PetriNetUnfolder]: For 293/293 co-relation queries the response was YES. [2021-11-09 09:09:10,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 434 events. 135/434 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2041 event pairs, 32 based on Foata normal form. 1/434 useless extension candidates. Maximal degree in co-relation 1191. Up to 103 conditions per place. [2021-11-09 09:09:10,855 INFO L132 encePairwiseOnDemand]: 62/78 looper letters, 74 selfloop transitions, 34 changer transitions 9/153 dead transitions. [2021-11-09 09:09:10,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 153 transitions, 875 flow [2021-11-09 09:09:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:09:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:09:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1097 transitions. [2021-11-09 09:09:10,860 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392773892773893 [2021-11-09 09:09:10,861 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1097 transitions. [2021-11-09 09:09:10,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1097 transitions. [2021-11-09 09:09:10,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:10,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1097 transitions. [2021-11-09 09:09:10,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.86363636363637) internal successors, (1097), 22 states have internal predecessors, (1097), 0 states have call successors, (0), 0 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 09:09:10,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:09:10,871 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:09:10,871 INFO L186 Difference]: Start difference. First operand has 93 places, 88 transitions, 330 flow. Second operand 22 states and 1097 transitions. [2021-11-09 09:09:10,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 153 transitions, 875 flow [2021-11-09 09:09:10,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 153 transitions, 795 flow, removed 38 selfloop flow, removed 6 redundant places. [2021-11-09 09:09:10,882 INFO L242 Difference]: Finished difference. Result has 107 places, 102 transitions, 488 flow [2021-11-09 09:09:10,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=488, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2021-11-09 09:09:10,883 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 38 predicate places. [2021-11-09 09:09:10,883 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 488 flow [2021-11-09 09:09:10,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 46.69230769230769) internal successors, (1214), 26 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 09:09:10,884 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:10,884 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:10,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:11,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:11,107 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:11,107 INFO L85 PathProgramCache]: Analyzing trace with hash 952375869, now seen corresponding path program 3 times [2021-11-09 09:09:11,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:11,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105082162] [2021-11-09 09:09:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:11,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:11,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:11,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105082162] [2021-11-09 09:09:11,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105082162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:11,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047055016] [2021-11-09 09:09:11,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:09:11,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:11,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:11,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:11,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:09:11,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:09:11,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:11,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:11,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:12,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047055016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:12,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:12,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:12,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502785567] [2021-11-09 09:09:12,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:12,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:12,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:12,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:12,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:12,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 488 flow. Second operand has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:12,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:12,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:12,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:13,191 INFO L129 PetriNetUnfolder]: 174/559 cut-off events. [2021-11-09 09:09:13,191 INFO L130 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2021-11-09 09:09:13,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 559 events. 174/559 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2835 event pairs, 10 based on Foata normal form. 1/560 useless extension candidates. Maximal degree in co-relation 1552. Up to 109 conditions per place. [2021-11-09 09:09:13,199 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 90 selfloop transitions, 49 changer transitions 4/179 dead transitions. [2021-11-09 09:09:13,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 179 transitions, 1103 flow [2021-11-09 09:09:13,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:09:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 09:09:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1211 transitions. [2021-11-09 09:09:13,206 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469017094017094 [2021-11-09 09:09:13,206 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1211 transitions. [2021-11-09 09:09:13,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1211 transitions. [2021-11-09 09:09:13,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:13,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1211 transitions. [2021-11-09 09:09:13,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 50.458333333333336) internal successors, (1211), 24 states have internal predecessors, (1211), 0 states have call successors, (0), 0 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 09:09:13,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:09:13,221 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:09:13,221 INFO L186 Difference]: Start difference. First operand has 107 places, 102 transitions, 488 flow. Second operand 24 states and 1211 transitions. [2021-11-09 09:09:13,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 179 transitions, 1103 flow [2021-11-09 09:09:13,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 179 transitions, 1010 flow, removed 31 selfloop flow, removed 10 redundant places. [2021-11-09 09:09:13,242 INFO L242 Difference]: Finished difference. Result has 127 places, 119 transitions, 699 flow [2021-11-09 09:09:13,243 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=699, PETRI_PLACES=127, PETRI_TRANSITIONS=119} [2021-11-09 09:09:13,244 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 58 predicate places. [2021-11-09 09:09:13,244 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 119 transitions, 699 flow [2021-11-09 09:09:13,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:13,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:13,246 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:13,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:13,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:13,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash 558313231, now seen corresponding path program 4 times [2021-11-09 09:09:13,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:13,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663639682] [2021-11-09 09:09:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:13,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:13,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:13,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663639682] [2021-11-09 09:09:13,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663639682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:13,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599979654] [2021-11-09 09:09:13,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:09:13,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:13,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:13,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:13,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:09:13,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:09:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:14,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599979654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:14,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:14,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:09:14,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303594492] [2021-11-09 09:09:14,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:09:14,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:14,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:09:14,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:09:14,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:14,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 119 transitions, 699 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:09:14,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:14,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:14,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:15,273 INFO L129 PetriNetUnfolder]: 214/671 cut-off events. [2021-11-09 09:09:15,273 INFO L130 PetriNetUnfolder]: For 1501/1501 co-relation queries the response was YES. [2021-11-09 09:09:15,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 671 events. 214/671 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3678 event pairs, 56 based on Foata normal form. 8/678 useless extension candidates. Maximal degree in co-relation 2412. Up to 343 conditions per place. [2021-11-09 09:09:15,283 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 106 selfloop transitions, 22 changer transitions 10/174 dead transitions. [2021-11-09 09:09:15,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 174 transitions, 1400 flow [2021-11-09 09:09:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:09:15,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:09:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 807 transitions. [2021-11-09 09:09:15,287 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6466346153846154 [2021-11-09 09:09:15,287 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 807 transitions. [2021-11-09 09:09:15,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 807 transitions. [2021-11-09 09:09:15,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:15,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 807 transitions. [2021-11-09 09:09:15,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 50.4375) internal successors, (807), 16 states have internal predecessors, (807), 0 states have call successors, (0), 0 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 09:09:15,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:15,294 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:15,294 INFO L186 Difference]: Start difference. First operand has 127 places, 119 transitions, 699 flow. Second operand 16 states and 807 transitions. [2021-11-09 09:09:15,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 174 transitions, 1400 flow [2021-11-09 09:09:15,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 174 transitions, 1321 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-11-09 09:09:15,312 INFO L242 Difference]: Finished difference. Result has 140 places, 137 transitions, 941 flow [2021-11-09 09:09:15,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=941, PETRI_PLACES=140, PETRI_TRANSITIONS=137} [2021-11-09 09:09:15,312 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 71 predicate places. [2021-11-09 09:09:15,312 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 137 transitions, 941 flow [2021-11-09 09:09:15,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:09:15,313 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:15,313 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:15,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:15,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:09:15,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1451411985, now seen corresponding path program 5 times [2021-11-09 09:09:15,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:15,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977343691] [2021-11-09 09:09:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:15,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:15,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:15,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977343691] [2021-11-09 09:09:15,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977343691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:15,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212512667] [2021-11-09 09:09:15,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:09:15,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:15,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:15,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:15,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:09:16,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:09:16,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:16,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212512667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:16,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:16,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:16,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121735784] [2021-11-09 09:09:16,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:16,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:16,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:16,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:16,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:16,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 137 transitions, 941 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:16,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:16,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:16,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:17,491 INFO L129 PetriNetUnfolder]: 211/630 cut-off events. [2021-11-09 09:09:17,492 INFO L130 PetriNetUnfolder]: For 3252/3252 co-relation queries the response was YES. [2021-11-09 09:09:17,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2746 conditions, 630 events. 211/630 cut-off events. For 3252/3252 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3301 event pairs, 38 based on Foata normal form. 1/631 useless extension candidates. Maximal degree in co-relation 2710. Up to 127 conditions per place. [2021-11-09 09:09:17,504 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 85 selfloop transitions, 63 changer transitions 7/191 dead transitions. [2021-11-09 09:09:17,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 191 transitions, 1684 flow [2021-11-09 09:09:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:09:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:09:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1159 transitions. [2021-11-09 09:09:17,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460423634336678 [2021-11-09 09:09:17,511 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1159 transitions. [2021-11-09 09:09:17,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1159 transitions. [2021-11-09 09:09:17,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:17,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1159 transitions. [2021-11-09 09:09:17,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 50.391304347826086) internal successors, (1159), 23 states have internal predecessors, (1159), 0 states have call successors, (0), 0 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 09:09:17,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:09:17,526 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:09:17,526 INFO L186 Difference]: Start difference. First operand has 140 places, 137 transitions, 941 flow. Second operand 23 states and 1159 transitions. [2021-11-09 09:09:17,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 191 transitions, 1684 flow [2021-11-09 09:09:17,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 191 transitions, 1611 flow, removed 33 selfloop flow, removed 7 redundant places. [2021-11-09 09:09:17,577 INFO L242 Difference]: Finished difference. Result has 155 places, 137 transitions, 1052 flow [2021-11-09 09:09:17,578 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1052, PETRI_PLACES=155, PETRI_TRANSITIONS=137} [2021-11-09 09:09:17,578 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 86 predicate places. [2021-11-09 09:09:17,578 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 137 transitions, 1052 flow [2021-11-09 09:09:17,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:17,579 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:17,579 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:17,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:17,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:17,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash 295417423, now seen corresponding path program 6 times [2021-11-09 09:09:17,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:17,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118680142] [2021-11-09 09:09:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:17,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:09:17,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:17,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118680142] [2021-11-09 09:09:17,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118680142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:17,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132496686] [2021-11-09 09:09:17,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:09:17,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:17,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:17,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:09:18,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 09:09:18,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:09:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:09:18,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132496686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:18,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:18,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-09 09:09:18,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664781781] [2021-11-09 09:09:18,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:09:18,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:18,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:09:18,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:09:18,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 78 [2021-11-09 09:09:18,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 137 transitions, 1052 flow. Second operand has 7 states, 7 states have (on average 64.57142857142857) internal successors, (452), 7 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 09:09:18,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:18,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 78 [2021-11-09 09:09:18,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:18,553 INFO L129 PetriNetUnfolder]: 87/360 cut-off events. [2021-11-09 09:09:18,553 INFO L130 PetriNetUnfolder]: For 1553/1576 co-relation queries the response was YES. [2021-11-09 09:09:18,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 360 events. 87/360 cut-off events. For 1553/1576 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1608 event pairs, 1 based on Foata normal form. 14/369 useless extension candidates. Maximal degree in co-relation 1413. Up to 89 conditions per place. [2021-11-09 09:09:18,560 INFO L132 encePairwiseOnDemand]: 73/78 looper letters, 41 selfloop transitions, 39 changer transitions 0/150 dead transitions. [2021-11-09 09:09:18,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 1338 flow [2021-11-09 09:09:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:09:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-09 09:09:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 332 transitions. [2021-11-09 09:09:18,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512820512820513 [2021-11-09 09:09:18,562 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 332 transitions. [2021-11-09 09:09:18,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 332 transitions. [2021-11-09 09:09:18,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:18,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 332 transitions. [2021-11-09 09:09:18,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.4) internal successors, (332), 5 states have internal predecessors, (332), 0 states have call successors, (0), 0 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 09:09:18,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 09:09:18,566 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 09:09:18,566 INFO L186 Difference]: Start difference. First operand has 155 places, 137 transitions, 1052 flow. Second operand 5 states and 332 transitions. [2021-11-09 09:09:18,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 1338 flow [2021-11-09 09:09:18,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 150 transitions, 1188 flow, removed 5 selfloop flow, removed 23 redundant places. [2021-11-09 09:09:18,582 INFO L242 Difference]: Finished difference. Result has 136 places, 142 transitions, 1127 flow [2021-11-09 09:09:18,583 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1127, PETRI_PLACES=136, PETRI_TRANSITIONS=142} [2021-11-09 09:09:18,583 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 67 predicate places. [2021-11-09 09:09:18,583 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 142 transitions, 1127 flow [2021-11-09 09:09:18,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.57142857142857) internal successors, (452), 7 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 09:09:18,584 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:18,584 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:18,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:18,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:18,810 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash -349756625, now seen corresponding path program 7 times [2021-11-09 09:09:18,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:18,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953142069] [2021-11-09 09:09:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:18,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:19,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:19,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953142069] [2021-11-09 09:09:19,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953142069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:19,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467980808] [2021-11-09 09:09:19,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:09:19,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:19,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:19,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:09:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:20,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467980808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:20,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:20,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:09:20,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546848347] [2021-11-09 09:09:20,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:09:20,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:09:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:09:20,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:20,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 142 transitions, 1127 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:09:20,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:20,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:20,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:20,829 INFO L129 PetriNetUnfolder]: 256/746 cut-off events. [2021-11-09 09:09:20,829 INFO L130 PetriNetUnfolder]: For 5041/5041 co-relation queries the response was YES. [2021-11-09 09:09:20,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3657 conditions, 746 events. 256/746 cut-off events. For 5041/5041 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4141 event pairs, 67 based on Foata normal form. 1/744 useless extension candidates. Maximal degree in co-relation 3623. Up to 403 conditions per place. [2021-11-09 09:09:20,843 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 131 selfloop transitions, 29 changer transitions 10/206 dead transitions. [2021-11-09 09:09:20,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 206 transitions, 2212 flow [2021-11-09 09:09:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:09:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:09:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 796 transitions. [2021-11-09 09:09:20,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2021-11-09 09:09:20,846 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 796 transitions. [2021-11-09 09:09:20,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 796 transitions. [2021-11-09 09:09:20,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:20,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 796 transitions. [2021-11-09 09:09:20,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 49.75) internal successors, (796), 16 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 09:09:20,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:20,854 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:20,855 INFO L186 Difference]: Start difference. First operand has 136 places, 142 transitions, 1127 flow. Second operand 16 states and 796 transitions. [2021-11-09 09:09:20,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 206 transitions, 2212 flow [2021-11-09 09:09:20,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 206 transitions, 2164 flow, removed 23 selfloop flow, removed 1 redundant places. [2021-11-09 09:09:20,888 INFO L242 Difference]: Finished difference. Result has 163 places, 163 transitions, 1548 flow [2021-11-09 09:09:20,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1548, PETRI_PLACES=163, PETRI_TRANSITIONS=163} [2021-11-09 09:09:20,889 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 94 predicate places. [2021-11-09 09:09:20,889 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 163 transitions, 1548 flow [2021-11-09 09:09:20,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:09:20,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:20,890 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:20,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:21,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:09:21,103 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1875444017, now seen corresponding path program 8 times [2021-11-09 09:09:21,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:21,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109100308] [2021-11-09 09:09:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:21,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:21,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:21,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109100308] [2021-11-09 09:09:21,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109100308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:21,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992582479] [2021-11-09 09:09:21,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:09:21,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:21,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:21,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:09:21,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:09:21,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:21,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:21,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:22,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992582479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:22,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:22,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:22,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900369883] [2021-11-09 09:09:22,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:22,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:22,396 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:22,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 163 transitions, 1548 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:22,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:22,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:22,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:23,301 INFO L129 PetriNetUnfolder]: 300/907 cut-off events. [2021-11-09 09:09:23,302 INFO L130 PetriNetUnfolder]: For 6376/6376 co-relation queries the response was YES. [2021-11-09 09:09:23,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4511 conditions, 907 events. 300/907 cut-off events. For 6376/6376 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5533 event pairs, 65 based on Foata normal form. 1/908 useless extension candidates. Maximal degree in co-relation 4464. Up to 340 conditions per place. [2021-11-09 09:09:23,325 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 109 selfloop transitions, 76 changer transitions 4/225 dead transitions. [2021-11-09 09:09:23,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 225 transitions, 2532 flow [2021-11-09 09:09:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:09:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:09:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1038 transitions. [2021-11-09 09:09:23,329 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2021-11-09 09:09:23,329 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1038 transitions. [2021-11-09 09:09:23,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1038 transitions. [2021-11-09 09:09:23,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:23,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1038 transitions. [2021-11-09 09:09:23,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 49.42857142857143) internal successors, (1038), 21 states have internal predecessors, (1038), 0 states have call successors, (0), 0 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 09:09:23,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:09:23,336 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:09:23,336 INFO L186 Difference]: Start difference. First operand has 163 places, 163 transitions, 1548 flow. Second operand 21 states and 1038 transitions. [2021-11-09 09:09:23,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 225 transitions, 2532 flow [2021-11-09 09:09:23,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 225 transitions, 2397 flow, removed 63 selfloop flow, removed 6 redundant places. [2021-11-09 09:09:23,377 INFO L242 Difference]: Finished difference. Result has 181 places, 186 transitions, 1928 flow [2021-11-09 09:09:23,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1928, PETRI_PLACES=181, PETRI_TRANSITIONS=186} [2021-11-09 09:09:23,379 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 112 predicate places. [2021-11-09 09:09:23,379 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 186 transitions, 1928 flow [2021-11-09 09:09:23,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:23,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:23,380 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:23,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:23,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:23,606 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:23,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2002435393, now seen corresponding path program 9 times [2021-11-09 09:09:23,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:23,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586875896] [2021-11-09 09:09:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:23,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:23,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:23,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586875896] [2021-11-09 09:09:23,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586875896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:23,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888451688] [2021-11-09 09:09:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:09:23,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:23,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:23,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:09:24,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:09:24,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:24,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:24,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:25,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888451688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:25,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:25,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:25,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626038617] [2021-11-09 09:09:25,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:25,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:25,037 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:25,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 186 transitions, 1928 flow. Second operand has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:25,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:25,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:25,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:26,129 INFO L129 PetriNetUnfolder]: 311/949 cut-off events. [2021-11-09 09:09:26,129 INFO L130 PetriNetUnfolder]: For 6530/6530 co-relation queries the response was YES. [2021-11-09 09:09:26,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 949 events. 311/949 cut-off events. For 6530/6530 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5914 event pairs, 64 based on Foata normal form. 1/950 useless extension candidates. Maximal degree in co-relation 4718. Up to 346 conditions per place. [2021-11-09 09:09:26,149 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 122 selfloop transitions, 86 changer transitions 4/248 dead transitions. [2021-11-09 09:09:26,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 248 transitions, 2937 flow [2021-11-09 09:09:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:09:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 09:09:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1284 transitions. [2021-11-09 09:09:26,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6331360946745562 [2021-11-09 09:09:26,153 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1284 transitions. [2021-11-09 09:09:26,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1284 transitions. [2021-11-09 09:09:26,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:26,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1284 transitions. [2021-11-09 09:09:26,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 49.38461538461539) internal successors, (1284), 26 states have internal predecessors, (1284), 0 states have call successors, (0), 0 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 09:09:26,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:09:26,163 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:09:26,163 INFO L186 Difference]: Start difference. First operand has 181 places, 186 transitions, 1928 flow. Second operand 26 states and 1284 transitions. [2021-11-09 09:09:26,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 248 transitions, 2937 flow [2021-11-09 09:09:26,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 248 transitions, 2838 flow, removed 26 selfloop flow, removed 6 redundant places. [2021-11-09 09:09:26,216 INFO L242 Difference]: Finished difference. Result has 204 places, 197 transitions, 2201 flow [2021-11-09 09:09:26,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2201, PETRI_PLACES=204, PETRI_TRANSITIONS=197} [2021-11-09 09:09:26,217 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 135 predicate places. [2021-11-09 09:09:26,217 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 197 transitions, 2201 flow [2021-11-09 09:09:26,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:26,218 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:26,218 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:26,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:26,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:26,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash -589567613, now seen corresponding path program 10 times [2021-11-09 09:09:26,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:26,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432368323] [2021-11-09 09:09:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:26,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:26,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:26,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432368323] [2021-11-09 09:09:26,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432368323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:26,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710013813] [2021-11-09 09:09:26,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:09:26,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:26,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:26,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:26,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:09:27,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:09:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:27,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710013813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:27,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:27,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:27,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016325773] [2021-11-09 09:09:27,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:27,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:27,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:27,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 197 transitions, 2201 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:27,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:27,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:27,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:28,709 INFO L129 PetriNetUnfolder]: 311/932 cut-off events. [2021-11-09 09:09:28,709 INFO L130 PetriNetUnfolder]: For 7786/7786 co-relation queries the response was YES. [2021-11-09 09:09:28,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4971 conditions, 932 events. 311/932 cut-off events. For 7786/7786 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5722 event pairs, 67 based on Foata normal form. 1/933 useless extension candidates. Maximal degree in co-relation 4916. Up to 346 conditions per place. [2021-11-09 09:09:28,730 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 118 selfloop transitions, 81 changer transitions 7/242 dead transitions. [2021-11-09 09:09:28,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 242 transitions, 3030 flow [2021-11-09 09:09:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:09:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:09:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1095 transitions. [2021-11-09 09:09:28,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6381118881118881 [2021-11-09 09:09:28,733 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1095 transitions. [2021-11-09 09:09:28,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1095 transitions. [2021-11-09 09:09:28,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:28,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1095 transitions. [2021-11-09 09:09:28,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.77272727272727) internal successors, (1095), 22 states have internal predecessors, (1095), 0 states have call successors, (0), 0 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 09:09:28,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:09:28,742 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:09:28,742 INFO L186 Difference]: Start difference. First operand has 204 places, 197 transitions, 2201 flow. Second operand 22 states and 1095 transitions. [2021-11-09 09:09:28,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 242 transitions, 3030 flow [2021-11-09 09:09:28,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 242 transitions, 2839 flow, removed 33 selfloop flow, removed 15 redundant places. [2021-11-09 09:09:28,799 INFO L242 Difference]: Finished difference. Result has 210 places, 195 transitions, 2173 flow [2021-11-09 09:09:28,800 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2173, PETRI_PLACES=210, PETRI_TRANSITIONS=195} [2021-11-09 09:09:28,800 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 141 predicate places. [2021-11-09 09:09:28,800 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 195 transitions, 2173 flow [2021-11-09 09:09:28,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:28,801 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:28,801 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:28,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:29,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:09:29,014 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash -900438685, now seen corresponding path program 11 times [2021-11-09 09:09:29,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:29,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545679589] [2021-11-09 09:09:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:29,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:29,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:29,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545679589] [2021-11-09 09:09:29,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545679589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:29,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315869411] [2021-11-09 09:09:29,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:09:29,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:29,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:29,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:09:29,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 09:09:29,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:29,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:30,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315869411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:30,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:30,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:30,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28721803] [2021-11-09 09:09:30,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:30,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:30,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:30,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 195 transitions, 2173 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:30,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:30,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:30,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:31,284 INFO L129 PetriNetUnfolder]: 353/1092 cut-off events. [2021-11-09 09:09:31,285 INFO L130 PetriNetUnfolder]: For 9579/9579 co-relation queries the response was YES. [2021-11-09 09:09:31,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5735 conditions, 1092 events. 353/1092 cut-off events. For 9579/9579 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7229 event pairs, 81 based on Foata normal form. 1/1092 useless extension candidates. Maximal degree in co-relation 5680. Up to 491 conditions per place. [2021-11-09 09:09:31,307 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 139 selfloop transitions, 68 changer transitions 4/247 dead transitions. [2021-11-09 09:09:31,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 247 transitions, 3126 flow [2021-11-09 09:09:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:09:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:09:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1038 transitions. [2021-11-09 09:09:31,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6336996336996337 [2021-11-09 09:09:31,311 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1038 transitions. [2021-11-09 09:09:31,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1038 transitions. [2021-11-09 09:09:31,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:31,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1038 transitions. [2021-11-09 09:09:31,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 49.42857142857143) internal successors, (1038), 21 states have internal predecessors, (1038), 0 states have call successors, (0), 0 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 09:09:31,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:09:31,318 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:09:31,319 INFO L186 Difference]: Start difference. First operand has 210 places, 195 transitions, 2173 flow. Second operand 21 states and 1038 transitions. [2021-11-09 09:09:31,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 247 transitions, 3126 flow [2021-11-09 09:09:31,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 2912 flow, removed 15 selfloop flow, removed 22 redundant places. [2021-11-09 09:09:31,377 INFO L242 Difference]: Finished difference. Result has 211 places, 213 transitions, 2398 flow [2021-11-09 09:09:31,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2398, PETRI_PLACES=211, PETRI_TRANSITIONS=213} [2021-11-09 09:09:31,378 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 142 predicate places. [2021-11-09 09:09:31,378 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 213 transitions, 2398 flow [2021-11-09 09:09:31,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:31,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:31,387 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:31,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:31,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:09:31,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:31,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1401271541, now seen corresponding path program 12 times [2021-11-09 09:09:31,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:31,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561862815] [2021-11-09 09:09:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:31,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:31,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:31,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561862815] [2021-11-09 09:09:31,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561862815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:31,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420287164] [2021-11-09 09:09:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:09:31,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:31,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:31,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:31,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:09:32,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:09:32,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:33,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420287164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:33,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:33,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:33,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990202479] [2021-11-09 09:09:33,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:33,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:33,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:33,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 213 transitions, 2398 flow. Second operand has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:33,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:33,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:33,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:34,126 INFO L129 PetriNetUnfolder]: 372/1155 cut-off events. [2021-11-09 09:09:34,127 INFO L130 PetriNetUnfolder]: For 10500/10500 co-relation queries the response was YES. [2021-11-09 09:09:34,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6120 conditions, 1155 events. 372/1155 cut-off events. For 10500/10500 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7820 event pairs, 82 based on Foata normal form. 1/1155 useless extension candidates. Maximal degree in co-relation 6061. Up to 498 conditions per place. [2021-11-09 09:09:34,149 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 153 selfloop transitions, 78 changer transitions 4/271 dead transitions. [2021-11-09 09:09:34,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 271 transitions, 3470 flow [2021-11-09 09:09:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:09:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 09:09:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1237 transitions. [2021-11-09 09:09:34,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6343589743589744 [2021-11-09 09:09:34,153 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1237 transitions. [2021-11-09 09:09:34,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1237 transitions. [2021-11-09 09:09:34,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:34,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1237 transitions. [2021-11-09 09:09:34,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 49.48) internal successors, (1237), 25 states have internal predecessors, (1237), 0 states have call successors, (0), 0 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 09:09:34,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 78.0) internal successors, (2028), 26 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 09:09:34,161 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 78.0) internal successors, (2028), 26 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 09:09:34,162 INFO L186 Difference]: Start difference. First operand has 211 places, 213 transitions, 2398 flow. Second operand 25 states and 1237 transitions. [2021-11-09 09:09:34,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 271 transitions, 3470 flow [2021-11-09 09:09:34,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 271 transitions, 3340 flow, removed 28 selfloop flow, removed 9 redundant places. [2021-11-09 09:09:34,222 INFO L242 Difference]: Finished difference. Result has 232 places, 223 transitions, 2666 flow [2021-11-09 09:09:34,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2666, PETRI_PLACES=232, PETRI_TRANSITIONS=223} [2021-11-09 09:09:34,223 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 163 predicate places. [2021-11-09 09:09:34,223 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 223 transitions, 2666 flow [2021-11-09 09:09:34,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:34,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:34,224 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:34,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:34,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:09:34,426 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash 315899825, now seen corresponding path program 13 times [2021-11-09 09:09:34,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:34,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913085221] [2021-11-09 09:09:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:34,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:34,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:34,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913085221] [2021-11-09 09:09:34,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913085221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:34,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373854342] [2021-11-09 09:09:34,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:09:34,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:34,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:34,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:34,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:09:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:35,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:36,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373854342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:36,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:36,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:36,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208575031] [2021-11-09 09:09:36,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:36,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:36,104 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:36,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 223 transitions, 2666 flow. Second operand has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:36,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:36,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:36,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:36,934 INFO L129 PetriNetUnfolder]: 386/1194 cut-off events. [2021-11-09 09:09:36,934 INFO L130 PetriNetUnfolder]: For 13027/13027 co-relation queries the response was YES. [2021-11-09 09:09:36,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6695 conditions, 1194 events. 386/1194 cut-off events. For 13027/13027 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8194 event pairs, 82 based on Foata normal form. 1/1194 useless extension candidates. Maximal degree in co-relation 6629. Up to 518 conditions per place. [2021-11-09 09:09:36,960 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 158 selfloop transitions, 73 changer transitions 7/274 dead transitions. [2021-11-09 09:09:36,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 274 transitions, 3732 flow [2021-11-09 09:09:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:09:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:09:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 952 transitions. [2021-11-09 09:09:36,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423751686909581 [2021-11-09 09:09:36,974 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 952 transitions. [2021-11-09 09:09:36,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 952 transitions. [2021-11-09 09:09:36,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:36,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 952 transitions. [2021-11-09 09:09:36,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 50.10526315789474) internal successors, (952), 19 states have internal predecessors, (952), 0 states have call successors, (0), 0 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 09:09:36,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:09:36,985 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:09:36,986 INFO L186 Difference]: Start difference. First operand has 232 places, 223 transitions, 2666 flow. Second operand 19 states and 952 transitions. [2021-11-09 09:09:36,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 274 transitions, 3732 flow [2021-11-09 09:09:37,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 274 transitions, 3453 flow, removed 72 selfloop flow, removed 17 redundant places. [2021-11-09 09:09:37,071 INFO L242 Difference]: Finished difference. Result has 236 places, 231 transitions, 2749 flow [2021-11-09 09:09:37,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2749, PETRI_PLACES=236, PETRI_TRANSITIONS=231} [2021-11-09 09:09:37,072 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 167 predicate places. [2021-11-09 09:09:37,072 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 231 transitions, 2749 flow [2021-11-09 09:09:37,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.608695652173914) internal successors, (1072), 23 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 09:09:37,072 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:37,072 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:37,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:37,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:09:37,273 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash 345215089, now seen corresponding path program 14 times [2021-11-09 09:09:37,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:37,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857778535] [2021-11-09 09:09:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:37,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:37,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:37,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857778535] [2021-11-09 09:09:37,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857778535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:37,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738917906] [2021-11-09 09:09:37,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:09:37,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:37,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:37,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:37,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:09:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:09:38,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:38,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:38,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738917906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:38,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:38,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:38,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130758760] [2021-11-09 09:09:38,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:38,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:38,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:38,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:38,807 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:38,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 231 transitions, 2749 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:38,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:38,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:38,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:39,737 INFO L129 PetriNetUnfolder]: 393/1213 cut-off events. [2021-11-09 09:09:39,737 INFO L130 PetriNetUnfolder]: For 13043/13043 co-relation queries the response was YES. [2021-11-09 09:09:39,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6746 conditions, 1213 events. 393/1213 cut-off events. For 13043/13043 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8396 event pairs, 94 based on Foata normal form. 1/1213 useless extension candidates. Maximal degree in co-relation 6677. Up to 498 conditions per place. [2021-11-09 09:09:39,756 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 153 selfloop transitions, 82 changer transitions 4/275 dead transitions. [2021-11-09 09:09:39,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 275 transitions, 3682 flow [2021-11-09 09:09:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:09:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:09:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 990 transitions. [2021-11-09 09:09:39,760 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2021-11-09 09:09:39,760 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 990 transitions. [2021-11-09 09:09:39,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 990 transitions. [2021-11-09 09:09:39,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:39,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 990 transitions. [2021-11-09 09:09:39,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.5) internal successors, (990), 20 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 09:09:39,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:09:39,772 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:09:39,772 INFO L186 Difference]: Start difference. First operand has 236 places, 231 transitions, 2749 flow. Second operand 20 states and 990 transitions. [2021-11-09 09:09:39,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 275 transitions, 3682 flow [2021-11-09 09:09:39,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 275 transitions, 3554 flow, removed 12 selfloop flow, removed 14 redundant places. [2021-11-09 09:09:39,852 INFO L242 Difference]: Finished difference. Result has 244 places, 242 transitions, 3004 flow [2021-11-09 09:09:39,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3004, PETRI_PLACES=244, PETRI_TRANSITIONS=242} [2021-11-09 09:09:39,853 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 175 predicate places. [2021-11-09 09:09:39,853 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 242 transitions, 3004 flow [2021-11-09 09:09:39,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:39,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:39,854 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:39,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:40,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:09:40,067 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2135485463, now seen corresponding path program 15 times [2021-11-09 09:09:40,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:40,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466733828] [2021-11-09 09:09:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:40,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:40,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:40,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466733828] [2021-11-09 09:09:40,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466733828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:40,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819205992] [2021-11-09 09:09:40,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:09:40,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:40,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:40,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:40,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:09:41,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:09:41,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:41,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819205992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:41,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:41,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:41,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915327230] [2021-11-09 09:09:41,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:41,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:41,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:41,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 242 transitions, 3004 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:41,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:41,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:41,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:42,734 INFO L129 PetriNetUnfolder]: 404/1247 cut-off events. [2021-11-09 09:09:42,734 INFO L130 PetriNetUnfolder]: For 15242/15242 co-relation queries the response was YES. [2021-11-09 09:09:42,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7153 conditions, 1247 events. 404/1247 cut-off events. For 15242/15242 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8659 event pairs, 87 based on Foata normal form. 1/1247 useless extension candidates. Maximal degree in co-relation 7082. Up to 504 conditions per place. [2021-11-09 09:09:42,762 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 164 selfloop transitions, 92 changer transitions 4/296 dead transitions. [2021-11-09 09:09:42,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 296 transitions, 4146 flow [2021-11-09 09:09:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:09:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:09:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1329 transitions. [2021-11-09 09:09:42,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6310541310541311 [2021-11-09 09:09:42,766 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1329 transitions. [2021-11-09 09:09:42,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1329 transitions. [2021-11-09 09:09:42,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:42,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1329 transitions. [2021-11-09 09:09:42,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 49.22222222222222) internal successors, (1329), 27 states have internal predecessors, (1329), 0 states have call successors, (0), 0 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 09:09:42,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:09:42,773 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:09:42,774 INFO L186 Difference]: Start difference. First operand has 244 places, 242 transitions, 3004 flow. Second operand 27 states and 1329 transitions. [2021-11-09 09:09:42,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 296 transitions, 4146 flow [2021-11-09 09:09:42,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 296 transitions, 3876 flow, removed 41 selfloop flow, removed 17 redundant places. [2021-11-09 09:09:42,874 INFO L242 Difference]: Finished difference. Result has 257 places, 251 transitions, 3167 flow [2021-11-09 09:09:42,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3167, PETRI_PLACES=257, PETRI_TRANSITIONS=251} [2021-11-09 09:09:42,875 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 188 predicate places. [2021-11-09 09:09:42,875 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 251 transitions, 3167 flow [2021-11-09 09:09:42,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:42,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:42,876 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:42,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:43,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:09:43,098 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash -673465925, now seen corresponding path program 16 times [2021-11-09 09:09:43,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:43,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587263407] [2021-11-09 09:09:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:43,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:43,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:43,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587263407] [2021-11-09 09:09:43,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587263407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:43,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683551049] [2021-11-09 09:09:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:09:43,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:43,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:43,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:43,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:09:44,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:09:44,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:44,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683551049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:44,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:44,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:44,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334593939] [2021-11-09 09:09:44,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:44,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:44,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:44,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:44,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 251 transitions, 3167 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:44,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:44,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:44,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:45,802 INFO L129 PetriNetUnfolder]: 404/1238 cut-off events. [2021-11-09 09:09:45,803 INFO L130 PetriNetUnfolder]: For 17275/17275 co-relation queries the response was YES. [2021-11-09 09:09:45,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7311 conditions, 1238 events. 404/1238 cut-off events. For 17275/17275 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8602 event pairs, 88 based on Foata normal form. 1/1238 useless extension candidates. Maximal degree in co-relation 7239. Up to 504 conditions per place. [2021-11-09 09:09:45,831 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 160 selfloop transitions, 87 changer transitions 7/290 dead transitions. [2021-11-09 09:09:45,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 290 transitions, 4072 flow [2021-11-09 09:09:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:09:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:09:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1140 transitions. [2021-11-09 09:09:45,834 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6354515050167224 [2021-11-09 09:09:45,834 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1140 transitions. [2021-11-09 09:09:45,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1140 transitions. [2021-11-09 09:09:45,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:45,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1140 transitions. [2021-11-09 09:09:45,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 49.56521739130435) internal successors, (1140), 23 states have internal predecessors, (1140), 0 states have call successors, (0), 0 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 09:09:45,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:09:45,840 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:09:45,840 INFO L186 Difference]: Start difference. First operand has 257 places, 251 transitions, 3167 flow. Second operand 23 states and 1140 transitions. [2021-11-09 09:09:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 290 transitions, 4072 flow [2021-11-09 09:09:45,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 290 transitions, 3825 flow, removed 55 selfloop flow, removed 17 redundant places. [2021-11-09 09:09:45,956 INFO L242 Difference]: Finished difference. Result has 262 places, 249 transitions, 3095 flow [2021-11-09 09:09:45,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3095, PETRI_PLACES=262, PETRI_TRANSITIONS=249} [2021-11-09 09:09:45,957 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 193 predicate places. [2021-11-09 09:09:45,957 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 249 transitions, 3095 flow [2021-11-09 09:09:45,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:45,958 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:45,958 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:45,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-09 09:09:46,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:46,174 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1645474657, now seen corresponding path program 17 times [2021-11-09 09:09:46,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:46,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244515051] [2021-11-09 09:09:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:46,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:46,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:46,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244515051] [2021-11-09 09:09:46,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244515051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:46,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697668669] [2021-11-09 09:09:46,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:09:46,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:46,509 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:46,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:09:47,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:09:47,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:47,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697668669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:47,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:47,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-11-09 09:09:47,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863336318] [2021-11-09 09:09:47,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:09:47,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:09:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:09:47,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:47,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 249 transitions, 3095 flow. Second operand has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:47,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:47,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:47,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:48,572 INFO L129 PetriNetUnfolder]: 402/1214 cut-off events. [2021-11-09 09:09:48,573 INFO L130 PetriNetUnfolder]: For 17007/17007 co-relation queries the response was YES. [2021-11-09 09:09:48,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7211 conditions, 1214 events. 402/1214 cut-off events. For 17007/17007 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8329 event pairs, 82 based on Foata normal form. 1/1214 useless extension candidates. Maximal degree in co-relation 7139. Up to 524 conditions per place. [2021-11-09 09:09:48,592 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 166 selfloop transitions, 82 changer transitions 7/291 dead transitions. [2021-11-09 09:09:48,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 291 transitions, 4039 flow [2021-11-09 09:09:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:09:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:09:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1001 transitions. [2021-11-09 09:09:48,609 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2021-11-09 09:09:48,609 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1001 transitions. [2021-11-09 09:09:48,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1001 transitions. [2021-11-09 09:09:48,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:48,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1001 transitions. [2021-11-09 09:09:48,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 50.05) internal successors, (1001), 20 states have internal predecessors, (1001), 0 states have call successors, (0), 0 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 09:09:48,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:09:48,615 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:09:48,615 INFO L186 Difference]: Start difference. First operand has 262 places, 249 transitions, 3095 flow. Second operand 20 states and 1001 transitions. [2021-11-09 09:09:48,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 291 transitions, 4039 flow [2021-11-09 09:09:48,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 291 transitions, 3867 flow, removed 13 selfloop flow, removed 22 redundant places. [2021-11-09 09:09:48,726 INFO L242 Difference]: Finished difference. Result has 256 places, 247 transitions, 3092 flow [2021-11-09 09:09:48,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3092, PETRI_PLACES=256, PETRI_TRANSITIONS=247} [2021-11-09 09:09:48,727 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 187 predicate places. [2021-11-09 09:09:48,727 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 247 transitions, 3092 flow [2021-11-09 09:09:48,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 46.56521739130435) internal successors, (1071), 23 states have internal predecessors, (1071), 0 states have call successors, (0), 0 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 09:09:48,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:48,728 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:48,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:48,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-09 09:09:48,942 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1077881799, now seen corresponding path program 18 times [2021-11-09 09:09:48,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:48,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477808198] [2021-11-09 09:09:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:48,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:49,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477808198] [2021-11-09 09:09:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477808198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762454142] [2021-11-09 09:09:49,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:09:49,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:49,207 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:49,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:09:50,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:09:50,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:50,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:50,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762454142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:50,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:50,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:09:50,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116656689] [2021-11-09 09:09:50,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:09:50,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:09:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:09:50,591 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:50,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 247 transitions, 3092 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:09:50,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:50,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:50,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:51,203 INFO L129 PetriNetUnfolder]: 460/1428 cut-off events. [2021-11-09 09:09:51,203 INFO L130 PetriNetUnfolder]: For 19658/19658 co-relation queries the response was YES. [2021-11-09 09:09:51,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8334 conditions, 1428 events. 460/1428 cut-off events. For 19658/19658 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10453 event pairs, 141 based on Foata normal form. 1/1427 useless extension candidates. Maximal degree in co-relation 8264. Up to 826 conditions per place. [2021-11-09 09:09:51,224 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 232 selfloop transitions, 32 changer transitions 10/310 dead transitions. [2021-11-09 09:09:51,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 310 transitions, 4412 flow [2021-11-09 09:09:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:09:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:09:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 801 transitions. [2021-11-09 09:09:51,234 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6418269230769231 [2021-11-09 09:09:51,234 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 801 transitions. [2021-11-09 09:09:51,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 801 transitions. [2021-11-09 09:09:51,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:51,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 801 transitions. [2021-11-09 09:09:51,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 50.0625) internal successors, (801), 16 states have internal predecessors, (801), 0 states have call successors, (0), 0 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 09:09:51,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:51,238 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:51,238 INFO L186 Difference]: Start difference. First operand has 256 places, 247 transitions, 3092 flow. Second operand 16 states and 801 transitions. [2021-11-09 09:09:51,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 310 transitions, 4412 flow [2021-11-09 09:09:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 310 transitions, 4198 flow, removed 12 selfloop flow, removed 20 redundant places. [2021-11-09 09:09:51,359 INFO L242 Difference]: Finished difference. Result has 258 places, 266 transitions, 3388 flow [2021-11-09 09:09:51,360 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3388, PETRI_PLACES=258, PETRI_TRANSITIONS=266} [2021-11-09 09:09:51,360 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 189 predicate places. [2021-11-09 09:09:51,360 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 266 transitions, 3388 flow [2021-11-09 09:09:51,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:09:51,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:51,361 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:51,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:51,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:09:51,582 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1232929395, now seen corresponding path program 19 times [2021-11-09 09:09:51,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:51,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430009986] [2021-11-09 09:09:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:51,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:51,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:51,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430009986] [2021-11-09 09:09:51,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430009986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:51,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539048410] [2021-11-09 09:09:51,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:09:51,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:51,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:51,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:09:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:53,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539048410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:53,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:53,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:09:53,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018345217] [2021-11-09 09:09:53,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:09:53,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:53,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:09:53,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:09:53,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:53,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 266 transitions, 3388 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:09:53,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:53,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:53,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:54,066 INFO L129 PetriNetUnfolder]: 508/1588 cut-off events. [2021-11-09 09:09:54,066 INFO L130 PetriNetUnfolder]: For 22799/22799 co-relation queries the response was YES. [2021-11-09 09:09:54,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9393 conditions, 1588 events. 508/1588 cut-off events. For 22799/22799 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11984 event pairs, 158 based on Foata normal form. 1/1588 useless extension candidates. Maximal degree in co-relation 9315. Up to 836 conditions per place. [2021-11-09 09:09:54,100 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 235 selfloop transitions, 45 changer transitions 8/324 dead transitions. [2021-11-09 09:09:54,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 324 transitions, 4702 flow [2021-11-09 09:09:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:09:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:09:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 799 transitions. [2021-11-09 09:09:54,102 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6402243589743589 [2021-11-09 09:09:54,102 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 799 transitions. [2021-11-09 09:09:54,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 799 transitions. [2021-11-09 09:09:54,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:54,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 799 transitions. [2021-11-09 09:09:54,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 49.9375) internal successors, (799), 16 states have internal predecessors, (799), 0 states have call successors, (0), 0 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 09:09:54,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:54,107 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:54,107 INFO L186 Difference]: Start difference. First operand has 258 places, 266 transitions, 3388 flow. Second operand 16 states and 799 transitions. [2021-11-09 09:09:54,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 324 transitions, 4702 flow [2021-11-09 09:09:54,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 324 transitions, 4602 flow, removed 44 selfloop flow, removed 6 redundant places. [2021-11-09 09:09:54,236 INFO L242 Difference]: Finished difference. Result has 274 places, 280 transitions, 3769 flow [2021-11-09 09:09:54,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3769, PETRI_PLACES=274, PETRI_TRANSITIONS=280} [2021-11-09 09:09:54,237 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 205 predicate places. [2021-11-09 09:09:54,237 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 280 transitions, 3769 flow [2021-11-09 09:09:54,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:09:54,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:54,238 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:54,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:54,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 09:09:54,454 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash -407707971, now seen corresponding path program 20 times [2021-11-09 09:09:54,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:54,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797071084] [2021-11-09 09:09:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:54,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:54,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:54,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797071084] [2021-11-09 09:09:54,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797071084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:54,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914702697] [2021-11-09 09:09:54,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:09:54,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:54,703 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:54,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:09:55,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:09:55,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:55,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:56,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914702697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:56,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:56,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:09:56,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870911943] [2021-11-09 09:09:56,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:09:56,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:09:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:09:56,260 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:56,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 280 transitions, 3769 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:09:56,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:56,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:56,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:09:56,932 INFO L129 PetriNetUnfolder]: 507/1597 cut-off events. [2021-11-09 09:09:56,932 INFO L130 PetriNetUnfolder]: For 24844/24844 co-relation queries the response was YES. [2021-11-09 09:09:56,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9694 conditions, 1597 events. 507/1597 cut-off events. For 24844/24844 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12169 event pairs, 152 based on Foata normal form. 1/1596 useless extension candidates. Maximal degree in co-relation 9609. Up to 810 conditions per place. [2021-11-09 09:09:56,959 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 238 selfloop transitions, 50 changer transitions 11/335 dead transitions. [2021-11-09 09:09:56,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 335 transitions, 5020 flow [2021-11-09 09:09:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:09:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:09:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 799 transitions. [2021-11-09 09:09:56,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6402243589743589 [2021-11-09 09:09:56,962 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 799 transitions. [2021-11-09 09:09:56,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 799 transitions. [2021-11-09 09:09:56,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:09:56,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 799 transitions. [2021-11-09 09:09:56,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 49.9375) internal successors, (799), 16 states have internal predecessors, (799), 0 states have call successors, (0), 0 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 09:09:56,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:56,967 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:09:56,967 INFO L186 Difference]: Start difference. First operand has 274 places, 280 transitions, 3769 flow. Second operand 16 states and 799 transitions. [2021-11-09 09:09:56,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 335 transitions, 5020 flow [2021-11-09 09:09:57,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 335 transitions, 4928 flow, removed 34 selfloop flow, removed 8 redundant places. [2021-11-09 09:09:57,117 INFO L242 Difference]: Finished difference. Result has 287 places, 286 transitions, 3984 flow [2021-11-09 09:09:57,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3984, PETRI_PLACES=287, PETRI_TRANSITIONS=286} [2021-11-09 09:09:57,118 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 218 predicate places. [2021-11-09 09:09:57,118 INFO L470 AbstractCegarLoop]: Abstraction has has 287 places, 286 transitions, 3984 flow [2021-11-09 09:09:57,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:09:57,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:09:57,119 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:09:57,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:09:57,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:09:57,346 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:09:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:09:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1716478411, now seen corresponding path program 21 times [2021-11-09 09:09:57,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:09:57,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000554003] [2021-11-09 09:09:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:09:57,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:09:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:09:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:57,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:09:57,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000554003] [2021-11-09 09:09:57,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000554003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:57,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260059695] [2021-11-09 09:09:57,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:09:57,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:09:57,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:09:57,637 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:09:57,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:09:58,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:09:58,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:09:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:09:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:09:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:09:59,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260059695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:09:59,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:09:59,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:09:59,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140227689] [2021-11-09 09:09:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:09:59,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:09:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:09:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:09:59,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:09:59,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 286 transitions, 3984 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:09:59,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:09:59,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:09:59,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:00,178 INFO L129 PetriNetUnfolder]: 518/1645 cut-off events. [2021-11-09 09:10:00,178 INFO L130 PetriNetUnfolder]: For 27971/27971 co-relation queries the response was YES. [2021-11-09 09:10:00,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10302 conditions, 1645 events. 518/1645 cut-off events. For 27971/27971 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12689 event pairs, 156 based on Foata normal form. 2/1646 useless extension candidates. Maximal degree in co-relation 10211. Up to 952 conditions per place. [2021-11-09 09:10:00,212 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 249 selfloop transitions, 56 changer transitions 4/345 dead transitions. [2021-11-09 09:10:00,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 345 transitions, 5449 flow [2021-11-09 09:10:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:10:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:10:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1082 transitions. [2021-11-09 09:10:00,214 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6305361305361306 [2021-11-09 09:10:00,214 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1082 transitions. [2021-11-09 09:10:00,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1082 transitions. [2021-11-09 09:10:00,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:00,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1082 transitions. [2021-11-09 09:10:00,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.18181818181818) internal successors, (1082), 22 states have internal predecessors, (1082), 0 states have call successors, (0), 0 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 09:10:00,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:10:00,220 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:10:00,220 INFO L186 Difference]: Start difference. First operand has 287 places, 286 transitions, 3984 flow. Second operand 22 states and 1082 transitions. [2021-11-09 09:10:00,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 345 transitions, 5449 flow [2021-11-09 09:10:00,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 345 transitions, 5286 flow, removed 58 selfloop flow, removed 8 redundant places. [2021-11-09 09:10:00,369 INFO L242 Difference]: Finished difference. Result has 302 places, 311 transitions, 4525 flow [2021-11-09 09:10:00,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4525, PETRI_PLACES=302, PETRI_TRANSITIONS=311} [2021-11-09 09:10:00,370 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 233 predicate places. [2021-11-09 09:10:00,370 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 311 transitions, 4525 flow [2021-11-09 09:10:00,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:00,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:00,371 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:00,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:00,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:10:00,594 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:00,595 INFO L85 PathProgramCache]: Analyzing trace with hash 417642931, now seen corresponding path program 22 times [2021-11-09 09:10:00,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:00,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986375130] [2021-11-09 09:10:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:00,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:00,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:00,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986375130] [2021-11-09 09:10:00,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986375130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:00,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517999139] [2021-11-09 09:10:00,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:10:00,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:00,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:00,806 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:00,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:10:01,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:10:01,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:02,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517999139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:02,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:02,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:02,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11369042] [2021-11-09 09:10:02,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:02,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:02,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:02,334 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:02,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 311 transitions, 4525 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:02,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:02,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:02,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:03,486 INFO L129 PetriNetUnfolder]: 575/1897 cut-off events. [2021-11-09 09:10:03,486 INFO L130 PetriNetUnfolder]: For 33705/33705 co-relation queries the response was YES. [2021-11-09 09:10:03,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11966 conditions, 1897 events. 575/1897 cut-off events. For 33705/33705 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15508 event pairs, 167 based on Foata normal form. 4/1899 useless extension candidates. Maximal degree in co-relation 11874. Up to 900 conditions per place. [2021-11-09 09:10:03,512 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 265 selfloop transitions, 87 changer transitions 6/394 dead transitions. [2021-11-09 09:10:03,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 394 transitions, 6431 flow [2021-11-09 09:10:03,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:10:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 09:10:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1380 transitions. [2021-11-09 09:10:03,515 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6318681318681318 [2021-11-09 09:10:03,515 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1380 transitions. [2021-11-09 09:10:03,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1380 transitions. [2021-11-09 09:10:03,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:03,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1380 transitions. [2021-11-09 09:10:03,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 49.285714285714285) internal successors, (1380), 28 states have internal predecessors, (1380), 0 states have call successors, (0), 0 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 09:10:03,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:10:03,523 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:10:03,523 INFO L186 Difference]: Start difference. First operand has 302 places, 311 transitions, 4525 flow. Second operand 28 states and 1380 transitions. [2021-11-09 09:10:03,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 394 transitions, 6431 flow [2021-11-09 09:10:03,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 394 transitions, 6108 flow, removed 140 selfloop flow, removed 7 redundant places. [2021-11-09 09:10:03,802 INFO L242 Difference]: Finished difference. Result has 330 places, 342 transitions, 5171 flow [2021-11-09 09:10:03,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5171, PETRI_PLACES=330, PETRI_TRANSITIONS=342} [2021-11-09 09:10:03,803 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 261 predicate places. [2021-11-09 09:10:03,804 INFO L470 AbstractCegarLoop]: Abstraction has has 330 places, 342 transitions, 5171 flow [2021-11-09 09:10:03,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:03,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:03,805 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:03,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:04,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:04,026 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 605066257, now seen corresponding path program 23 times [2021-11-09 09:10:04,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:04,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114456817] [2021-11-09 09:10:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:04,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:04,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:04,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114456817] [2021-11-09 09:10:04,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114456817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:04,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944469859] [2021-11-09 09:10:04,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:10:04,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:04,228 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:04,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:10:05,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:10:05,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:05,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:05,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944469859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:05,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:05,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:05,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582973626] [2021-11-09 09:10:05,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:05,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:05,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:05,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:05,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:05,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 342 transitions, 5171 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:05,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:05,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:05,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:06,918 INFO L129 PetriNetUnfolder]: 594/2002 cut-off events. [2021-11-09 09:10:06,918 INFO L130 PetriNetUnfolder]: For 36557/36557 co-relation queries the response was YES. [2021-11-09 09:10:06,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12665 conditions, 2002 events. 594/2002 cut-off events. For 36557/36557 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16658 event pairs, 163 based on Foata normal form. 4/2005 useless extension candidates. Maximal degree in co-relation 12564. Up to 854 conditions per place. [2021-11-09 09:10:06,948 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 259 selfloop transitions, 101 changer transitions 7/403 dead transitions. [2021-11-09 09:10:06,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 403 transitions, 6597 flow [2021-11-09 09:10:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:10:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:10:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1335 transitions. [2021-11-09 09:10:06,952 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6339031339031339 [2021-11-09 09:10:06,952 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1335 transitions. [2021-11-09 09:10:06,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1335 transitions. [2021-11-09 09:10:06,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:06,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1335 transitions. [2021-11-09 09:10:06,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 49.44444444444444) internal successors, (1335), 27 states have internal predecessors, (1335), 0 states have call successors, (0), 0 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 09:10:06,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:10:06,959 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:10:06,959 INFO L186 Difference]: Start difference. First operand has 330 places, 342 transitions, 5171 flow. Second operand 27 states and 1335 transitions. [2021-11-09 09:10:06,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 403 transitions, 6597 flow [2021-11-09 09:10:07,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 403 transitions, 6377 flow, removed 56 selfloop flow, removed 13 redundant places. [2021-11-09 09:10:07,138 INFO L242 Difference]: Finished difference. Result has 347 places, 350 transitions, 5377 flow [2021-11-09 09:10:07,139 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5377, PETRI_PLACES=347, PETRI_TRANSITIONS=350} [2021-11-09 09:10:07,139 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 278 predicate places. [2021-11-09 09:10:07,139 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 350 transitions, 5377 flow [2021-11-09 09:10:07,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:07,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:07,140 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:07,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 09:10:07,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:10:07,362 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2021556747, now seen corresponding path program 24 times [2021-11-09 09:10:07,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:07,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174044203] [2021-11-09 09:10:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:07,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:07,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:07,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174044203] [2021-11-09 09:10:07,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174044203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:07,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594954933] [2021-11-09 09:10:07,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:10:07,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:07,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:07,604 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:07,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:10:08,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:10:08,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:09,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594954933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:09,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:09,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:09,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861192650] [2021-11-09 09:10:09,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:09,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:09,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:09,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:09,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:09,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 350 transitions, 5377 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:09,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:09,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:09,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:10,291 INFO L129 PetriNetUnfolder]: 614/2050 cut-off events. [2021-11-09 09:10:10,291 INFO L130 PetriNetUnfolder]: For 41567/41567 co-relation queries the response was YES. [2021-11-09 09:10:10,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13400 conditions, 2050 events. 614/2050 cut-off events. For 41567/41567 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17129 event pairs, 182 based on Foata normal form. 2/2051 useless extension candidates. Maximal degree in co-relation 13296. Up to 999 conditions per place. [2021-11-09 09:10:10,321 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 272 selfloop transitions, 91 changer transitions 4/403 dead transitions. [2021-11-09 09:10:10,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 403 transitions, 6942 flow [2021-11-09 09:10:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:10:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:10:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 986 transitions. [2021-11-09 09:10:10,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.632051282051282 [2021-11-09 09:10:10,323 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 986 transitions. [2021-11-09 09:10:10,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 986 transitions. [2021-11-09 09:10:10,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:10,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 986 transitions. [2021-11-09 09:10:10,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.3) internal successors, (986), 20 states have internal predecessors, (986), 0 states have call successors, (0), 0 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 09:10:10,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:10:10,326 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:10:10,326 INFO L186 Difference]: Start difference. First operand has 347 places, 350 transitions, 5377 flow. Second operand 20 states and 986 transitions. [2021-11-09 09:10:10,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 403 transitions, 6942 flow [2021-11-09 09:10:10,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 403 transitions, 6616 flow, removed 53 selfloop flow, removed 24 redundant places. [2021-11-09 09:10:10,512 INFO L242 Difference]: Finished difference. Result has 346 places, 368 transitions, 5702 flow [2021-11-09 09:10:10,513 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=5108, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5702, PETRI_PLACES=346, PETRI_TRANSITIONS=368} [2021-11-09 09:10:10,513 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 277 predicate places. [2021-11-09 09:10:10,513 INFO L470 AbstractCegarLoop]: Abstraction has has 346 places, 368 transitions, 5702 flow [2021-11-09 09:10:10,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:10,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:10,514 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:10,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:10,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:10:10,714 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1128556541, now seen corresponding path program 25 times [2021-11-09 09:10:10,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:10,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454443559] [2021-11-09 09:10:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:10,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:11,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:11,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454443559] [2021-11-09 09:10:11,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454443559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:11,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125503082] [2021-11-09 09:10:11,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:10:11,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:11,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:11,002 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:11,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:10:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:12,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:12,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125503082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:12,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:12,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:10:12,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325513931] [2021-11-09 09:10:12,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:10:12,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:10:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:10:12,666 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:12,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 368 transitions, 5702 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:12,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:12,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:12,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:13,523 INFO L129 PetriNetUnfolder]: 613/2052 cut-off events. [2021-11-09 09:10:13,523 INFO L130 PetriNetUnfolder]: For 39576/39576 co-relation queries the response was YES. [2021-11-09 09:10:13,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13199 conditions, 2052 events. 613/2052 cut-off events. For 39576/39576 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17230 event pairs, 186 based on Foata normal form. 1/2052 useless extension candidates. Maximal degree in co-relation 13093. Up to 1204 conditions per place. [2021-11-09 09:10:13,554 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 302 selfloop transitions, 77 changer transitions 4/419 dead transitions. [2021-11-09 09:10:13,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 419 transitions, 7008 flow [2021-11-09 09:10:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:10:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:10:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1080 transitions. [2021-11-09 09:10:13,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6293706293706294 [2021-11-09 09:10:13,556 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1080 transitions. [2021-11-09 09:10:13,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1080 transitions. [2021-11-09 09:10:13,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:13,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1080 transitions. [2021-11-09 09:10:13,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.09090909090909) internal successors, (1080), 22 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 09:10:13,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:10:13,561 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:10:13,561 INFO L186 Difference]: Start difference. First operand has 346 places, 368 transitions, 5702 flow. Second operand 22 states and 1080 transitions. [2021-11-09 09:10:13,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 419 transitions, 7008 flow [2021-11-09 09:10:13,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 419 transitions, 6892 flow, removed 35 selfloop flow, removed 7 redundant places. [2021-11-09 09:10:13,934 INFO L242 Difference]: Finished difference. Result has 366 places, 387 transitions, 6030 flow [2021-11-09 09:10:13,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=5607, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6030, PETRI_PLACES=366, PETRI_TRANSITIONS=387} [2021-11-09 09:10:13,935 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 297 predicate places. [2021-11-09 09:10:13,935 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 387 transitions, 6030 flow [2021-11-09 09:10:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:13,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:13,936 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:13,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:14,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:10:14,137 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash -422654393, now seen corresponding path program 26 times [2021-11-09 09:10:14,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:14,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395155425] [2021-11-09 09:10:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:14,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:14,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:14,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395155425] [2021-11-09 09:10:14,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395155425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:14,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440464781] [2021-11-09 09:10:14,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:10:14,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:14,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:14,365 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:14,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:10:15,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:10:15,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:15,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:10:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:16,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440464781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:16,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:16,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-11-09 09:10:16,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514082605] [2021-11-09 09:10:16,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:10:16,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:10:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:10:16,396 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:16,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 387 transitions, 6030 flow. Second operand has 26 states, 26 states have (on average 46.69230769230769) internal successors, (1214), 26 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 09:10:16,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:16,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:16,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:17,546 INFO L129 PetriNetUnfolder]: 613/2045 cut-off events. [2021-11-09 09:10:17,546 INFO L130 PetriNetUnfolder]: For 40000/40000 co-relation queries the response was YES. [2021-11-09 09:10:17,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13319 conditions, 2045 events. 613/2045 cut-off events. For 40000/40000 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17143 event pairs, 138 based on Foata normal form. 3/2046 useless extension candidates. Maximal degree in co-relation 13207. Up to 618 conditions per place. [2021-11-09 09:10:17,581 INFO L132 encePairwiseOnDemand]: 62/78 looper letters, 249 selfloop transitions, 129 changer transitions 13/427 dead transitions. [2021-11-09 09:10:17,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 427 transitions, 7378 flow [2021-11-09 09:10:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:10:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:10:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 933 transitions. [2021-11-09 09:10:17,592 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295546558704453 [2021-11-09 09:10:17,592 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 933 transitions. [2021-11-09 09:10:17,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 933 transitions. [2021-11-09 09:10:17,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:17,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 933 transitions. [2021-11-09 09:10:17,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 49.10526315789474) internal successors, (933), 19 states have internal predecessors, (933), 0 states have call successors, (0), 0 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 09:10:17,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:10:17,597 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:10:17,597 INFO L186 Difference]: Start difference. First operand has 366 places, 387 transitions, 6030 flow. Second operand 19 states and 933 transitions. [2021-11-09 09:10:17,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 427 transitions, 7378 flow [2021-11-09 09:10:17,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 427 transitions, 7245 flow, removed 17 selfloop flow, removed 14 redundant places. [2021-11-09 09:10:17,867 INFO L242 Difference]: Finished difference. Result has 371 places, 380 transitions, 6060 flow [2021-11-09 09:10:17,867 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=5908, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6060, PETRI_PLACES=371, PETRI_TRANSITIONS=380} [2021-11-09 09:10:17,868 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 302 predicate places. [2021-11-09 09:10:17,868 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 380 transitions, 6060 flow [2021-11-09 09:10:17,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 46.69230769230769) internal successors, (1214), 26 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 09:10:17,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:17,869 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:17,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:18,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:10:18,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1246886495, now seen corresponding path program 27 times [2021-11-09 09:10:18,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:18,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694602054] [2021-11-09 09:10:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:18,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:18,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:18,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694602054] [2021-11-09 09:10:18,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694602054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:18,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113106683] [2021-11-09 09:10:18,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:10:18,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:18,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:18,299 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:18,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:10:19,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:10:19,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:20,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113106683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:20,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:20,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:20,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271228330] [2021-11-09 09:10:20,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:20,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:20,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:20,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 380 transitions, 6060 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:20,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:20,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:20,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:21,320 INFO L129 PetriNetUnfolder]: 609/1949 cut-off events. [2021-11-09 09:10:21,320 INFO L130 PetriNetUnfolder]: For 41681/41681 co-relation queries the response was YES. [2021-11-09 09:10:21,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13234 conditions, 1949 events. 609/1949 cut-off events. For 41681/41681 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15849 event pairs, 162 based on Foata normal form. 8/1956 useless extension candidates. Maximal degree in co-relation 13121. Up to 850 conditions per place. [2021-11-09 09:10:21,350 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 265 selfloop transitions, 126 changer transitions 7/434 dead transitions. [2021-11-09 09:10:21,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 434 transitions, 7548 flow [2021-11-09 09:10:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:10:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 09:10:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1374 transitions. [2021-11-09 09:10:21,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6291208791208791 [2021-11-09 09:10:21,352 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1374 transitions. [2021-11-09 09:10:21,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1374 transitions. [2021-11-09 09:10:21,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:21,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1374 transitions. [2021-11-09 09:10:21,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 49.07142857142857) internal successors, (1374), 28 states have internal predecessors, (1374), 0 states have call successors, (0), 0 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 09:10:21,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:10:21,356 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:10:21,356 INFO L186 Difference]: Start difference. First operand has 371 places, 380 transitions, 6060 flow. Second operand 28 states and 1374 transitions. [2021-11-09 09:10:21,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 434 transitions, 7548 flow [2021-11-09 09:10:21,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 434 transitions, 7302 flow, removed 29 selfloop flow, removed 17 redundant places. [2021-11-09 09:10:21,554 INFO L242 Difference]: Finished difference. Result has 377 places, 390 transitions, 6333 flow [2021-11-09 09:10:21,555 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6333, PETRI_PLACES=377, PETRI_TRANSITIONS=390} [2021-11-09 09:10:21,555 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 308 predicate places. [2021-11-09 09:10:21,555 INFO L470 AbstractCegarLoop]: Abstraction has has 377 places, 390 transitions, 6333 flow [2021-11-09 09:10:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:21,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:21,556 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:21,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:21,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:21,756 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:21,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1011732645, now seen corresponding path program 28 times [2021-11-09 09:10:21,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:21,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337927147] [2021-11-09 09:10:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:21,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:22,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:22,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337927147] [2021-11-09 09:10:22,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337927147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:22,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105187101] [2021-11-09 09:10:22,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:10:22,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:22,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:22,005 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:22,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:10:23,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:10:23,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:23,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105187101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:23,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:23,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:23,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625785325] [2021-11-09 09:10:23,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:23,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:23,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:23,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 390 transitions, 6333 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:23,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:23,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:23,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:25,025 INFO L129 PetriNetUnfolder]: 613/1846 cut-off events. [2021-11-09 09:10:25,025 INFO L130 PetriNetUnfolder]: For 41689/41689 co-relation queries the response was YES. [2021-11-09 09:10:25,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13076 conditions, 1846 events. 613/1846 cut-off events. For 41689/41689 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14414 event pairs, 172 based on Foata normal form. 1/1845 useless extension candidates. Maximal degree in co-relation 12965. Up to 949 conditions per place. [2021-11-09 09:10:25,061 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 294 selfloop transitions, 115 changer transitions 4/449 dead transitions. [2021-11-09 09:10:25,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 449 transitions, 8041 flow [2021-11-09 09:10:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:10:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 09:10:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1373 transitions. [2021-11-09 09:10:25,062 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6286630036630036 [2021-11-09 09:10:25,062 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1373 transitions. [2021-11-09 09:10:25,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1373 transitions. [2021-11-09 09:10:25,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:25,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1373 transitions. [2021-11-09 09:10:25,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 49.035714285714285) internal successors, (1373), 28 states have internal predecessors, (1373), 0 states have call successors, (0), 0 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 09:10:25,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:10:25,069 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:10:25,069 INFO L186 Difference]: Start difference. First operand has 377 places, 390 transitions, 6333 flow. Second operand 28 states and 1373 transitions. [2021-11-09 09:10:25,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 449 transitions, 8041 flow [2021-11-09 09:10:25,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 449 transitions, 7723 flow, removed 43 selfloop flow, removed 24 redundant places. [2021-11-09 09:10:25,304 INFO L242 Difference]: Finished difference. Result has 381 places, 403 transitions, 6679 flow [2021-11-09 09:10:25,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6679, PETRI_PLACES=381, PETRI_TRANSITIONS=403} [2021-11-09 09:10:25,305 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 312 predicate places. [2021-11-09 09:10:25,305 INFO L470 AbstractCegarLoop]: Abstraction has has 381 places, 403 transitions, 6679 flow [2021-11-09 09:10:25,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:25,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:25,306 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:25,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:25,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:25,522 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash -706904027, now seen corresponding path program 29 times [2021-11-09 09:10:25,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:25,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796137530] [2021-11-09 09:10:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:25,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:25,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:25,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796137530] [2021-11-09 09:10:25,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796137530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:25,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109322074] [2021-11-09 09:10:25,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:10:25,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:25,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:25,794 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:25,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:10:27,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:10:27,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:28,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109322074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:28,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:28,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:10:28,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8301317] [2021-11-09 09:10:28,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:10:28,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:28,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:10:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:10:28,091 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:28,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 403 transitions, 6679 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:28,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:28,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:28,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:28,895 INFO L129 PetriNetUnfolder]: 621/1857 cut-off events. [2021-11-09 09:10:28,896 INFO L130 PetriNetUnfolder]: For 40936/40936 co-relation queries the response was YES. [2021-11-09 09:10:28,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13049 conditions, 1857 events. 621/1857 cut-off events. For 40936/40936 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14504 event pairs, 174 based on Foata normal form. 1/1856 useless extension candidates. Maximal degree in co-relation 12936. Up to 1142 conditions per place. [2021-11-09 09:10:28,925 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 331 selfloop transitions, 70 changer transitions 7/444 dead transitions. [2021-11-09 09:10:28,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 444 transitions, 8043 flow [2021-11-09 09:10:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:10:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:10:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 948 transitions. [2021-11-09 09:10:28,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6396761133603239 [2021-11-09 09:10:28,927 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 948 transitions. [2021-11-09 09:10:28,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 948 transitions. [2021-11-09 09:10:28,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:28,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 948 transitions. [2021-11-09 09:10:28,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 49.89473684210526) internal successors, (948), 19 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 09:10:28,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:10:28,934 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:10:28,934 INFO L186 Difference]: Start difference. First operand has 381 places, 403 transitions, 6679 flow. Second operand 19 states and 948 transitions. [2021-11-09 09:10:28,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 444 transitions, 8043 flow [2021-11-09 09:10:29,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 444 transitions, 7751 flow, removed 64 selfloop flow, removed 18 redundant places. [2021-11-09 09:10:29,178 INFO L242 Difference]: Finished difference. Result has 383 places, 405 transitions, 6654 flow [2021-11-09 09:10:29,179 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6654, PETRI_PLACES=383, PETRI_TRANSITIONS=405} [2021-11-09 09:10:29,179 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 314 predicate places. [2021-11-09 09:10:29,179 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 405 transitions, 6654 flow [2021-11-09 09:10:29,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:29,180 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:29,180 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:29,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:29,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:29,386 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2059768713, now seen corresponding path program 30 times [2021-11-09 09:10:29,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:29,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699590247] [2021-11-09 09:10:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:29,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:29,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:29,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699590247] [2021-11-09 09:10:29,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699590247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:29,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121018135] [2021-11-09 09:10:29,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:10:29,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:29,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:29,662 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:29,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:10:31,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 09:10:31,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:31,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121018135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:31,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:31,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:10:31,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049045974] [2021-11-09 09:10:31,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:10:31,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:10:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:10:31,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:31,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 405 transitions, 6654 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:31,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:31,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:31,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:32,601 INFO L129 PetriNetUnfolder]: 617/1852 cut-off events. [2021-11-09 09:10:32,601 INFO L130 PetriNetUnfolder]: For 40979/40979 co-relation queries the response was YES. [2021-11-09 09:10:32,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 1852 events. 617/1852 cut-off events. For 40979/40979 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14458 event pairs, 179 based on Foata normal form. 2/1852 useless extension candidates. Maximal degree in co-relation 12816. Up to 1029 conditions per place. [2021-11-09 09:10:32,632 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 331 selfloop transitions, 76 changer transitions 6/449 dead transitions. [2021-11-09 09:10:32,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 449 transitions, 7969 flow [2021-11-09 09:10:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:10:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:10:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 855 transitions. [2021-11-09 09:10:32,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6447963800904978 [2021-11-09 09:10:32,634 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 855 transitions. [2021-11-09 09:10:32,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 855 transitions. [2021-11-09 09:10:32,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:32,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 855 transitions. [2021-11-09 09:10:32,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 50.294117647058826) internal successors, (855), 17 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:10:32,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:10:32,638 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:10:32,638 INFO L186 Difference]: Start difference. First operand has 383 places, 405 transitions, 6654 flow. Second operand 17 states and 855 transitions. [2021-11-09 09:10:32,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 449 transitions, 7969 flow [2021-11-09 09:10:32,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 449 transitions, 7856 flow, removed 15 selfloop flow, removed 13 redundant places. [2021-11-09 09:10:32,878 INFO L242 Difference]: Finished difference. Result has 387 places, 406 transitions, 6779 flow [2021-11-09 09:10:32,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=6561, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6779, PETRI_PLACES=387, PETRI_TRANSITIONS=406} [2021-11-09 09:10:32,879 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 318 predicate places. [2021-11-09 09:10:32,880 INFO L470 AbstractCegarLoop]: Abstraction has has 387 places, 406 transitions, 6779 flow [2021-11-09 09:10:32,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:32,880 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:32,880 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:32,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-09 09:10:33,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:10:33,106 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2090944059, now seen corresponding path program 31 times [2021-11-09 09:10:33,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:33,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907977689] [2021-11-09 09:10:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:33,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:33,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:33,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907977689] [2021-11-09 09:10:33,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907977689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:33,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507750645] [2021-11-09 09:10:33,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:10:33,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:33,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:33,377 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:33,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:10:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:34,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:34,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:35,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507750645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:35,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:35,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:10:35,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503416982] [2021-11-09 09:10:35,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:10:35,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:35,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:10:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:10:35,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:35,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 406 transitions, 6779 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:35,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:35,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:35,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:36,231 INFO L129 PetriNetUnfolder]: 617/1827 cut-off events. [2021-11-09 09:10:36,231 INFO L130 PetriNetUnfolder]: For 42999/42999 co-relation queries the response was YES. [2021-11-09 09:10:36,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12978 conditions, 1827 events. 617/1827 cut-off events. For 42999/42999 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14119 event pairs, 166 based on Foata normal form. 2/1828 useless extension candidates. Maximal degree in co-relation 12863. Up to 1075 conditions per place. [2021-11-09 09:10:36,278 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 326 selfloop transitions, 83 changer transitions 9/454 dead transitions. [2021-11-09 09:10:36,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 454 transitions, 8220 flow [2021-11-09 09:10:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:10:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:10:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 995 transitions. [2021-11-09 09:10:36,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2021-11-09 09:10:36,281 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 995 transitions. [2021-11-09 09:10:36,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 995 transitions. [2021-11-09 09:10:36,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:36,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 995 transitions. [2021-11-09 09:10:36,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.75) internal successors, (995), 20 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 09:10:36,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:10:36,285 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:10:36,286 INFO L186 Difference]: Start difference. First operand has 387 places, 406 transitions, 6779 flow. Second operand 20 states and 995 transitions. [2021-11-09 09:10:36,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 454 transitions, 8220 flow [2021-11-09 09:10:36,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 454 transitions, 7987 flow, removed 31 selfloop flow, removed 15 redundant places. [2021-11-09 09:10:36,538 INFO L242 Difference]: Finished difference. Result has 394 places, 408 transitions, 6801 flow [2021-11-09 09:10:36,538 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=6578, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6801, PETRI_PLACES=394, PETRI_TRANSITIONS=408} [2021-11-09 09:10:36,539 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 325 predicate places. [2021-11-09 09:10:36,539 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 408 transitions, 6801 flow [2021-11-09 09:10:36,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:36,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:36,539 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:36,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:36,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:36,740 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1179978113, now seen corresponding path program 32 times [2021-11-09 09:10:36,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:36,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18618516] [2021-11-09 09:10:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:36,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:36,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:36,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18618516] [2021-11-09 09:10:36,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18618516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:36,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279679981] [2021-11-09 09:10:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:10:36,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:36,947 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:10:38,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:10:38,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:38,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279679981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:38,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:38,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:38,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150362580] [2021-11-09 09:10:38,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:38,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:38,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:38,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:38,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 408 transitions, 6801 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:38,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:38,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:38,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:40,159 INFO L129 PetriNetUnfolder]: 613/1788 cut-off events. [2021-11-09 09:10:40,159 INFO L130 PetriNetUnfolder]: For 42042/42042 co-relation queries the response was YES. [2021-11-09 09:10:40,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 1788 events. 613/1788 cut-off events. For 42042/42042 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13728 event pairs, 163 based on Foata normal form. 1/1788 useless extension candidates. Maximal degree in co-relation 12748. Up to 951 conditions per place. [2021-11-09 09:10:40,186 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 296 selfloop transitions, 110 changer transitions 7/449 dead transitions. [2021-11-09 09:10:40,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 449 transitions, 8116 flow [2021-11-09 09:10:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:10:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 09:10:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1184 transitions. [2021-11-09 09:10:40,187 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2021-11-09 09:10:40,188 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1184 transitions. [2021-11-09 09:10:40,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1184 transitions. [2021-11-09 09:10:40,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:40,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1184 transitions. [2021-11-09 09:10:40,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 49.333333333333336) internal successors, (1184), 24 states have internal predecessors, (1184), 0 states have call successors, (0), 0 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 09:10:40,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:10:40,191 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:10:40,191 INFO L186 Difference]: Start difference. First operand has 394 places, 408 transitions, 6801 flow. Second operand 24 states and 1184 transitions. [2021-11-09 09:10:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 449 transitions, 8116 flow [2021-11-09 09:10:40,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 449 transitions, 7911 flow, removed 20 selfloop flow, removed 19 redundant places. [2021-11-09 09:10:40,393 INFO L242 Difference]: Finished difference. Result has 397 places, 406 transitions, 6821 flow [2021-11-09 09:10:40,394 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6821, PETRI_PLACES=397, PETRI_TRANSITIONS=406} [2021-11-09 09:10:40,394 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 328 predicate places. [2021-11-09 09:10:40,394 INFO L470 AbstractCegarLoop]: Abstraction has has 397 places, 406 transitions, 6821 flow [2021-11-09 09:10:40,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:40,395 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:40,395 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:40,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:40,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:40,610 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:40,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1303480057, now seen corresponding path program 33 times [2021-11-09 09:10:40,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:40,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209004909] [2021-11-09 09:10:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:40,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:40,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:40,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209004909] [2021-11-09 09:10:40,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209004909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:40,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719036971] [2021-11-09 09:10:40,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:10:40,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:40,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:40,860 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:40,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:10:42,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:10:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:42,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:42,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719036971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:42,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:42,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:10:42,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544484532] [2021-11-09 09:10:42,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:10:42,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:10:42,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:10:42,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:42,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 406 transitions, 6821 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:42,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:42,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:42,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:43,828 INFO L129 PetriNetUnfolder]: 611/1769 cut-off events. [2021-11-09 09:10:43,828 INFO L130 PetriNetUnfolder]: For 40835/40835 co-relation queries the response was YES. [2021-11-09 09:10:43,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12723 conditions, 1769 events. 611/1769 cut-off events. For 40835/40835 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13513 event pairs, 164 based on Foata normal form. 2/1769 useless extension candidates. Maximal degree in co-relation 12608. Up to 1020 conditions per place. [2021-11-09 09:10:43,873 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 310 selfloop transitions, 87 changer transitions 5/438 dead transitions. [2021-11-09 09:10:43,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 438 transitions, 7988 flow [2021-11-09 09:10:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:10:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 09:10:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 894 transitions. [2021-11-09 09:10:43,875 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2021-11-09 09:10:43,875 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 894 transitions. [2021-11-09 09:10:43,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 894 transitions. [2021-11-09 09:10:43,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:43,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 894 transitions. [2021-11-09 09:10:43,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 49.666666666666664) internal successors, (894), 18 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 09:10:43,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:10:43,879 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:10:43,879 INFO L186 Difference]: Start difference. First operand has 397 places, 406 transitions, 6821 flow. Second operand 18 states and 894 transitions. [2021-11-09 09:10:43,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 438 transitions, 7988 flow [2021-11-09 09:10:44,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 438 transitions, 7759 flow, removed 5 selfloop flow, removed 21 redundant places. [2021-11-09 09:10:44,234 INFO L242 Difference]: Finished difference. Result has 391 places, 410 transitions, 6889 flow [2021-11-09 09:10:44,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6889, PETRI_PLACES=391, PETRI_TRANSITIONS=410} [2021-11-09 09:10:44,235 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 322 predicate places. [2021-11-09 09:10:44,235 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 410 transitions, 6889 flow [2021-11-09 09:10:44,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:10:44,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:44,236 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:44,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:44,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:10:44,438 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash 948846527, now seen corresponding path program 34 times [2021-11-09 09:10:44,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:44,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174132785] [2021-11-09 09:10:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:44,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:44,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:44,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174132785] [2021-11-09 09:10:44,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174132785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:44,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470839499] [2021-11-09 09:10:44,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:10:44,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:44,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:44,701 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:44,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:10:46,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:10:46,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:46,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470839499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:46,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:46,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:46,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776239040] [2021-11-09 09:10:46,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:46,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:46,872 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:46,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 410 transitions, 6889 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:46,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:46,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:46,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:47,803 INFO L129 PetriNetUnfolder]: 622/1772 cut-off events. [2021-11-09 09:10:47,803 INFO L130 PetriNetUnfolder]: For 42884/42884 co-relation queries the response was YES. [2021-11-09 09:10:47,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12995 conditions, 1772 events. 622/1772 cut-off events. For 42884/42884 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13434 event pairs, 170 based on Foata normal form. 1/1772 useless extension candidates. Maximal degree in co-relation 12879. Up to 1043 conditions per place. [2021-11-09 09:10:47,837 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 330 selfloop transitions, 93 changer transitions 4/463 dead transitions. [2021-11-09 09:10:47,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 463 transitions, 8453 flow [2021-11-09 09:10:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:10:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:10:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 939 transitions. [2021-11-09 09:10:47,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6336032388663968 [2021-11-09 09:10:47,839 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 939 transitions. [2021-11-09 09:10:47,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 939 transitions. [2021-11-09 09:10:47,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:47,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 939 transitions. [2021-11-09 09:10:47,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 49.421052631578945) internal successors, (939), 19 states have internal predecessors, (939), 0 states have call successors, (0), 0 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 09:10:47,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:10:47,844 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:10:47,844 INFO L186 Difference]: Start difference. First operand has 391 places, 410 transitions, 6889 flow. Second operand 19 states and 939 transitions. [2021-11-09 09:10:47,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 463 transitions, 8453 flow [2021-11-09 09:10:48,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 463 transitions, 8233 flow, removed 23 selfloop flow, removed 17 redundant places. [2021-11-09 09:10:48,068 INFO L242 Difference]: Finished difference. Result has 395 places, 430 transitions, 7304 flow [2021-11-09 09:10:48,069 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7304, PETRI_PLACES=395, PETRI_TRANSITIONS=430} [2021-11-09 09:10:48,069 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 326 predicate places. [2021-11-09 09:10:48,069 INFO L470 AbstractCegarLoop]: Abstraction has has 395 places, 430 transitions, 7304 flow [2021-11-09 09:10:48,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:48,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:48,070 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:48,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:10:48,275 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash -279147671, now seen corresponding path program 35 times [2021-11-09 09:10:48,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:48,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841005999] [2021-11-09 09:10:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:48,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:48,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841005999] [2021-11-09 09:10:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841005999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953881916] [2021-11-09 09:10:48,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:10:48,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:48,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:48,562 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:48,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:10:50,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 09:10:50,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:50,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:50,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953881916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:50,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:50,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:50,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311387813] [2021-11-09 09:10:50,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:50,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:50,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:50,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 430 transitions, 7304 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:50,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:50,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:50,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:52,058 INFO L129 PetriNetUnfolder]: 630/1812 cut-off events. [2021-11-09 09:10:52,058 INFO L130 PetriNetUnfolder]: For 43877/43877 co-relation queries the response was YES. [2021-11-09 09:10:52,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13235 conditions, 1812 events. 630/1812 cut-off events. For 43877/43877 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 13902 event pairs, 169 based on Foata normal form. 1/1812 useless extension candidates. Maximal degree in co-relation 13116. Up to 1057 conditions per place. [2021-11-09 09:10:52,088 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 317 selfloop transitions, 120 changer transitions 4/477 dead transitions. [2021-11-09 09:10:52,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 477 transitions, 8782 flow [2021-11-09 09:10:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:10:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-09 09:10:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1233 transitions. [2021-11-09 09:10:52,091 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6323076923076923 [2021-11-09 09:10:52,091 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1233 transitions. [2021-11-09 09:10:52,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1233 transitions. [2021-11-09 09:10:52,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:52,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1233 transitions. [2021-11-09 09:10:52,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 49.32) internal successors, (1233), 25 states have internal predecessors, (1233), 0 states have call successors, (0), 0 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 09:10:52,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 78.0) internal successors, (2028), 26 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 09:10:52,097 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 78.0) internal successors, (2028), 26 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 09:10:52,097 INFO L186 Difference]: Start difference. First operand has 395 places, 430 transitions, 7304 flow. Second operand 25 states and 1233 transitions. [2021-11-09 09:10:52,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 477 transitions, 8782 flow [2021-11-09 09:10:52,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 477 transitions, 8531 flow, removed 40 selfloop flow, removed 15 redundant places. [2021-11-09 09:10:52,337 INFO L242 Difference]: Finished difference. Result has 406 places, 436 transitions, 7506 flow [2021-11-09 09:10:52,338 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=7069, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7506, PETRI_PLACES=406, PETRI_TRANSITIONS=436} [2021-11-09 09:10:52,338 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 337 predicate places. [2021-11-09 09:10:52,338 INFO L470 AbstractCegarLoop]: Abstraction has has 406 places, 436 transitions, 7506 flow [2021-11-09 09:10:52,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:52,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:52,338 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:52,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:52,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:10:52,539 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1731039833, now seen corresponding path program 36 times [2021-11-09 09:10:52,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:52,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212927291] [2021-11-09 09:10:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:52,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:52,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:52,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212927291] [2021-11-09 09:10:52,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212927291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:52,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675454326] [2021-11-09 09:10:52,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:10:52,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:52,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:52,823 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:52,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:10:54,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:10:54,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:10:54,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:10:54,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:55,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675454326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:55,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:55,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-11-09 09:10:55,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859385252] [2021-11-09 09:10:55,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:10:55,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:10:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:10:55,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:55,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 436 transitions, 7506 flow. Second operand has 26 states, 26 states have (on average 46.69230769230769) internal successors, (1214), 26 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 09:10:55,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:55,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:55,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:10:56,486 INFO L129 PetriNetUnfolder]: 627/1829 cut-off events. [2021-11-09 09:10:56,487 INFO L130 PetriNetUnfolder]: For 45841/45841 co-relation queries the response was YES. [2021-11-09 09:10:56,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13410 conditions, 1829 events. 627/1829 cut-off events. For 45841/45841 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14114 event pairs, 113 based on Foata normal form. 3/1829 useless extension candidates. Maximal degree in co-relation 13288. Up to 747 conditions per place. [2021-11-09 09:10:56,520 INFO L132 encePairwiseOnDemand]: 62/78 looper letters, 247 selfloop transitions, 221 changer transitions 4/508 dead transitions. [2021-11-09 09:10:56,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 508 transitions, 9656 flow [2021-11-09 09:10:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:10:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:10:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1317 transitions. [2021-11-09 09:10:56,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6253561253561254 [2021-11-09 09:10:56,522 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1317 transitions. [2021-11-09 09:10:56,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1317 transitions. [2021-11-09 09:10:56,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:10:56,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1317 transitions. [2021-11-09 09:10:56,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 48.77777777777778) internal successors, (1317), 27 states have internal predecessors, (1317), 0 states have call successors, (0), 0 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 09:10:56,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:10:56,527 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:10:56,527 INFO L186 Difference]: Start difference. First operand has 406 places, 436 transitions, 7506 flow. Second operand 27 states and 1317 transitions. [2021-11-09 09:10:56,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 508 transitions, 9656 flow [2021-11-09 09:10:56,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 508 transitions, 9385 flow, removed 45 selfloop flow, removed 18 redundant places. [2021-11-09 09:10:56,779 INFO L242 Difference]: Finished difference. Result has 417 places, 455 transitions, 8349 flow [2021-11-09 09:10:56,779 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=7252, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8349, PETRI_PLACES=417, PETRI_TRANSITIONS=455} [2021-11-09 09:10:56,779 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 348 predicate places. [2021-11-09 09:10:56,780 INFO L470 AbstractCegarLoop]: Abstraction has has 417 places, 455 transitions, 8349 flow [2021-11-09 09:10:56,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 46.69230769230769) internal successors, (1214), 26 states have internal predecessors, (1214), 0 states have call successors, (0), 0 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 09:10:56,780 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:10:56,780 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:56,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:56,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:10:56,981 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:10:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2132190713, now seen corresponding path program 37 times [2021-11-09 09:10:56,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:56,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364182497] [2021-11-09 09:10:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:56,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:57,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:57,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364182497] [2021-11-09 09:10:57,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364182497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:57,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148821937] [2021-11-09 09:10:57,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:10:57,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:57,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:57,235 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:57,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:10:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:10:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:10:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:10:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:10:59,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148821937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:59,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:10:59,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:10:59,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138955705] [2021-11-09 09:10:59,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:10:59,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:10:59,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:10:59,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:10:59,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 455 transitions, 8349 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:10:59,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:10:59,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:10:59,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:00,467 INFO L129 PetriNetUnfolder]: 627/1795 cut-off events. [2021-11-09 09:11:00,468 INFO L130 PetriNetUnfolder]: For 48267/48267 co-relation queries the response was YES. [2021-11-09 09:11:00,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13669 conditions, 1795 events. 627/1795 cut-off events. For 48267/48267 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 13799 event pairs, 151 based on Foata normal form. 2/1796 useless extension candidates. Maximal degree in co-relation 13544. Up to 1055 conditions per place. [2021-11-09 09:11:00,519 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 326 selfloop transitions, 115 changer transitions 9/486 dead transitions. [2021-11-09 09:11:00,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 486 transitions, 9618 flow [2021-11-09 09:11:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:11:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:11:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 992 transitions. [2021-11-09 09:11:00,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6358974358974359 [2021-11-09 09:11:00,522 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 992 transitions. [2021-11-09 09:11:00,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 992 transitions. [2021-11-09 09:11:00,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:00,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 992 transitions. [2021-11-09 09:11:00,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.6) internal successors, (992), 20 states have internal predecessors, (992), 0 states have call successors, (0), 0 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 09:11:00,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:00,526 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:00,527 INFO L186 Difference]: Start difference. First operand has 417 places, 455 transitions, 8349 flow. Second operand 20 states and 992 transitions. [2021-11-09 09:11:00,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 486 transitions, 9618 flow [2021-11-09 09:11:00,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 486 transitions, 9074 flow, removed 181 selfloop flow, removed 17 redundant places. [2021-11-09 09:11:00,950 INFO L242 Difference]: Finished difference. Result has 420 places, 452 transitions, 8077 flow [2021-11-09 09:11:00,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=7841, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8077, PETRI_PLACES=420, PETRI_TRANSITIONS=452} [2021-11-09 09:11:00,951 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 351 predicate places. [2021-11-09 09:11:00,951 INFO L470 AbstractCegarLoop]: Abstraction has has 420 places, 452 transitions, 8077 flow [2021-11-09 09:11:00,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:00,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:00,952 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:00,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:01,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:11:01,178 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:01,179 INFO L85 PathProgramCache]: Analyzing trace with hash 111889955, now seen corresponding path program 38 times [2021-11-09 09:11:01,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:01,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131686035] [2021-11-09 09:11:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:01,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:01,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:01,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131686035] [2021-11-09 09:11:01,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131686035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:01,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540360559] [2021-11-09 09:11:01,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:11:01,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:01,460 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:01,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:11:03,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:11:03,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:03,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:03,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540360559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:03,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:03,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:11:03,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019704394] [2021-11-09 09:11:03,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:03,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:03,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:11:03,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:03,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 452 transitions, 8077 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:03,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:03,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:03,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:04,855 INFO L129 PetriNetUnfolder]: 637/1808 cut-off events. [2021-11-09 09:11:04,855 INFO L130 PetriNetUnfolder]: For 42599/42599 co-relation queries the response was YES. [2021-11-09 09:11:04,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13342 conditions, 1808 events. 637/1808 cut-off events. For 42599/42599 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13870 event pairs, 173 based on Foata normal form. 1/1807 useless extension candidates. Maximal degree in co-relation 13218. Up to 1219 conditions per place. [2021-11-09 09:11:04,886 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 429 selfloop transitions, 40 changer transitions 7/512 dead transitions. [2021-11-09 09:11:04,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 512 transitions, 9734 flow [2021-11-09 09:11:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:11:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:11:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 949 transitions. [2021-11-09 09:11:04,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6403508771929824 [2021-11-09 09:11:04,887 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 949 transitions. [2021-11-09 09:11:04,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 949 transitions. [2021-11-09 09:11:04,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:04,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 949 transitions. [2021-11-09 09:11:04,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 49.94736842105263) internal successors, (949), 19 states have internal predecessors, (949), 0 states have call successors, (0), 0 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 09:11:04,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:11:04,890 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:11:04,890 INFO L186 Difference]: Start difference. First operand has 420 places, 452 transitions, 8077 flow. Second operand 19 states and 949 transitions. [2021-11-09 09:11:04,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 512 transitions, 9734 flow [2021-11-09 09:11:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 512 transitions, 9464 flow, removed 22 selfloop flow, removed 18 redundant places. [2021-11-09 09:11:05,155 INFO L242 Difference]: Finished difference. Result has 421 places, 460 transitions, 8097 flow [2021-11-09 09:11:05,156 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=7827, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8097, PETRI_PLACES=421, PETRI_TRANSITIONS=460} [2021-11-09 09:11:05,156 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 352 predicate places. [2021-11-09 09:11:05,157 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 460 transitions, 8097 flow [2021-11-09 09:11:05,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:05,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:05,157 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:05,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:05,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:05,369 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:05,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1492318701, now seen corresponding path program 39 times [2021-11-09 09:11:05,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:05,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740370973] [2021-11-09 09:11:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:05,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:05,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:05,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740370973] [2021-11-09 09:11:05,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740370973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:05,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353177822] [2021-11-09 09:11:05,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:11:05,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:05,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:05,600 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:05,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:11:07,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:11:07,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:07,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:07,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353177822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:07,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:07,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:11:07,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158282050] [2021-11-09 09:11:07,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:07,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:07,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:11:07,902 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:07,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 460 transitions, 8097 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:07,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:07,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:07,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:08,904 INFO L129 PetriNetUnfolder]: 736/2161 cut-off events. [2021-11-09 09:11:08,904 INFO L130 PetriNetUnfolder]: For 47574/47574 co-relation queries the response was YES. [2021-11-09 09:11:08,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15375 conditions, 2161 events. 736/2161 cut-off events. For 47574/47574 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17464 event pairs, 188 based on Foata normal form. 4/2162 useless extension candidates. Maximal degree in co-relation 15251. Up to 1303 conditions per place. [2021-11-09 09:11:08,946 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 459 selfloop transitions, 55 changer transitions 7/557 dead transitions. [2021-11-09 09:11:08,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 557 transitions, 10684 flow [2021-11-09 09:11:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:11:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:11:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 856 transitions. [2021-11-09 09:11:08,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6455505279034691 [2021-11-09 09:11:08,948 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 856 transitions. [2021-11-09 09:11:08,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 856 transitions. [2021-11-09 09:11:08,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:08,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 856 transitions. [2021-11-09 09:11:08,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 50.35294117647059) internal successors, (856), 17 states have internal predecessors, (856), 0 states have call successors, (0), 0 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 09:11:08,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:11:08,950 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:11:08,950 INFO L186 Difference]: Start difference. First operand has 421 places, 460 transitions, 8097 flow. Second operand 17 states and 856 transitions. [2021-11-09 09:11:08,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 557 transitions, 10684 flow [2021-11-09 09:11:09,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 557 transitions, 10534 flow, removed 27 selfloop flow, removed 14 redundant places. [2021-11-09 09:11:09,392 INFO L242 Difference]: Finished difference. Result has 431 places, 496 transitions, 9116 flow [2021-11-09 09:11:09,393 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=8007, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9116, PETRI_PLACES=431, PETRI_TRANSITIONS=496} [2021-11-09 09:11:09,394 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 362 predicate places. [2021-11-09 09:11:09,394 INFO L470 AbstractCegarLoop]: Abstraction has has 431 places, 496 transitions, 9116 flow [2021-11-09 09:11:09,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:09,394 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:09,395 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:09,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:09,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 09:11:09,610 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1070863121, now seen corresponding path program 40 times [2021-11-09 09:11:09,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:09,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28759942] [2021-11-09 09:11:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:09,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:09,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:09,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28759942] [2021-11-09 09:11:09,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28759942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:09,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243818570] [2021-11-09 09:11:09,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:11:09,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:09,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:09,900 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:09,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:11:11,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:11:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:12,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243818570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:12,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:12,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:11:12,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861520955] [2021-11-09 09:11:12,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:12,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:12,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:12,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:11:12,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:12,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 496 transitions, 9116 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:12,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:12,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:12,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:13,450 INFO L129 PetriNetUnfolder]: 734/2154 cut-off events. [2021-11-09 09:11:13,451 INFO L130 PetriNetUnfolder]: For 49341/49341 co-relation queries the response was YES. [2021-11-09 09:11:13,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15529 conditions, 2154 events. 734/2154 cut-off events. For 49341/49341 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17374 event pairs, 195 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 15397. Up to 1280 conditions per place. [2021-11-09 09:11:13,486 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 448 selfloop transitions, 60 changer transitions 7/551 dead transitions. [2021-11-09 09:11:13,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 551 transitions, 10821 flow [2021-11-09 09:11:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:11:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:11:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 856 transitions. [2021-11-09 09:11:13,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6455505279034691 [2021-11-09 09:11:13,488 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 856 transitions. [2021-11-09 09:11:13,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 856 transitions. [2021-11-09 09:11:13,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:13,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 856 transitions. [2021-11-09 09:11:13,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 50.35294117647059) internal successors, (856), 17 states have internal predecessors, (856), 0 states have call successors, (0), 0 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 09:11:13,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:11:13,490 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:11:13,490 INFO L186 Difference]: Start difference. First operand has 431 places, 496 transitions, 9116 flow. Second operand 17 states and 856 transitions. [2021-11-09 09:11:13,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 551 transitions, 10821 flow [2021-11-09 09:11:13,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 551 transitions, 10682 flow, removed 50 selfloop flow, removed 7 redundant places. [2021-11-09 09:11:13,773 INFO L242 Difference]: Finished difference. Result has 442 places, 498 transitions, 9207 flow [2021-11-09 09:11:13,774 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=9015, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9207, PETRI_PLACES=442, PETRI_TRANSITIONS=498} [2021-11-09 09:11:13,774 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 373 predicate places. [2021-11-09 09:11:13,774 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 498 transitions, 9207 flow [2021-11-09 09:11:13,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:13,775 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:13,775 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:13,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:13,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:13,975 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1402450601, now seen corresponding path program 41 times [2021-11-09 09:11:13,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:13,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242836594] [2021-11-09 09:11:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:13,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:14,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:14,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242836594] [2021-11-09 09:11:14,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242836594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:14,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766657871] [2021-11-09 09:11:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:11:14,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:14,204 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:14,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:11:16,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:11:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766657871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:16,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:16,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:11:16,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048623997] [2021-11-09 09:11:16,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:16,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:11:16,609 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:16,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 498 transitions, 9207 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:16,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:16,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:16,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:17,699 INFO L129 PetriNetUnfolder]: 734/2124 cut-off events. [2021-11-09 09:11:17,699 INFO L130 PetriNetUnfolder]: For 49734/49734 co-relation queries the response was YES. [2021-11-09 09:11:17,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15455 conditions, 2124 events. 734/2124 cut-off events. For 49734/49734 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17043 event pairs, 188 based on Foata normal form. 4/2125 useless extension candidates. Maximal degree in co-relation 15321. Up to 1280 conditions per place. [2021-11-09 09:11:17,736 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 441 selfloop transitions, 67 changer transitions 7/551 dead transitions. [2021-11-09 09:11:17,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 551 transitions, 10899 flow [2021-11-09 09:11:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:11:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 09:11:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 900 transitions. [2021-11-09 09:11:17,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2021-11-09 09:11:17,737 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 900 transitions. [2021-11-09 09:11:17,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 900 transitions. [2021-11-09 09:11:17,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:17,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 900 transitions. [2021-11-09 09:11:17,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 50.0) internal successors, (900), 18 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 09:11:17,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:11:17,739 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:11:17,739 INFO L186 Difference]: Start difference. First operand has 442 places, 498 transitions, 9207 flow. Second operand 18 states and 900 transitions. [2021-11-09 09:11:17,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 551 transitions, 10899 flow [2021-11-09 09:11:18,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 551 transitions, 10702 flow, removed 34 selfloop flow, removed 13 redundant places. [2021-11-09 09:11:18,031 INFO L242 Difference]: Finished difference. Result has 448 places, 505 transitions, 9375 flow [2021-11-09 09:11:18,031 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9375, PETRI_PLACES=448, PETRI_TRANSITIONS=505} [2021-11-09 09:11:18,031 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 379 predicate places. [2021-11-09 09:11:18,031 INFO L470 AbstractCegarLoop]: Abstraction has has 448 places, 505 transitions, 9375 flow [2021-11-09 09:11:18,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:18,032 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:18,032 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:18,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:18,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:18,233 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash -106589127, now seen corresponding path program 42 times [2021-11-09 09:11:18,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:18,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835765153] [2021-11-09 09:11:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:18,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:18,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:18,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835765153] [2021-11-09 09:11:18,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835765153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:18,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497564913] [2021-11-09 09:11:18,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:11:18,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:18,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:18,448 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:18,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:11:20,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:11:20,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:20,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:20,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497564913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:20,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:20,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:11:20,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192926004] [2021-11-09 09:11:20,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:20,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:11:20,883 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:20,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 505 transitions, 9375 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:20,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:20,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:20,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:21,963 INFO L129 PetriNetUnfolder]: 726/2035 cut-off events. [2021-11-09 09:11:21,963 INFO L130 PetriNetUnfolder]: For 49075/49075 co-relation queries the response was YES. [2021-11-09 09:11:22,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15206 conditions, 2035 events. 726/2035 cut-off events. For 49075/49075 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16025 event pairs, 188 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 15070. Up to 1283 conditions per place. [2021-11-09 09:11:22,017 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 459 selfloop transitions, 68 changer transitions 5/568 dead transitions. [2021-11-09 09:11:22,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 568 transitions, 11206 flow [2021-11-09 09:11:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:11:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 09:11:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 900 transitions. [2021-11-09 09:11:22,020 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2021-11-09 09:11:22,020 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 900 transitions. [2021-11-09 09:11:22,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 900 transitions. [2021-11-09 09:11:22,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:22,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 900 transitions. [2021-11-09 09:11:22,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 50.0) internal successors, (900), 18 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 09:11:22,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:11:22,024 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:11:22,025 INFO L186 Difference]: Start difference. First operand has 448 places, 505 transitions, 9375 flow. Second operand 18 states and 900 transitions. [2021-11-09 09:11:22,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 568 transitions, 11206 flow [2021-11-09 09:11:22,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 568 transitions, 10972 flow, removed 62 selfloop flow, removed 15 redundant places. [2021-11-09 09:11:22,350 INFO L242 Difference]: Finished difference. Result has 451 places, 516 transitions, 9589 flow [2021-11-09 09:11:22,351 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=9205, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9589, PETRI_PLACES=451, PETRI_TRANSITIONS=516} [2021-11-09 09:11:22,351 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 382 predicate places. [2021-11-09 09:11:22,351 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 516 transitions, 9589 flow [2021-11-09 09:11:22,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:22,352 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:22,352 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:22,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:22,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 09:11:22,552 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1965492065, now seen corresponding path program 43 times [2021-11-09 09:11:22,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:22,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198532744] [2021-11-09 09:11:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:22,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198532744] [2021-11-09 09:11:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198532744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192052926] [2021-11-09 09:11:22,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:11:22,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:22,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:22,800 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:22,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:11:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:24,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:24,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:25,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192052926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:25,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:25,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:11:25,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552947190] [2021-11-09 09:11:25,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:25,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:25,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:11:25,310 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:25,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 516 transitions, 9589 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:25,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:25,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:25,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:26,281 INFO L129 PetriNetUnfolder]: 722/1966 cut-off events. [2021-11-09 09:11:26,282 INFO L130 PetriNetUnfolder]: For 48415/48415 co-relation queries the response was YES. [2021-11-09 09:11:26,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15005 conditions, 1966 events. 722/1966 cut-off events. For 48415/48415 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15155 event pairs, 184 based on Foata normal form. 2/1965 useless extension candidates. Maximal degree in co-relation 14868. Up to 1307 conditions per place. [2021-11-09 09:11:26,317 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 462 selfloop transitions, 63 changer transitions 7/568 dead transitions. [2021-11-09 09:11:26,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 568 transitions, 11242 flow [2021-11-09 09:11:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:11:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:11:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 991 transitions. [2021-11-09 09:11:26,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6352564102564102 [2021-11-09 09:11:26,318 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 991 transitions. [2021-11-09 09:11:26,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 991 transitions. [2021-11-09 09:11:26,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:26,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 991 transitions. [2021-11-09 09:11:26,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.55) internal successors, (991), 20 states have internal predecessors, (991), 0 states have call successors, (0), 0 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 09:11:26,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:26,320 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:26,320 INFO L186 Difference]: Start difference. First operand has 451 places, 516 transitions, 9589 flow. Second operand 20 states and 991 transitions. [2021-11-09 09:11:26,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 568 transitions, 11242 flow [2021-11-09 09:11:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 568 transitions, 11066 flow, removed 30 selfloop flow, removed 16 redundant places. [2021-11-09 09:11:26,724 INFO L242 Difference]: Finished difference. Result has 458 places, 525 transitions, 9689 flow [2021-11-09 09:11:26,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=9417, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9689, PETRI_PLACES=458, PETRI_TRANSITIONS=525} [2021-11-09 09:11:26,725 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 389 predicate places. [2021-11-09 09:11:26,725 INFO L470 AbstractCegarLoop]: Abstraction has has 458 places, 525 transitions, 9689 flow [2021-11-09 09:11:26,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:26,726 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:26,726 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:26,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:26,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 09:11:26,954 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash -877185075, now seen corresponding path program 44 times [2021-11-09 09:11:26,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:26,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439478574] [2021-11-09 09:11:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:26,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:27,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:27,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439478574] [2021-11-09 09:11:27,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439478574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:27,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298394833] [2021-11-09 09:11:27,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:11:27,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:27,229 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:27,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:11:29,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:11:29,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:29,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298394833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:29,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:29,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:11:29,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735005017] [2021-11-09 09:11:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:11:29,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:11:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:11:29,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:29,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 525 transitions, 9689 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:29,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:29,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:29,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:30,903 INFO L129 PetriNetUnfolder]: 828/2245 cut-off events. [2021-11-09 09:11:30,903 INFO L130 PetriNetUnfolder]: For 54188/54188 co-relation queries the response was YES. [2021-11-09 09:11:30,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17423 conditions, 2245 events. 828/2245 cut-off events. For 54188/54188 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 17848 event pairs, 198 based on Foata normal form. 2/2245 useless extension candidates. Maximal degree in co-relation 17282. Up to 1280 conditions per place. [2021-11-09 09:11:30,958 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 493 selfloop transitions, 124 changer transitions 7/660 dead transitions. [2021-11-09 09:11:30,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 660 transitions, 13447 flow [2021-11-09 09:11:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:11:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:11:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1004 transitions. [2021-11-09 09:11:30,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6435897435897436 [2021-11-09 09:11:30,960 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1004 transitions. [2021-11-09 09:11:30,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1004 transitions. [2021-11-09 09:11:30,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:30,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1004 transitions. [2021-11-09 09:11:30,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 50.2) internal successors, (1004), 20 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 09:11:30,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:30,962 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:30,962 INFO L186 Difference]: Start difference. First operand has 458 places, 525 transitions, 9689 flow. Second operand 20 states and 1004 transitions. [2021-11-09 09:11:30,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 660 transitions, 13447 flow [2021-11-09 09:11:31,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 660 transitions, 13279 flow, removed 24 selfloop flow, removed 13 redundant places. [2021-11-09 09:11:31,322 INFO L242 Difference]: Finished difference. Result has 470 places, 591 transitions, 11615 flow [2021-11-09 09:11:31,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=9581, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11615, PETRI_PLACES=470, PETRI_TRANSITIONS=591} [2021-11-09 09:11:31,323 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 401 predicate places. [2021-11-09 09:11:31,323 INFO L470 AbstractCegarLoop]: Abstraction has has 470 places, 591 transitions, 11615 flow [2021-11-09 09:11:31,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:31,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:31,323 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:31,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:31,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 09:11:31,524 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:31,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:31,524 INFO L85 PathProgramCache]: Analyzing trace with hash -46459951, now seen corresponding path program 45 times [2021-11-09 09:11:31,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:31,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607906630] [2021-11-09 09:11:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:31,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:31,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:31,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607906630] [2021-11-09 09:11:31,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607906630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:31,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032445788] [2021-11-09 09:11:31,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:11:31,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:31,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:31,742 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:31,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:11:33,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:11:33,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:33,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:33,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:34,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032445788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:34,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:34,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:11:34,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285992441] [2021-11-09 09:11:34,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:11:34,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:11:34,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:11:34,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:34,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 591 transitions, 11615 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:34,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:34,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:34,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:35,835 INFO L129 PetriNetUnfolder]: 907/2469 cut-off events. [2021-11-09 09:11:35,836 INFO L130 PetriNetUnfolder]: For 64775/64775 co-relation queries the response was YES. [2021-11-09 09:11:35,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19651 conditions, 2469 events. 907/2469 cut-off events. For 64775/64775 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20123 event pairs, 195 based on Foata normal form. 2/2469 useless extension candidates. Maximal degree in co-relation 19504. Up to 1202 conditions per place. [2021-11-09 09:11:35,884 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 470 selfloop transitions, 194 changer transitions 7/707 dead transitions. [2021-11-09 09:11:35,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 707 transitions, 14997 flow [2021-11-09 09:11:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:11:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:11:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1336 transitions. [2021-11-09 09:11:35,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6343779677113011 [2021-11-09 09:11:35,885 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1336 transitions. [2021-11-09 09:11:35,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1336 transitions. [2021-11-09 09:11:35,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:35,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1336 transitions. [2021-11-09 09:11:35,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 49.48148148148148) internal successors, (1336), 27 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 09:11:35,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:11:35,888 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:11:35,888 INFO L186 Difference]: Start difference. First operand has 470 places, 591 transitions, 11615 flow. Second operand 27 states and 1336 transitions. [2021-11-09 09:11:35,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 707 transitions, 14997 flow [2021-11-09 09:11:36,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 707 transitions, 14720 flow, removed 83 selfloop flow, removed 8 redundant places. [2021-11-09 09:11:36,313 INFO L242 Difference]: Finished difference. Result has 493 places, 635 transitions, 12958 flow [2021-11-09 09:11:36,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=11400, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12958, PETRI_PLACES=493, PETRI_TRANSITIONS=635} [2021-11-09 09:11:36,314 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 424 predicate places. [2021-11-09 09:11:36,314 INFO L470 AbstractCegarLoop]: Abstraction has has 493 places, 635 transitions, 12958 flow [2021-11-09 09:11:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:36,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:36,315 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:36,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:36,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 09:11:36,515 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2068353119, now seen corresponding path program 46 times [2021-11-09 09:11:36,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:36,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007427225] [2021-11-09 09:11:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:36,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:36,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:36,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007427225] [2021-11-09 09:11:36,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007427225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:36,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527309993] [2021-11-09 09:11:36,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:11:36,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:36,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:36,745 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:36,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:11:38,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:11:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:39,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527309993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:39,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:39,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:11:39,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497832387] [2021-11-09 09:11:39,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:11:39,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:11:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:11:39,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:39,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 635 transitions, 12958 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:39,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:39,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:39,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:40,662 INFO L129 PetriNetUnfolder]: 907/2457 cut-off events. [2021-11-09 09:11:40,662 INFO L130 PetriNetUnfolder]: For 69811/69811 co-relation queries the response was YES. [2021-11-09 09:11:40,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20100 conditions, 2457 events. 907/2457 cut-off events. For 69811/69811 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20018 event pairs, 210 based on Foata normal form. 1/2455 useless extension candidates. Maximal degree in co-relation 19948. Up to 1551 conditions per place. [2021-11-09 09:11:40,714 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 519 selfloop transitions, 120 changer transitions 7/682 dead transitions. [2021-11-09 09:11:40,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 682 transitions, 14868 flow [2021-11-09 09:11:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:11:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:11:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 991 transitions. [2021-11-09 09:11:40,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6352564102564102 [2021-11-09 09:11:40,716 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 991 transitions. [2021-11-09 09:11:40,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 991 transitions. [2021-11-09 09:11:40,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:40,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 991 transitions. [2021-11-09 09:11:40,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.55) internal successors, (991), 20 states have internal predecessors, (991), 0 states have call successors, (0), 0 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 09:11:40,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:40,718 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:11:40,718 INFO L186 Difference]: Start difference. First operand has 493 places, 635 transitions, 12958 flow. Second operand 20 states and 991 transitions. [2021-11-09 09:11:40,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 682 transitions, 14868 flow [2021-11-09 09:11:41,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 682 transitions, 14391 flow, removed 95 selfloop flow, removed 17 redundant places. [2021-11-09 09:11:41,173 INFO L242 Difference]: Finished difference. Result has 499 places, 641 transitions, 12895 flow [2021-11-09 09:11:41,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=12509, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12895, PETRI_PLACES=499, PETRI_TRANSITIONS=641} [2021-11-09 09:11:41,174 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 430 predicate places. [2021-11-09 09:11:41,174 INFO L470 AbstractCegarLoop]: Abstraction has has 499 places, 641 transitions, 12895 flow [2021-11-09 09:11:41,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:11:41,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:41,175 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:41,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:41,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:41,376 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1872070247, now seen corresponding path program 47 times [2021-11-09 09:11:41,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:41,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859912174] [2021-11-09 09:11:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:41,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:41,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:41,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859912174] [2021-11-09 09:11:41,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859912174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:41,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393879594] [2021-11-09 09:11:41,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:11:41,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:41,585 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:41,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:11:43,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:11:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:44,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393879594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:44,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:44,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:11:44,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629974497] [2021-11-09 09:11:44,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:11:44,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:11:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:11:44,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:44,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 641 transitions, 12895 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:44,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:44,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:44,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:45,752 INFO L129 PetriNetUnfolder]: 954/2568 cut-off events. [2021-11-09 09:11:45,752 INFO L130 PetriNetUnfolder]: For 71011/71011 co-relation queries the response was YES. [2021-11-09 09:11:45,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20880 conditions, 2568 events. 954/2568 cut-off events. For 71011/71011 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21018 event pairs, 187 based on Foata normal form. 2/2568 useless extension candidates. Maximal degree in co-relation 20726. Up to 1150 conditions per place. [2021-11-09 09:11:45,810 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 462 selfloop transitions, 229 changer transitions 7/734 dead transitions. [2021-11-09 09:11:45,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 734 transitions, 15785 flow [2021-11-09 09:11:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:11:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 09:11:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1291 transitions. [2021-11-09 09:11:45,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365877712031558 [2021-11-09 09:11:45,812 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1291 transitions. [2021-11-09 09:11:45,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1291 transitions. [2021-11-09 09:11:45,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:45,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1291 transitions. [2021-11-09 09:11:45,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 49.65384615384615) internal successors, (1291), 26 states have internal predecessors, (1291), 0 states have call successors, (0), 0 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 09:11:45,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:11:45,815 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:11:45,815 INFO L186 Difference]: Start difference. First operand has 499 places, 641 transitions, 12895 flow. Second operand 26 states and 1291 transitions. [2021-11-09 09:11:45,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 734 transitions, 15785 flow [2021-11-09 09:11:46,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 734 transitions, 15571 flow, removed 32 selfloop flow, removed 13 redundant places. [2021-11-09 09:11:46,315 INFO L242 Difference]: Finished difference. Result has 514 places, 664 transitions, 13853 flow [2021-11-09 09:11:46,315 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=12721, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13853, PETRI_PLACES=514, PETRI_TRANSITIONS=664} [2021-11-09 09:11:46,316 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 445 predicate places. [2021-11-09 09:11:46,316 INFO L470 AbstractCegarLoop]: Abstraction has has 514 places, 664 transitions, 13853 flow [2021-11-09 09:11:46,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:46,316 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:46,316 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:46,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:46,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:11:46,517 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2092718665, now seen corresponding path program 48 times [2021-11-09 09:11:46,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:46,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684369626] [2021-11-09 09:11:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:46,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:46,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:46,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684369626] [2021-11-09 09:11:46,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684369626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:46,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963376828] [2021-11-09 09:11:46,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:11:46,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:46,738 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:46,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:11:48,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:11:48,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:49,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963376828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:49,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:49,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:11:49,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897465177] [2021-11-09 09:11:49,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:11:49,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:11:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:11:49,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:49,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 664 transitions, 13853 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:49,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:49,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:49,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:51,008 INFO L129 PetriNetUnfolder]: 954/2575 cut-off events. [2021-11-09 09:11:51,008 INFO L130 PetriNetUnfolder]: For 77400/77400 co-relation queries the response was YES. [2021-11-09 09:11:51,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21459 conditions, 2575 events. 954/2575 cut-off events. For 77400/77400 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21206 event pairs, 192 based on Foata normal form. 6/2579 useless extension candidates. Maximal degree in co-relation 21303. Up to 1150 conditions per place. [2021-11-09 09:11:51,063 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 439 selfloop transitions, 256 changer transitions 9/740 dead transitions. [2021-11-09 09:11:51,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 740 transitions, 16373 flow [2021-11-09 09:11:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:11:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-09 09:11:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1382 transitions. [2021-11-09 09:11:51,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6327838827838828 [2021-11-09 09:11:51,064 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1382 transitions. [2021-11-09 09:11:51,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1382 transitions. [2021-11-09 09:11:51,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:51,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1382 transitions. [2021-11-09 09:11:51,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 49.357142857142854) internal successors, (1382), 28 states have internal predecessors, (1382), 0 states have call successors, (0), 0 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 09:11:51,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:11:51,067 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 78.0) internal successors, (2262), 29 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 09:11:51,067 INFO L186 Difference]: Start difference. First operand has 514 places, 664 transitions, 13853 flow. Second operand 28 states and 1382 transitions. [2021-11-09 09:11:51,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 740 transitions, 16373 flow [2021-11-09 09:11:51,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 740 transitions, 15524 flow, removed 98 selfloop flow, removed 22 redundant places. [2021-11-09 09:11:51,597 INFO L242 Difference]: Finished difference. Result has 521 places, 683 transitions, 14036 flow [2021-11-09 09:11:51,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=13066, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14036, PETRI_PLACES=521, PETRI_TRANSITIONS=683} [2021-11-09 09:11:51,598 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 452 predicate places. [2021-11-09 09:11:51,598 INFO L470 AbstractCegarLoop]: Abstraction has has 521 places, 683 transitions, 14036 flow [2021-11-09 09:11:51,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:51,598 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:51,598 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:51,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:51,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:51,810 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:51,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1784066113, now seen corresponding path program 49 times [2021-11-09 09:11:51,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:51,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162586147] [2021-11-09 09:11:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:51,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:52,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:52,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162586147] [2021-11-09 09:11:52,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162586147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:52,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862092465] [2021-11-09 09:11:52,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:11:52,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:52,057 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:11:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:11:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:54,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862092465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:54,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:11:54,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:11:54,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211181707] [2021-11-09 09:11:54,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:11:54,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:11:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:11:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:11:54,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:11:54,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 683 transitions, 14036 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:54,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:11:54,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:11:54,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:11:56,394 INFO L129 PetriNetUnfolder]: 992/2540 cut-off events. [2021-11-09 09:11:56,394 INFO L130 PetriNetUnfolder]: For 78250/78250 co-relation queries the response was YES. [2021-11-09 09:11:56,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22019 conditions, 2540 events. 992/2540 cut-off events. For 78250/78250 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 20392 event pairs, 218 based on Foata normal form. 1/2539 useless extension candidates. Maximal degree in co-relation 21862. Up to 1373 conditions per place. [2021-11-09 09:11:56,450 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 518 selfloop transitions, 201 changer transitions 7/762 dead transitions. [2021-11-09 09:11:56,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 762 transitions, 16962 flow [2021-11-09 09:11:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:11:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 09:11:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1187 transitions. [2021-11-09 09:11:56,452 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6340811965811965 [2021-11-09 09:11:56,452 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1187 transitions. [2021-11-09 09:11:56,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1187 transitions. [2021-11-09 09:11:56,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:11:56,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1187 transitions. [2021-11-09 09:11:56,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 49.458333333333336) internal successors, (1187), 24 states have internal predecessors, (1187), 0 states have call successors, (0), 0 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 09:11:56,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:11:56,456 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:11:56,456 INFO L186 Difference]: Start difference. First operand has 521 places, 683 transitions, 14036 flow. Second operand 24 states and 1187 transitions. [2021-11-09 09:11:56,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 762 transitions, 16962 flow [2021-11-09 09:11:56,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 762 transitions, 16378 flow, removed 44 selfloop flow, removed 25 redundant places. [2021-11-09 09:11:57,000 INFO L242 Difference]: Finished difference. Result has 520 places, 711 transitions, 14736 flow [2021-11-09 09:11:57,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=13498, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=14736, PETRI_PLACES=520, PETRI_TRANSITIONS=711} [2021-11-09 09:11:57,001 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 451 predicate places. [2021-11-09 09:11:57,001 INFO L470 AbstractCegarLoop]: Abstraction has has 520 places, 711 transitions, 14736 flow [2021-11-09 09:11:57,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:11:57,001 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:11:57,002 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:11:57,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:11:57,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:57,206 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:11:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:11:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1730464863, now seen corresponding path program 50 times [2021-11-09 09:11:57,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:11:57,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509716413] [2021-11-09 09:11:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:11:57,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:11:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:11:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:11:57,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:11:57,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509716413] [2021-11-09 09:11:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509716413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:11:57,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744642154] [2021-11-09 09:11:57,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:11:57,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:11:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:11:57,451 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:11:57,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:11:59,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:11:59,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:59,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:11:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:00,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744642154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:00,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:00,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:12:00,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294981598] [2021-11-09 09:12:00,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:12:00,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:12:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:12:00,504 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:00,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 711 transitions, 14736 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:12:00,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:00,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:00,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:02,194 INFO L129 PetriNetUnfolder]: 1035/2607 cut-off events. [2021-11-09 09:12:02,194 INFO L130 PetriNetUnfolder]: For 79784/79784 co-relation queries the response was YES. [2021-11-09 09:12:02,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22628 conditions, 2607 events. 1035/2607 cut-off events. For 79784/79784 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 20970 event pairs, 220 based on Foata normal form. 1/2606 useless extension candidates. Maximal degree in co-relation 22468. Up to 1583 conditions per place. [2021-11-09 09:12:02,253 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 578 selfloop transitions, 170 changer transitions 7/791 dead transitions. [2021-11-09 09:12:02,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 791 transitions, 17650 flow [2021-11-09 09:12:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:12:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:12:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1091 transitions. [2021-11-09 09:12:02,254 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6357808857808858 [2021-11-09 09:12:02,255 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1091 transitions. [2021-11-09 09:12:02,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1091 transitions. [2021-11-09 09:12:02,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:02,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1091 transitions. [2021-11-09 09:12:02,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.59090909090909) internal successors, (1091), 22 states have internal predecessors, (1091), 0 states have call successors, (0), 0 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 09:12:02,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:12:02,257 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:12:02,257 INFO L186 Difference]: Start difference. First operand has 520 places, 711 transitions, 14736 flow. Second operand 22 states and 1091 transitions. [2021-11-09 09:12:02,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 791 transitions, 17650 flow [2021-11-09 09:12:02,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 791 transitions, 17257 flow, removed 41 selfloop flow, removed 20 redundant places. [2021-11-09 09:12:02,841 INFO L242 Difference]: Finished difference. Result has 523 places, 738 transitions, 15413 flow [2021-11-09 09:12:02,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=14357, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15413, PETRI_PLACES=523, PETRI_TRANSITIONS=738} [2021-11-09 09:12:02,842 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 454 predicate places. [2021-11-09 09:12:02,842 INFO L470 AbstractCegarLoop]: Abstraction has has 523 places, 738 transitions, 15413 flow [2021-11-09 09:12:02,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:12:02,842 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:02,842 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:02,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:12:03,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:03,043 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:03,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1927132071, now seen corresponding path program 51 times [2021-11-09 09:12:03,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:03,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620084629] [2021-11-09 09:12:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:03,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:03,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:03,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620084629] [2021-11-09 09:12:03,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620084629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:03,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801582800] [2021-11-09 09:12:03,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:12:03,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:03,304 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:03,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:12:05,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:12:05,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:12:05,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:05,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:06,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801582800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:06,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:06,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:12:06,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309777478] [2021-11-09 09:12:06,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:12:06,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:12:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:12:06,202 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:06,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 738 transitions, 15413 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:06,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:06,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:06,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:08,038 INFO L129 PetriNetUnfolder]: 1072/2700 cut-off events. [2021-11-09 09:12:08,038 INFO L130 PetriNetUnfolder]: For 85316/85316 co-relation queries the response was YES. [2021-11-09 09:12:08,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23590 conditions, 2700 events. 1072/2700 cut-off events. For 85316/85316 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21839 event pairs, 290 based on Foata normal form. 1/2698 useless extension candidates. Maximal degree in co-relation 23430. Up to 2077 conditions per place. [2021-11-09 09:12:08,108 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 714 selfloop transitions, 43 changer transitions 4/797 dead transitions. [2021-11-09 09:12:08,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 797 transitions, 18034 flow [2021-11-09 09:12:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:12:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:12:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1033 transitions. [2021-11-09 09:12:08,109 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6306471306471306 [2021-11-09 09:12:08,110 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1033 transitions. [2021-11-09 09:12:08,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1033 transitions. [2021-11-09 09:12:08,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:08,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1033 transitions. [2021-11-09 09:12:08,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 49.19047619047619) internal successors, (1033), 21 states have internal predecessors, (1033), 0 states have call successors, (0), 0 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 09:12:08,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:12:08,112 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:12:08,112 INFO L186 Difference]: Start difference. First operand has 523 places, 738 transitions, 15413 flow. Second operand 21 states and 1033 transitions. [2021-11-09 09:12:08,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 797 transitions, 18034 flow [2021-11-09 09:12:08,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 797 transitions, 17487 flow, removed 27 selfloop flow, removed 21 redundant places. [2021-11-09 09:12:08,695 INFO L242 Difference]: Finished difference. Result has 525 places, 766 transitions, 15654 flow [2021-11-09 09:12:08,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=14883, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15654, PETRI_PLACES=525, PETRI_TRANSITIONS=766} [2021-11-09 09:12:08,696 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 456 predicate places. [2021-11-09 09:12:08,696 INFO L470 AbstractCegarLoop]: Abstraction has has 525 places, 766 transitions, 15654 flow [2021-11-09 09:12:08,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:08,696 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:08,696 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:08,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 09:12:08,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-09 09:12:08,897 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash -703934151, now seen corresponding path program 52 times [2021-11-09 09:12:08,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:08,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378213521] [2021-11-09 09:12:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:08,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:09,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:09,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378213521] [2021-11-09 09:12:09,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378213521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:09,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949173046] [2021-11-09 09:12:09,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:12:09,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:09,140 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:09,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:12:11,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:12:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:12:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:11,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:12,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949173046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:12,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:12,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:12:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435372638] [2021-11-09 09:12:12,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:12:12,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:12:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:12:12,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:12,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 766 transitions, 15654 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:12,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:12,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:12,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:14,195 INFO L129 PetriNetUnfolder]: 1140/2899 cut-off events. [2021-11-09 09:12:14,196 INFO L130 PetriNetUnfolder]: For 91806/91806 co-relation queries the response was YES. [2021-11-09 09:12:14,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25242 conditions, 2899 events. 1140/2899 cut-off events. For 91806/91806 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23941 event pairs, 293 based on Foata normal form. 1/2896 useless extension candidates. Maximal degree in co-relation 25082. Up to 2160 conditions per place. [2021-11-09 09:12:14,263 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 745 selfloop transitions, 65 changer transitions 4/850 dead transitions. [2021-11-09 09:12:14,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 850 transitions, 18981 flow [2021-11-09 09:12:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:12:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:12:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1032 transitions. [2021-11-09 09:12:14,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.63003663003663 [2021-11-09 09:12:14,264 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1032 transitions. [2021-11-09 09:12:14,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1032 transitions. [2021-11-09 09:12:14,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:14,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1032 transitions. [2021-11-09 09:12:14,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 49.142857142857146) internal successors, (1032), 21 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 09:12:14,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:12:14,267 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:12:14,267 INFO L186 Difference]: Start difference. First operand has 525 places, 766 transitions, 15654 flow. Second operand 21 states and 1032 transitions. [2021-11-09 09:12:14,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 850 transitions, 18981 flow [2021-11-09 09:12:14,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 850 transitions, 18531 flow, removed 218 selfloop flow, removed 4 redundant places. [2021-11-09 09:12:14,976 INFO L242 Difference]: Finished difference. Result has 554 places, 815 transitions, 16698 flow [2021-11-09 09:12:14,977 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=15428, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16698, PETRI_PLACES=554, PETRI_TRANSITIONS=815} [2021-11-09 09:12:14,977 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 485 predicate places. [2021-11-09 09:12:14,977 INFO L470 AbstractCegarLoop]: Abstraction has has 554 places, 815 transitions, 16698 flow [2021-11-09 09:12:14,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:14,978 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:14,978 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:15,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 09:12:15,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 09:12:15,186 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash 792933541, now seen corresponding path program 53 times [2021-11-09 09:12:15,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:15,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399765015] [2021-11-09 09:12:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:15,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:15,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:15,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399765015] [2021-11-09 09:12:15,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399765015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:15,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843088126] [2021-11-09 09:12:15,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:12:15,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:15,508 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:15,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:12:18,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:12:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:12:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843088126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:18,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:18,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:12:18,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164872034] [2021-11-09 09:12:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:12:18,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:12:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:12:18,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:18,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 815 transitions, 16698 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:18,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:18,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:18,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:21,174 INFO L129 PetriNetUnfolder]: 1265/3286 cut-off events. [2021-11-09 09:12:21,174 INFO L130 PetriNetUnfolder]: For 104661/104661 co-relation queries the response was YES. [2021-11-09 09:12:21,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28575 conditions, 3286 events. 1265/3286 cut-off events. For 104661/104661 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27978 event pairs, 313 based on Foata normal form. 1/3283 useless extension candidates. Maximal degree in co-relation 28401. Up to 2304 conditions per place. [2021-11-09 09:12:21,271 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 795 selfloop transitions, 110 changer transitions 4/945 dead transitions. [2021-11-09 09:12:21,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 945 transitions, 21144 flow [2021-11-09 09:12:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:12:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:12:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1034 transitions. [2021-11-09 09:12:21,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6312576312576312 [2021-11-09 09:12:21,273 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1034 transitions. [2021-11-09 09:12:21,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1034 transitions. [2021-11-09 09:12:21,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:21,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1034 transitions. [2021-11-09 09:12:21,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 49.23809523809524) internal successors, (1034), 21 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 09:12:21,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:12:21,276 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 78.0) internal successors, (1716), 22 states have internal predecessors, (1716), 0 states have call successors, (0), 0 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 09:12:21,276 INFO L186 Difference]: Start difference. First operand has 554 places, 815 transitions, 16698 flow. Second operand 21 states and 1034 transitions. [2021-11-09 09:12:21,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 945 transitions, 21144 flow [2021-11-09 09:12:22,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 945 transitions, 20625 flow, removed 245 selfloop flow, removed 6 redundant places. [2021-11-09 09:12:22,309 INFO L242 Difference]: Finished difference. Result has 582 places, 905 transitions, 18790 flow [2021-11-09 09:12:22,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=16432, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18790, PETRI_PLACES=582, PETRI_TRANSITIONS=905} [2021-11-09 09:12:22,311 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 513 predicate places. [2021-11-09 09:12:22,311 INFO L470 AbstractCegarLoop]: Abstraction has has 582 places, 905 transitions, 18790 flow [2021-11-09 09:12:22,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:22,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:22,312 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:22,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 09:12:22,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 09:12:22,536 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash -69389545, now seen corresponding path program 54 times [2021-11-09 09:12:22,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:22,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703585187] [2021-11-09 09:12:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:22,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:22,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:22,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703585187] [2021-11-09 09:12:22,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703585187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:22,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045514120] [2021-11-09 09:12:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:12:22,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:22,968 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:22,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 09:12:25,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 09:12:25,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:12:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:26,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045514120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:26,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:12:26,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187299754] [2021-11-09 09:12:26,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:12:26,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:12:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:12:26,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:26,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 905 transitions, 18790 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:26,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:26,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:26,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:29,087 INFO L129 PetriNetUnfolder]: 1305/3498 cut-off events. [2021-11-09 09:12:29,088 INFO L130 PetriNetUnfolder]: For 109481/109481 co-relation queries the response was YES. [2021-11-09 09:12:29,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29895 conditions, 3498 events. 1305/3498 cut-off events. For 109481/109481 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30369 event pairs, 304 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 29706. Up to 2316 conditions per place. [2021-11-09 09:12:29,178 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 796 selfloop transitions, 128 changer transitions 4/964 dead transitions. [2021-11-09 09:12:29,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 964 transitions, 21713 flow [2021-11-09 09:12:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:12:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 09:12:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1185 transitions. [2021-11-09 09:12:29,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6330128205128205 [2021-11-09 09:12:29,181 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1185 transitions. [2021-11-09 09:12:29,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1185 transitions. [2021-11-09 09:12:29,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:29,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1185 transitions. [2021-11-09 09:12:29,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 49.375) internal successors, (1185), 24 states have internal predecessors, (1185), 0 states have call successors, (0), 0 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 09:12:29,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:12:29,185 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 78.0) internal successors, (1950), 25 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 09:12:29,186 INFO L186 Difference]: Start difference. First operand has 582 places, 905 transitions, 18790 flow. Second operand 24 states and 1185 transitions. [2021-11-09 09:12:29,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 964 transitions, 21713 flow [2021-11-09 09:12:30,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 964 transitions, 21442 flow, removed 130 selfloop flow, removed 4 redundant places. [2021-11-09 09:12:30,289 INFO L242 Difference]: Finished difference. Result has 605 places, 922 transitions, 19291 flow [2021-11-09 09:12:30,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=18535, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=19291, PETRI_PLACES=605, PETRI_TRANSITIONS=922} [2021-11-09 09:12:30,291 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 536 predicate places. [2021-11-09 09:12:30,291 INFO L470 AbstractCegarLoop]: Abstraction has has 605 places, 922 transitions, 19291 flow [2021-11-09 09:12:30,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:30,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:30,291 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:30,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-09 09:12:30,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:30,492 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash 124489001, now seen corresponding path program 55 times [2021-11-09 09:12:30,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:30,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899736764] [2021-11-09 09:12:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:30,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:30,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:30,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899736764] [2021-11-09 09:12:30,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899736764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:30,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967066516] [2021-11-09 09:12:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:12:30,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:30,868 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:30,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 09:12:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:33,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:33,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:34,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967066516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:34,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:34,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:12:34,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312389287] [2021-11-09 09:12:34,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:12:34,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:12:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:12:34,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:34,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 922 transitions, 19291 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:12:34,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:34,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:34,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:37,578 INFO L129 PetriNetUnfolder]: 1361/3601 cut-off events. [2021-11-09 09:12:37,578 INFO L130 PetriNetUnfolder]: For 113541/113541 co-relation queries the response was YES. [2021-11-09 09:12:37,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31462 conditions, 3601 events. 1361/3601 cut-off events. For 113541/113541 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31435 event pairs, 331 based on Foata normal form. 1/3598 useless extension candidates. Maximal degree in co-relation 31268. Up to 2119 conditions per place. [2021-11-09 09:12:37,655 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 773 selfloop transitions, 226 changer transitions 4/1039 dead transitions. [2021-11-09 09:12:37,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 1039 transitions, 23739 flow [2021-11-09 09:12:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:12:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:12:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1084 transitions. [2021-11-09 09:12:37,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6317016317016317 [2021-11-09 09:12:37,657 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1084 transitions. [2021-11-09 09:12:37,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1084 transitions. [2021-11-09 09:12:37,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:37,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1084 transitions. [2021-11-09 09:12:37,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.27272727272727) internal successors, (1084), 22 states have internal predecessors, (1084), 0 states have call successors, (0), 0 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 09:12:37,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:12:37,659 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:12:37,659 INFO L186 Difference]: Start difference. First operand has 605 places, 922 transitions, 19291 flow. Second operand 22 states and 1084 transitions. [2021-11-09 09:12:37,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 1039 transitions, 23739 flow [2021-11-09 09:12:38,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1039 transitions, 23452 flow, removed 46 selfloop flow, removed 14 redundant places. [2021-11-09 09:12:38,751 INFO L242 Difference]: Finished difference. Result has 623 places, 1006 transitions, 21757 flow [2021-11-09 09:12:38,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=19058, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=21757, PETRI_PLACES=623, PETRI_TRANSITIONS=1006} [2021-11-09 09:12:38,752 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 554 predicate places. [2021-11-09 09:12:38,752 INFO L470 AbstractCegarLoop]: Abstraction has has 623 places, 1006 transitions, 21757 flow [2021-11-09 09:12:38,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:12:38,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:38,752 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:38,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 09:12:38,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:12:38,953 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1312769831, now seen corresponding path program 56 times [2021-11-09 09:12:38,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:38,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167646174] [2021-11-09 09:12:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:38,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:39,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:39,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167646174] [2021-11-09 09:12:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167646174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:39,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352706128] [2021-11-09 09:12:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:12:39,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:39,209 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:39,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 09:12:42,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:12:42,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:12:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:42,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352706128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:42,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:42,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:12:42,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321583354] [2021-11-09 09:12:42,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:12:42,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:12:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:12:42,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:42,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1006 transitions, 21757 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:42,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:42,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:42,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:45,205 INFO L129 PetriNetUnfolder]: 1380/3706 cut-off events. [2021-11-09 09:12:45,205 INFO L130 PetriNetUnfolder]: For 124675/124675 co-relation queries the response was YES. [2021-11-09 09:12:45,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32884 conditions, 3706 events. 1380/3706 cut-off events. For 124675/124675 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32852 event pairs, 317 based on Foata normal form. 2/3704 useless extension candidates. Maximal degree in co-relation 32679. Up to 2367 conditions per place. [2021-11-09 09:12:45,385 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 889 selfloop transitions, 122 changer transitions 6/1053 dead transitions. [2021-11-09 09:12:45,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1053 transitions, 24597 flow [2021-11-09 09:12:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:12:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:12:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 858 transitions. [2021-11-09 09:12:45,386 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2021-11-09 09:12:45,387 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 858 transitions. [2021-11-09 09:12:45,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 858 transitions. [2021-11-09 09:12:45,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:45,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 858 transitions. [2021-11-09 09:12:45,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 50.470588235294116) internal successors, (858), 17 states have internal predecessors, (858), 0 states have call successors, (0), 0 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 09:12:45,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:12:45,390 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:12:45,390 INFO L186 Difference]: Start difference. First operand has 623 places, 1006 transitions, 21757 flow. Second operand 17 states and 858 transitions. [2021-11-09 09:12:45,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1053 transitions, 24597 flow [2021-11-09 09:12:46,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1053 transitions, 23649 flow, removed 222 selfloop flow, removed 12 redundant places. [2021-11-09 09:12:46,400 INFO L242 Difference]: Finished difference. Result has 629 places, 1009 transitions, 21290 flow [2021-11-09 09:12:46,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=20901, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=21290, PETRI_PLACES=629, PETRI_TRANSITIONS=1009} [2021-11-09 09:12:46,401 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 560 predicate places. [2021-11-09 09:12:46,401 INFO L470 AbstractCegarLoop]: Abstraction has has 629 places, 1009 transitions, 21290 flow [2021-11-09 09:12:46,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:46,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:46,401 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:46,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 09:12:46,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 09:12:46,602 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:46,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1611543677, now seen corresponding path program 57 times [2021-11-09 09:12:46,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:46,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652708413] [2021-11-09 09:12:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:46,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:46,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:46,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652708413] [2021-11-09 09:12:46,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652708413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:46,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191522258] [2021-11-09 09:12:46,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:12:46,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:46,991 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:46,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 09:12:49,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:12:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:12:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:50,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191522258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:50,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:50,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:12:50,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450303693] [2021-11-09 09:12:50,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:12:50,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:50,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:12:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:12:50,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:50,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 1009 transitions, 21290 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:50,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:50,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:50,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:12:52,923 INFO L129 PetriNetUnfolder]: 1380/3685 cut-off events. [2021-11-09 09:12:52,924 INFO L130 PetriNetUnfolder]: For 118506/118506 co-relation queries the response was YES. [2021-11-09 09:12:52,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32382 conditions, 3685 events. 1380/3685 cut-off events. For 118506/118506 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32587 event pairs, 315 based on Foata normal form. 4/3686 useless extension candidates. Maximal degree in co-relation 32177. Up to 2429 conditions per place. [2021-11-09 09:12:53,012 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 855 selfloop transitions, 149 changer transitions 7/1047 dead transitions. [2021-11-09 09:12:53,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1047 transitions, 23942 flow [2021-11-09 09:12:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:12:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:12:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 995 transitions. [2021-11-09 09:12:53,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2021-11-09 09:12:53,014 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 995 transitions. [2021-11-09 09:12:53,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 995 transitions. [2021-11-09 09:12:53,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:12:53,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 995 transitions. [2021-11-09 09:12:53,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.75) internal successors, (995), 20 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 09:12:53,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:12:53,024 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:12:53,024 INFO L186 Difference]: Start difference. First operand has 629 places, 1009 transitions, 21290 flow. Second operand 20 states and 995 transitions. [2021-11-09 09:12:53,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1047 transitions, 23942 flow [2021-11-09 09:12:54,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 1047 transitions, 23674 flow, removed 29 selfloop flow, removed 14 redundant places. [2021-11-09 09:12:54,116 INFO L242 Difference]: Finished difference. Result has 634 places, 1007 transitions, 21323 flow [2021-11-09 09:12:54,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=21032, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21323, PETRI_PLACES=634, PETRI_TRANSITIONS=1007} [2021-11-09 09:12:54,117 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 565 predicate places. [2021-11-09 09:12:54,117 INFO L470 AbstractCegarLoop]: Abstraction has has 634 places, 1007 transitions, 21323 flow [2021-11-09 09:12:54,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:54,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:12:54,118 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:12:54,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 09:12:54,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 09:12:54,318 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:12:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:12:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash -271118961, now seen corresponding path program 58 times [2021-11-09 09:12:54,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:12:54,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910224738] [2021-11-09 09:12:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:12:54,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:12:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:12:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:54,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:12:54,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910224738] [2021-11-09 09:12:54,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910224738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:54,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269608899] [2021-11-09 09:12:54,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:12:54,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:12:54,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:12:54,563 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:12:54,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 09:12:57,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:12:57,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:12:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:12:57,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:12:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:12:57,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269608899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:12:57,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:12:57,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:12:57,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763721571] [2021-11-09 09:12:57,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:12:57,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:12:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:12:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:12:57,901 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:12:57,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1007 transitions, 21323 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:12:57,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:12:57,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:12:57,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:13:00,466 INFO L129 PetriNetUnfolder]: 1372/3602 cut-off events. [2021-11-09 09:13:00,466 INFO L130 PetriNetUnfolder]: For 116676/116676 co-relation queries the response was YES. [2021-11-09 09:13:00,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32090 conditions, 3602 events. 1372/3602 cut-off events. For 116676/116676 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 31586 event pairs, 327 based on Foata normal form. 2/3601 useless extension candidates. Maximal degree in co-relation 31885. Up to 2367 conditions per place. [2021-11-09 09:13:00,551 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 873 selfloop transitions, 135 changer transitions 5/1049 dead transitions. [2021-11-09 09:13:00,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 1049 transitions, 23969 flow [2021-11-09 09:13:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:13:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:13:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 811 transitions. [2021-11-09 09:13:00,553 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6498397435897436 [2021-11-09 09:13:00,553 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 811 transitions. [2021-11-09 09:13:00,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 811 transitions. [2021-11-09 09:13:00,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:13:00,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 811 transitions. [2021-11-09 09:13:00,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 50.6875) internal successors, (811), 16 states have internal predecessors, (811), 0 states have call successors, (0), 0 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 09:13:00,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:13:00,555 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:13:00,556 INFO L186 Difference]: Start difference. First operand has 634 places, 1007 transitions, 21323 flow. Second operand 16 states and 811 transitions. [2021-11-09 09:13:00,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 1049 transitions, 23969 flow [2021-11-09 09:13:01,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 1049 transitions, 23661 flow, removed 11 selfloop flow, removed 17 redundant places. [2021-11-09 09:13:01,622 INFO L242 Difference]: Finished difference. Result has 630 places, 1009 transitions, 21429 flow [2021-11-09 09:13:01,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=21031, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=21429, PETRI_PLACES=630, PETRI_TRANSITIONS=1009} [2021-11-09 09:13:01,624 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 561 predicate places. [2021-11-09 09:13:01,624 INFO L470 AbstractCegarLoop]: Abstraction has has 630 places, 1009 transitions, 21429 flow [2021-11-09 09:13:01,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:01,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:13:01,625 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:13:01,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-09 09:13:01,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-09 09:13:01,838 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:13:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:13:01,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1918548623, now seen corresponding path program 59 times [2021-11-09 09:13:01,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:13:01,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687654107] [2021-11-09 09:13:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:13:01,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:13:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:02,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:13:02,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687654107] [2021-11-09 09:13:02,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687654107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:02,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845363956] [2021-11-09 09:13:02,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:13:02,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:02,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:13:02,185 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:13:02,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 09:13:04,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:13:04,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:13:04,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:13:04,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:13:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:05,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845363956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:05,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:13:05,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:13:05,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308928795] [2021-11-09 09:13:05,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:13:05,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:13:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:13:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:13:05,367 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:13:05,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 1009 transitions, 21429 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:05,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:13:05,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:13:05,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:13:08,024 INFO L129 PetriNetUnfolder]: 1368/3614 cut-off events. [2021-11-09 09:13:08,024 INFO L130 PetriNetUnfolder]: For 118984/118984 co-relation queries the response was YES. [2021-11-09 09:13:08,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32288 conditions, 3614 events. 1368/3614 cut-off events. For 118984/118984 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 31688 event pairs, 350 based on Foata normal form. 4/3615 useless extension candidates. Maximal degree in co-relation 32082. Up to 2412 conditions per place. [2021-11-09 09:13:08,105 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 903 selfloop transitions, 114 changer transitions 4/1057 dead transitions. [2021-11-09 09:13:08,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1057 transitions, 24425 flow [2021-11-09 09:13:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:13:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:13:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 845 transitions. [2021-11-09 09:13:08,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2021-11-09 09:13:08,106 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 845 transitions. [2021-11-09 09:13:08,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 845 transitions. [2021-11-09 09:13:08,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:13:08,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 845 transitions. [2021-11-09 09:13:08,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 49.705882352941174) internal successors, (845), 17 states have internal predecessors, (845), 0 states have call successors, (0), 0 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 09:13:08,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:13:08,108 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:13:08,108 INFO L186 Difference]: Start difference. First operand has 630 places, 1009 transitions, 21429 flow. Second operand 17 states and 845 transitions. [2021-11-09 09:13:08,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1057 transitions, 24425 flow [2021-11-09 09:13:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1057 transitions, 24078 flow, removed 66 selfloop flow, removed 13 redundant places. [2021-11-09 09:13:09,079 INFO L242 Difference]: Finished difference. Result has 634 places, 1025 transitions, 21816 flow [2021-11-09 09:13:09,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=21176, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=21816, PETRI_PLACES=634, PETRI_TRANSITIONS=1025} [2021-11-09 09:13:09,080 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 565 predicate places. [2021-11-09 09:13:09,080 INFO L470 AbstractCegarLoop]: Abstraction has has 634 places, 1025 transitions, 21816 flow [2021-11-09 09:13:09,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:09,081 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:13:09,081 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:13:09,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 09:13:09,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:09,282 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:13:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:13:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 204056451, now seen corresponding path program 60 times [2021-11-09 09:13:09,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:13:09,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097707157] [2021-11-09 09:13:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:13:09,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:13:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:09,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:13:09,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097707157] [2021-11-09 09:13:09,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097707157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:09,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244625486] [2021-11-09 09:13:09,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:13:09,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:09,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:13:09,639 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:13:09,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 09:13:12,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 09:13:12,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:13:12,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:13:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:13:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:12,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244625486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:12,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:13:12,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:13:12,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417542355] [2021-11-09 09:13:12,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:13:12,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:13:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:13:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:13:12,875 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:13:12,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1025 transitions, 21816 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:12,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:13:12,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:13:12,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:13:15,446 INFO L129 PetriNetUnfolder]: 1397/3724 cut-off events. [2021-11-09 09:13:15,446 INFO L130 PetriNetUnfolder]: For 120974/120974 co-relation queries the response was YES. [2021-11-09 09:13:15,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32956 conditions, 3724 events. 1397/3724 cut-off events. For 120974/120974 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 33135 event pairs, 332 based on Foata normal form. 2/3723 useless extension candidates. Maximal degree in co-relation 32749. Up to 2531 conditions per place. [2021-11-09 09:13:15,528 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 927 selfloop transitions, 118 changer transitions 6/1087 dead transitions. [2021-11-09 09:13:15,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1087 transitions, 24983 flow [2021-11-09 09:13:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:13:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:13:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 998 transitions. [2021-11-09 09:13:15,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6397435897435897 [2021-11-09 09:13:15,529 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 998 transitions. [2021-11-09 09:13:15,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 998 transitions. [2021-11-09 09:13:15,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:13:15,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 998 transitions. [2021-11-09 09:13:15,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.9) internal successors, (998), 20 states have internal predecessors, (998), 0 states have call successors, (0), 0 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 09:13:15,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:13:15,532 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:13:15,532 INFO L186 Difference]: Start difference. First operand has 634 places, 1025 transitions, 21816 flow. Second operand 20 states and 998 transitions. [2021-11-09 09:13:15,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1087 transitions, 24983 flow [2021-11-09 09:13:16,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 1087 transitions, 24795 flow, removed 46 selfloop flow, removed 10 redundant places. [2021-11-09 09:13:16,543 INFO L242 Difference]: Finished difference. Result has 647 places, 1038 transitions, 22271 flow [2021-11-09 09:13:16,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=21666, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=909, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22271, PETRI_PLACES=647, PETRI_TRANSITIONS=1038} [2021-11-09 09:13:16,544 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 578 predicate places. [2021-11-09 09:13:16,544 INFO L470 AbstractCegarLoop]: Abstraction has has 647 places, 1038 transitions, 22271 flow [2021-11-09 09:13:16,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:16,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:13:16,544 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:13:16,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-09 09:13:16,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-09 09:13:16,745 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:13:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:13:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1484700535, now seen corresponding path program 61 times [2021-11-09 09:13:16,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:13:16,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346854786] [2021-11-09 09:13:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:13:16,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:13:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:17,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:13:17,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346854786] [2021-11-09 09:13:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346854786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:17,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106850962] [2021-11-09 09:13:17,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:13:17,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:13:17,160 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:13:17,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 09:13:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:13:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:13:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:20,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106850962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:20,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:13:20,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:13:20,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457772491] [2021-11-09 09:13:20,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:13:20,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:13:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:13:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:13:20,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:13:20,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 1038 transitions, 22271 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:20,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:13:20,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:13:20,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:13:23,776 INFO L129 PetriNetUnfolder]: 1423/3830 cut-off events. [2021-11-09 09:13:23,776 INFO L130 PetriNetUnfolder]: For 126405/126405 co-relation queries the response was YES. [2021-11-09 09:13:23,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33874 conditions, 3830 events. 1423/3830 cut-off events. For 126405/126405 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34469 event pairs, 322 based on Foata normal form. 1/3828 useless extension candidates. Maximal degree in co-relation 33662. Up to 2513 conditions per place. [2021-11-09 09:13:23,882 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 911 selfloop transitions, 162 changer transitions 6/1115 dead transitions. [2021-11-09 09:13:23,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 1115 transitions, 25733 flow [2021-11-09 09:13:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:13:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:13:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1000 transitions. [2021-11-09 09:13:23,884 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2021-11-09 09:13:23,885 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1000 transitions. [2021-11-09 09:13:23,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1000 transitions. [2021-11-09 09:13:23,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:13:23,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1000 transitions. [2021-11-09 09:13:23,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 50.0) internal successors, (1000), 20 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 09:13:23,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:13:23,887 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:13:23,887 INFO L186 Difference]: Start difference. First operand has 647 places, 1038 transitions, 22271 flow. Second operand 20 states and 1000 transitions. [2021-11-09 09:13:23,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 1115 transitions, 25733 flow [2021-11-09 09:13:24,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1115 transitions, 25458 flow, removed 46 selfloop flow, removed 14 redundant places. [2021-11-09 09:13:24,971 INFO L242 Difference]: Finished difference. Result has 656 places, 1057 transitions, 22900 flow [2021-11-09 09:13:24,972 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=22050, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=877, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22900, PETRI_PLACES=656, PETRI_TRANSITIONS=1057} [2021-11-09 09:13:24,972 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 587 predicate places. [2021-11-09 09:13:24,972 INFO L470 AbstractCegarLoop]: Abstraction has has 656 places, 1057 transitions, 22900 flow [2021-11-09 09:13:24,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:24,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:13:24,973 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:13:25,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-09 09:13:25,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-09 09:13:25,174 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:13:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:13:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1787538307, now seen corresponding path program 62 times [2021-11-09 09:13:25,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:13:25,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034375819] [2021-11-09 09:13:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:13:25,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:13:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:25,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:13:25,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034375819] [2021-11-09 09:13:25,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034375819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:25,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235017128] [2021-11-09 09:13:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:13:25,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:13:25,426 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:13:25,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 09:13:28,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:13:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:13:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:13:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:13:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:29,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235017128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:29,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:13:29,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:13:29,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248908572] [2021-11-09 09:13:29,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:13:29,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:13:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:13:29,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:13:29,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:13:29,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 1057 transitions, 22900 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:29,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:13:29,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:13:29,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:13:32,460 INFO L129 PetriNetUnfolder]: 1419/3843 cut-off events. [2021-11-09 09:13:32,460 INFO L130 PetriNetUnfolder]: For 127398/127398 co-relation queries the response was YES. [2021-11-09 09:13:32,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34021 conditions, 3843 events. 1419/3843 cut-off events. For 127398/127398 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34731 event pairs, 326 based on Foata normal form. 4/3844 useless extension candidates. Maximal degree in co-relation 33805. Up to 2505 conditions per place. [2021-11-09 09:13:32,783 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 907 selfloop transitions, 156 changer transitions 4/1103 dead transitions. [2021-11-09 09:13:32,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 1103 transitions, 25899 flow [2021-11-09 09:13:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:13:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:13:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1089 transitions. [2021-11-09 09:13:32,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2021-11-09 09:13:32,785 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1089 transitions. [2021-11-09 09:13:32,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1089 transitions. [2021-11-09 09:13:32,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:13:32,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1089 transitions. [2021-11-09 09:13:32,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.5) internal successors, (1089), 22 states have internal predecessors, (1089), 0 states have call successors, (0), 0 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 09:13:32,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:13:32,787 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:13:32,788 INFO L186 Difference]: Start difference. First operand has 656 places, 1057 transitions, 22900 flow. Second operand 22 states and 1089 transitions. [2021-11-09 09:13:32,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 1103 transitions, 25899 flow [2021-11-09 09:13:33,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 1103 transitions, 25625 flow, removed 25 selfloop flow, removed 13 redundant places. [2021-11-09 09:13:34,006 INFO L242 Difference]: Finished difference. Result has 666 places, 1063 transitions, 23247 flow [2021-11-09 09:13:34,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=22638, PETRI_DIFFERENCE_MINUEND_PLACES=640, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=906, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=23247, PETRI_PLACES=666, PETRI_TRANSITIONS=1063} [2021-11-09 09:13:34,007 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 597 predicate places. [2021-11-09 09:13:34,007 INFO L470 AbstractCegarLoop]: Abstraction has has 666 places, 1063 transitions, 23247 flow [2021-11-09 09:13:34,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:34,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:13:34,008 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:13:34,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-09 09:13:34,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:34,209 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:13:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:13:34,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1468428071, now seen corresponding path program 63 times [2021-11-09 09:13:34,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:13:34,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228789813] [2021-11-09 09:13:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:13:34,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:13:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:34,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:13:34,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228789813] [2021-11-09 09:13:34,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228789813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:34,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095006945] [2021-11-09 09:13:34,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:13:34,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:34,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:13:34,482 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:13:34,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 09:13:38,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:13:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:13:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:13:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:13:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095006945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:38,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:13:38,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:13:38,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449423625] [2021-11-09 09:13:38,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:13:38,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:13:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:13:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:13:38,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:13:38,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 1063 transitions, 23247 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:38,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:13:38,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:13:38,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:13:41,556 INFO L129 PetriNetUnfolder]: 1419/3793 cut-off events. [2021-11-09 09:13:41,556 INFO L130 PetriNetUnfolder]: For 128031/128031 co-relation queries the response was YES. [2021-11-09 09:13:41,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33985 conditions, 3793 events. 1419/3793 cut-off events. For 128031/128031 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 34026 event pairs, 326 based on Foata normal form. 4/3794 useless extension candidates. Maximal degree in co-relation 33767. Up to 2505 conditions per place. [2021-11-09 09:13:41,690 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 920 selfloop transitions, 134 changer transitions 7/1097 dead transitions. [2021-11-09 09:13:41,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 1097 transitions, 25934 flow [2021-11-09 09:13:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:13:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:13:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 943 transitions. [2021-11-09 09:13:41,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.636302294197031 [2021-11-09 09:13:41,691 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 943 transitions. [2021-11-09 09:13:41,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 943 transitions. [2021-11-09 09:13:41,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:13:41,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 943 transitions. [2021-11-09 09:13:41,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 49.63157894736842) internal successors, (943), 19 states have internal predecessors, (943), 0 states have call successors, (0), 0 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 09:13:41,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:13:41,694 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:13:41,694 INFO L186 Difference]: Start difference. First operand has 666 places, 1063 transitions, 23247 flow. Second operand 19 states and 943 transitions. [2021-11-09 09:13:41,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 1097 transitions, 25934 flow [2021-11-09 09:13:43,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 1097 transitions, 25638 flow, removed 59 selfloop flow, removed 13 redundant places. [2021-11-09 09:13:43,134 INFO L242 Difference]: Finished difference. Result has 671 places, 1061 transitions, 23212 flow [2021-11-09 09:13:43,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=22955, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=23212, PETRI_PLACES=671, PETRI_TRANSITIONS=1061} [2021-11-09 09:13:43,136 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 602 predicate places. [2021-11-09 09:13:43,136 INFO L470 AbstractCegarLoop]: Abstraction has has 671 places, 1061 transitions, 23212 flow [2021-11-09 09:13:43,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:43,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:13:43,137 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:13:43,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-09 09:13:43,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:43,362 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:13:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:13:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash 253025997, now seen corresponding path program 64 times [2021-11-09 09:13:43,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:13:43,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736516554] [2021-11-09 09:13:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:13:43,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:13:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:43,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:13:43,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736516554] [2021-11-09 09:13:43,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736516554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:43,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072148402] [2021-11-09 09:13:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:13:43,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:43,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:13:43,711 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:13:43,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 09:13:47,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:13:47,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:13:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:13:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:13:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:48,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072148402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:48,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:13:48,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:13:48,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995388001] [2021-11-09 09:13:48,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:13:48,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:13:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:13:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:13:48,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:13:48,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 1061 transitions, 23212 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:48,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:13:48,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:13:48,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:13:51,154 INFO L129 PetriNetUnfolder]: 1445/3885 cut-off events. [2021-11-09 09:13:51,154 INFO L130 PetriNetUnfolder]: For 131017/131017 co-relation queries the response was YES. [2021-11-09 09:13:51,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34612 conditions, 3885 events. 1445/3885 cut-off events. For 131017/131017 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 35260 event pairs, 327 based on Foata normal form. 2/3884 useless extension candidates. Maximal degree in co-relation 34394. Up to 2483 conditions per place. [2021-11-09 09:13:51,272 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 948 selfloop transitions, 139 changer transitions 6/1129 dead transitions. [2021-11-09 09:13:51,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 1129 transitions, 26437 flow [2021-11-09 09:13:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:13:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:13:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 859 transitions. [2021-11-09 09:13:51,274 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6478129713423831 [2021-11-09 09:13:51,274 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 859 transitions. [2021-11-09 09:13:51,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 859 transitions. [2021-11-09 09:13:51,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:13:51,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 859 transitions. [2021-11-09 09:13:51,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 50.529411764705884) internal successors, (859), 17 states have internal predecessors, (859), 0 states have call successors, (0), 0 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 09:13:51,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:13:51,276 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:13:51,276 INFO L186 Difference]: Start difference. First operand has 671 places, 1061 transitions, 23212 flow. Second operand 17 states and 859 transitions. [2021-11-09 09:13:51,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 1129 transitions, 26437 flow [2021-11-09 09:13:52,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 1129 transitions, 26115 flow, removed 17 selfloop flow, removed 18 redundant places. [2021-11-09 09:13:52,849 INFO L242 Difference]: Finished difference. Result has 668 places, 1068 transitions, 23450 flow [2021-11-09 09:13:52,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=22931, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23450, PETRI_PLACES=668, PETRI_TRANSITIONS=1068} [2021-11-09 09:13:52,850 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 599 predicate places. [2021-11-09 09:13:52,850 INFO L470 AbstractCegarLoop]: Abstraction has has 668 places, 1068 transitions, 23450 flow [2021-11-09 09:13:52,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:13:52,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:13:52,850 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:13:52,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-09 09:13:53,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-09 09:13:53,051 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:13:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:13:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash -849970015, now seen corresponding path program 65 times [2021-11-09 09:13:53,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:13:53,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149340383] [2021-11-09 09:13:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:13:53,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:13:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:13:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:53,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:13:53,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149340383] [2021-11-09 09:13:53,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149340383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:53,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752437393] [2021-11-09 09:13:53,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:13:53,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:13:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:13:53,356 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:13:53,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 09:13:56,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 09:13:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:13:56,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:13:56,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:13:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:13:57,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752437393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:13:57,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:13:57,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:13:57,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120267690] [2021-11-09 09:13:57,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:13:57,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:13:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:13:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:13:57,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:13:57,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 1068 transitions, 23450 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:13:57,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:13:57,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:13:57,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:14:01,212 INFO L129 PetriNetUnfolder]: 1516/4095 cut-off events. [2021-11-09 09:14:01,212 INFO L130 PetriNetUnfolder]: For 139979/139979 co-relation queries the response was YES. [2021-11-09 09:14:01,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36989 conditions, 4095 events. 1516/4095 cut-off events. For 139979/139979 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 37598 event pairs, 379 based on Foata normal form. 4/4096 useless extension candidates. Maximal degree in co-relation 36770. Up to 2232 conditions per place. [2021-11-09 09:14:01,338 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 909 selfloop transitions, 230 changer transitions 4/1179 dead transitions. [2021-11-09 09:14:01,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 1179 transitions, 28543 flow [2021-11-09 09:14:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:14:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 09:14:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 890 transitions. [2021-11-09 09:14:01,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6339031339031339 [2021-11-09 09:14:01,339 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 890 transitions. [2021-11-09 09:14:01,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 890 transitions. [2021-11-09 09:14:01,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:14:01,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 890 transitions. [2021-11-09 09:14:01,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 49.44444444444444) internal successors, (890), 18 states have internal predecessors, (890), 0 states have call successors, (0), 0 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 09:14:01,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:14:01,342 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:14:01,342 INFO L186 Difference]: Start difference. First operand has 668 places, 1068 transitions, 23450 flow. Second operand 18 states and 890 transitions. [2021-11-09 09:14:01,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 1179 transitions, 28543 flow [2021-11-09 09:14:02,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 1179 transitions, 28194 flow, removed 51 selfloop flow, removed 14 redundant places. [2021-11-09 09:14:03,000 INFO L242 Difference]: Finished difference. Result has 677 places, 1142 transitions, 25831 flow [2021-11-09 09:14:03,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=23185, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=877, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25831, PETRI_PLACES=677, PETRI_TRANSITIONS=1142} [2021-11-09 09:14:03,001 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 608 predicate places. [2021-11-09 09:14:03,002 INFO L470 AbstractCegarLoop]: Abstraction has has 677 places, 1142 transitions, 25831 flow [2021-11-09 09:14:03,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:14:03,002 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:14:03,002 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:14:03,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-09 09:14:03,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 09:14:03,214 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:14:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:14:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash -477956751, now seen corresponding path program 66 times [2021-11-09 09:14:03,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:14:03,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872806117] [2021-11-09 09:14:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:14:03,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:14:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:14:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:03,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:14:03,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872806117] [2021-11-09 09:14:03,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872806117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:03,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024551765] [2021-11-09 09:14:03,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:14:03,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:03,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:14:03,482 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:14:03,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 09:14:06,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:14:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:14:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:14:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:14:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024551765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:07,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:14:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:14:07,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065568391] [2021-11-09 09:14:07,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:14:07,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:14:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:14:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:14:07,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:14:07,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 1142 transitions, 25831 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:07,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:14:07,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:14:07,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:14:11,139 INFO L129 PetriNetUnfolder]: 1516/4061 cut-off events. [2021-11-09 09:14:11,139 INFO L130 PetriNetUnfolder]: For 145883/145883 co-relation queries the response was YES. [2021-11-09 09:14:11,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37620 conditions, 4061 events. 1516/4061 cut-off events. For 145883/145883 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 37307 event pairs, 377 based on Foata normal form. 2/4060 useless extension candidates. Maximal degree in co-relation 37395. Up to 2621 conditions per place. [2021-11-09 09:14:11,263 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 987 selfloop transitions, 130 changer transitions 15/1168 dead transitions. [2021-11-09 09:14:11,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1168 transitions, 28561 flow [2021-11-09 09:14:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:14:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:14:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 793 transitions. [2021-11-09 09:14:11,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2021-11-09 09:14:11,265 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 793 transitions. [2021-11-09 09:14:11,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 793 transitions. [2021-11-09 09:14:11,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:14:11,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 793 transitions. [2021-11-09 09:14:11,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 49.5625) internal successors, (793), 16 states have internal predecessors, (793), 0 states have call successors, (0), 0 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 09:14:11,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:14:11,268 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:14:11,268 INFO L186 Difference]: Start difference. First operand has 677 places, 1142 transitions, 25831 flow. Second operand 16 states and 793 transitions. [2021-11-09 09:14:11,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1168 transitions, 28561 flow [2021-11-09 09:14:12,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 1168 transitions, 27965 flow, removed 146 selfloop flow, removed 11 redundant places. [2021-11-09 09:14:12,824 INFO L242 Difference]: Finished difference. Result has 682 places, 1133 transitions, 25362 flow [2021-11-09 09:14:12,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=25301, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25362, PETRI_PLACES=682, PETRI_TRANSITIONS=1133} [2021-11-09 09:14:12,825 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 613 predicate places. [2021-11-09 09:14:12,825 INFO L470 AbstractCegarLoop]: Abstraction has has 682 places, 1133 transitions, 25362 flow [2021-11-09 09:14:12,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:12,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:14:12,825 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:14:12,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 09:14:13,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-09 09:14:13,026 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:14:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:14:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 575040657, now seen corresponding path program 67 times [2021-11-09 09:14:13,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:14:13,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269991849] [2021-11-09 09:14:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:14:13,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:14:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:14:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:13,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:14:13,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269991849] [2021-11-09 09:14:13,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269991849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:13,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668268591] [2021-11-09 09:14:13,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:14:13,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:13,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:14:13,406 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:14:13,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 09:14:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:14:16,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:14:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:14:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:17,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668268591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:17,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:14:17,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:14:17,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624081727] [2021-11-09 09:14:17,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:14:17,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:14:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:14:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:14:17,103 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:14:17,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 1133 transitions, 25362 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:17,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:14:17,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:14:17,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:14:20,148 INFO L129 PetriNetUnfolder]: 1511/4018 cut-off events. [2021-11-09 09:14:20,148 INFO L130 PetriNetUnfolder]: For 144668/144668 co-relation queries the response was YES. [2021-11-09 09:14:20,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37090 conditions, 4018 events. 1511/4018 cut-off events. For 144668/144668 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 36653 event pairs, 375 based on Foata normal form. 2/4017 useless extension candidates. Maximal degree in co-relation 36865. Up to 2640 conditions per place. [2021-11-09 09:14:20,245 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1004 selfloop transitions, 167 changer transitions 4/1211 dead transitions. [2021-11-09 09:14:20,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 1211 transitions, 29021 flow [2021-11-09 09:14:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:14:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:14:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 846 transitions. [2021-11-09 09:14:20,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6380090497737556 [2021-11-09 09:14:20,246 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 846 transitions. [2021-11-09 09:14:20,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 846 transitions. [2021-11-09 09:14:20,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:14:20,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 846 transitions. [2021-11-09 09:14:20,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 49.76470588235294) internal successors, (846), 17 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:14:20,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:14:20,249 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:14:20,249 INFO L186 Difference]: Start difference. First operand has 682 places, 1133 transitions, 25362 flow. Second operand 17 states and 846 transitions. [2021-11-09 09:14:20,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 1211 transitions, 29021 flow [2021-11-09 09:14:21,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 1211 transitions, 28717 flow, removed 16 selfloop flow, removed 14 redundant places. [2021-11-09 09:14:21,568 INFO L242 Difference]: Finished difference. Result has 685 places, 1169 transitions, 26238 flow [2021-11-09 09:14:21,569 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=25070, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=973, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=26238, PETRI_PLACES=685, PETRI_TRANSITIONS=1169} [2021-11-09 09:14:21,569 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 616 predicate places. [2021-11-09 09:14:21,569 INFO L470 AbstractCegarLoop]: Abstraction has has 685 places, 1169 transitions, 26238 flow [2021-11-09 09:14:21,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:21,570 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:14:21,570 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:14:21,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 09:14:21,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-09 09:14:21,770 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:14:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:14:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1779030817, now seen corresponding path program 68 times [2021-11-09 09:14:21,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:14:21,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368895410] [2021-11-09 09:14:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:14:21,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:14:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:14:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:22,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:14:22,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368895410] [2021-11-09 09:14:22,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368895410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:22,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247705444] [2021-11-09 09:14:22,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:14:22,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:14:22,195 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:14:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 09:14:25,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:14:25,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:14:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:14:25,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:14:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:26,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247705444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:26,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:14:26,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:14:26,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46841579] [2021-11-09 09:14:26,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:14:26,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:14:26,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:14:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:14:26,061 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:14:26,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1169 transitions, 26238 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:26,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:14:26,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:14:26,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:14:29,115 INFO L129 PetriNetUnfolder]: 1511/3989 cut-off events. [2021-11-09 09:14:29,115 INFO L130 PetriNetUnfolder]: For 146039/146039 co-relation queries the response was YES. [2021-11-09 09:14:29,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37215 conditions, 3989 events. 1511/3989 cut-off events. For 146039/146039 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36273 event pairs, 328 based on Foata normal form. 2/3988 useless extension candidates. Maximal degree in co-relation 36988. Up to 2556 conditions per place. [2021-11-09 09:14:29,428 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 993 selfloop transitions, 184 changer transitions 5/1218 dead transitions. [2021-11-09 09:14:29,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 1218 transitions, 29296 flow [2021-11-09 09:14:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:14:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:14:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 812 transitions. [2021-11-09 09:14:29,429 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6506410256410257 [2021-11-09 09:14:29,429 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 812 transitions. [2021-11-09 09:14:29,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 812 transitions. [2021-11-09 09:14:29,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:14:29,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 812 transitions. [2021-11-09 09:14:29,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 50.75) internal successors, (812), 16 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 09:14:29,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:14:29,432 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:14:29,432 INFO L186 Difference]: Start difference. First operand has 685 places, 1169 transitions, 26238 flow. Second operand 16 states and 812 transitions. [2021-11-09 09:14:29,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 1218 transitions, 29296 flow [2021-11-09 09:14:30,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 1218 transitions, 29074 flow, removed 61 selfloop flow, removed 9 redundant places. [2021-11-09 09:14:30,791 INFO L242 Difference]: Finished difference. Result has 692 places, 1172 transitions, 26581 flow [2021-11-09 09:14:30,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=26032, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=987, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=26581, PETRI_PLACES=692, PETRI_TRANSITIONS=1172} [2021-11-09 09:14:30,792 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 623 predicate places. [2021-11-09 09:14:30,792 INFO L470 AbstractCegarLoop]: Abstraction has has 692 places, 1172 transitions, 26581 flow [2021-11-09 09:14:30,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:30,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:14:30,792 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:14:30,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-09 09:14:30,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:30,993 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:14:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:14:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 394824725, now seen corresponding path program 69 times [2021-11-09 09:14:30,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:14:30,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896486509] [2021-11-09 09:14:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:14:30,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:14:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:14:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:31,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:14:31,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896486509] [2021-11-09 09:14:31,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896486509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:31,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41831429] [2021-11-09 09:14:31,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:14:31,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:14:31,245 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:14:31,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 09:14:34,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:14:34,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:14:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:14:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:14:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:35,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41831429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:35,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:14:35,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:14:35,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614312240] [2021-11-09 09:14:35,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:14:35,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:14:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:14:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:14:35,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:14:35,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1172 transitions, 26581 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:35,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:14:35,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:14:35,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:14:38,648 INFO L129 PetriNetUnfolder]: 1507/3939 cut-off events. [2021-11-09 09:14:38,648 INFO L130 PetriNetUnfolder]: For 147772/147772 co-relation queries the response was YES. [2021-11-09 09:14:38,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37327 conditions, 3939 events. 1507/3939 cut-off events. For 147772/147772 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 35623 event pairs, 366 based on Foata normal form. 1/3937 useless extension candidates. Maximal degree in co-relation 37098. Up to 2556 conditions per place. [2021-11-09 09:14:38,773 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1039 selfloop transitions, 125 changer transitions 11/1211 dead transitions. [2021-11-09 09:14:38,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 1211 transitions, 29534 flow [2021-11-09 09:14:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:14:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:14:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 799 transitions. [2021-11-09 09:14:38,775 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6402243589743589 [2021-11-09 09:14:38,775 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 799 transitions. [2021-11-09 09:14:38,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 799 transitions. [2021-11-09 09:14:38,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:14:38,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 799 transitions. [2021-11-09 09:14:38,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 49.9375) internal successors, (799), 16 states have internal predecessors, (799), 0 states have call successors, (0), 0 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 09:14:38,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:14:38,777 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:14:38,777 INFO L186 Difference]: Start difference. First operand has 692 places, 1172 transitions, 26581 flow. Second operand 16 states and 799 transitions. [2021-11-09 09:14:38,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 1211 transitions, 29534 flow [2021-11-09 09:14:40,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 1211 transitions, 29124 flow, removed 49 selfloop flow, removed 15 redundant places. [2021-11-09 09:14:40,634 INFO L242 Difference]: Finished difference. Result has 692 places, 1167 transitions, 26370 flow [2021-11-09 09:14:40,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=26221, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=26370, PETRI_PLACES=692, PETRI_TRANSITIONS=1167} [2021-11-09 09:14:40,636 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 623 predicate places. [2021-11-09 09:14:40,636 INFO L470 AbstractCegarLoop]: Abstraction has has 692 places, 1167 transitions, 26370 flow [2021-11-09 09:14:40,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:40,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:14:40,637 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:14:40,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-09 09:14:40,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:40,862 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:14:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:14:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1251307699, now seen corresponding path program 70 times [2021-11-09 09:14:40,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:14:40,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394770960] [2021-11-09 09:14:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:14:40,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:14:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:14:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:41,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:14:41,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394770960] [2021-11-09 09:14:41,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394770960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:41,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020370738] [2021-11-09 09:14:41,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:14:41,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:41,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:14:41,131 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:14:41,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-09 09:14:44,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:14:44,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:14:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:14:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:14:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:45,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020370738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:45,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:14:45,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:14:45,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859793468] [2021-11-09 09:14:45,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:14:45,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:14:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:14:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:14:45,299 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:14:45,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1167 transitions, 26370 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:45,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:14:45,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:14:45,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:14:49,284 INFO L129 PetriNetUnfolder]: 1504/3905 cut-off events. [2021-11-09 09:14:49,284 INFO L130 PetriNetUnfolder]: For 144517/144517 co-relation queries the response was YES. [2021-11-09 09:14:49,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37003 conditions, 3905 events. 1504/3905 cut-off events. For 144517/144517 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35127 event pairs, 332 based on Foata normal form. 2/3904 useless extension candidates. Maximal degree in co-relation 36774. Up to 2698 conditions per place. [2021-11-09 09:14:49,413 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1013 selfloop transitions, 169 changer transitions 9/1227 dead transitions. [2021-11-09 09:14:49,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1227 transitions, 29831 flow [2021-11-09 09:14:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:14:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:14:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1134 transitions. [2021-11-09 09:14:49,415 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6321070234113713 [2021-11-09 09:14:49,415 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1134 transitions. [2021-11-09 09:14:49,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1134 transitions. [2021-11-09 09:14:49,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:14:49,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1134 transitions. [2021-11-09 09:14:49,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 49.30434782608695) internal successors, (1134), 23 states have internal predecessors, (1134), 0 states have call successors, (0), 0 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 09:14:49,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:14:49,417 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:14:49,418 INFO L186 Difference]: Start difference. First operand has 692 places, 1167 transitions, 26370 flow. Second operand 23 states and 1134 transitions. [2021-11-09 09:14:49,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1227 transitions, 29831 flow [2021-11-09 09:14:51,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1227 transitions, 29584 flow, removed 11 selfloop flow, removed 14 redundant places. [2021-11-09 09:14:51,199 INFO L242 Difference]: Finished difference. Result has 698 places, 1169 transitions, 26552 flow [2021-11-09 09:14:51,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=26135, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26552, PETRI_PLACES=698, PETRI_TRANSITIONS=1169} [2021-11-09 09:14:51,200 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 629 predicate places. [2021-11-09 09:14:51,201 INFO L470 AbstractCegarLoop]: Abstraction has has 698 places, 1169 transitions, 26552 flow [2021-11-09 09:14:51,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:51,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:14:51,201 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:14:51,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-09 09:14:51,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-09 09:14:51,402 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:14:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:14:51,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1575126847, now seen corresponding path program 71 times [2021-11-09 09:14:51,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:14:51,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41654555] [2021-11-09 09:14:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:14:51,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:14:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:14:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:51,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:14:51,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41654555] [2021-11-09 09:14:51,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41654555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:51,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758988028] [2021-11-09 09:14:51,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:14:51,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:14:51,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:14:51,696 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:14:51,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-09 09:14:55,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:14:55,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:14:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:14:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:14:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:14:55,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758988028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:14:55,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:14:55,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:14:55,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151018376] [2021-11-09 09:14:55,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:14:55,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:14:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:14:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:14:55,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:14:55,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 1169 transitions, 26552 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:14:55,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:14:55,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:14:55,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:14:59,080 INFO L129 PetriNetUnfolder]: 1500/3845 cut-off events. [2021-11-09 09:14:59,080 INFO L130 PetriNetUnfolder]: For 144501/144501 co-relation queries the response was YES. [2021-11-09 09:14:59,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36919 conditions, 3845 events. 1500/3845 cut-off events. For 144501/144501 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34360 event pairs, 335 based on Foata normal form. 1/3843 useless extension candidates. Maximal degree in co-relation 36691. Up to 2628 conditions per place. [2021-11-09 09:14:59,187 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 969 selfloop transitions, 209 changer transitions 7/1221 dead transitions. [2021-11-09 09:14:59,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 1221 transitions, 29761 flow [2021-11-09 09:14:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:14:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:14:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1135 transitions. [2021-11-09 09:14:59,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.632664437012263 [2021-11-09 09:14:59,188 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1135 transitions. [2021-11-09 09:14:59,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1135 transitions. [2021-11-09 09:14:59,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:14:59,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1135 transitions. [2021-11-09 09:14:59,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 49.34782608695652) internal successors, (1135), 23 states have internal predecessors, (1135), 0 states have call successors, (0), 0 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 09:14:59,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:14:59,191 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:14:59,191 INFO L186 Difference]: Start difference. First operand has 698 places, 1169 transitions, 26552 flow. Second operand 23 states and 1135 transitions. [2021-11-09 09:14:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 1221 transitions, 29761 flow [2021-11-09 09:15:00,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1221 transitions, 29473 flow, removed 26 selfloop flow, removed 17 redundant places. [2021-11-09 09:15:00,770 INFO L242 Difference]: Finished difference. Result has 702 places, 1173 transitions, 26813 flow [2021-11-09 09:15:00,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=26292, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26813, PETRI_PLACES=702, PETRI_TRANSITIONS=1173} [2021-11-09 09:15:00,771 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 633 predicate places. [2021-11-09 09:15:00,771 INFO L470 AbstractCegarLoop]: Abstraction has has 702 places, 1173 transitions, 26813 flow [2021-11-09 09:15:00,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:00,771 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:15:00,771 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:15:00,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-09 09:15:00,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:00,972 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:15:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:15:00,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1240172317, now seen corresponding path program 72 times [2021-11-09 09:15:00,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:15:00,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610190501] [2021-11-09 09:15:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:15:00,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:15:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:01,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:15:01,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610190501] [2021-11-09 09:15:01,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610190501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:01,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270435401] [2021-11-09 09:15:01,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:15:01,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:01,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:15:01,247 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:15:01,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-09 09:15:04,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:15:04,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:15:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:15:04,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:15:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:05,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270435401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:05,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:15:05,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:15:05,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688759088] [2021-11-09 09:15:05,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:15:05,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:15:05,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:15:05,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:15:05,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:15:05,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 1173 transitions, 26813 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:05,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:15:05,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:15:05,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:15:08,731 INFO L129 PetriNetUnfolder]: 1549/3993 cut-off events. [2021-11-09 09:15:08,731 INFO L130 PetriNetUnfolder]: For 150606/150606 co-relation queries the response was YES. [2021-11-09 09:15:08,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38205 conditions, 3993 events. 1549/3993 cut-off events. For 150606/150606 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36081 event pairs, 373 based on Foata normal form. 1/3991 useless extension candidates. Maximal degree in co-relation 37977. Up to 2726 conditions per place. [2021-11-09 09:15:08,843 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1043 selfloop transitions, 176 changer transitions 4/1259 dead transitions. [2021-11-09 09:15:08,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 1259 transitions, 30866 flow [2021-11-09 09:15:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:15:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:15:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 844 transitions. [2021-11-09 09:15:08,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365007541478129 [2021-11-09 09:15:08,845 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 844 transitions. [2021-11-09 09:15:08,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 844 transitions. [2021-11-09 09:15:08,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:15:08,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 844 transitions. [2021-11-09 09:15:08,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 49.64705882352941) internal successors, (844), 17 states have internal predecessors, (844), 0 states have call successors, (0), 0 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 09:15:08,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:15:08,847 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:15:08,847 INFO L186 Difference]: Start difference. First operand has 702 places, 1173 transitions, 26813 flow. Second operand 17 states and 844 transitions. [2021-11-09 09:15:08,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 1259 transitions, 30866 flow [2021-11-09 09:15:10,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1259 transitions, 30499 flow, removed 17 selfloop flow, removed 19 redundant places. [2021-11-09 09:15:10,349 INFO L242 Difference]: Finished difference. Result has 702 places, 1225 transitions, 28122 flow [2021-11-09 09:15:10,350 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=26456, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=28122, PETRI_PLACES=702, PETRI_TRANSITIONS=1225} [2021-11-09 09:15:10,350 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 633 predicate places. [2021-11-09 09:15:10,350 INFO L470 AbstractCegarLoop]: Abstraction has has 702 places, 1225 transitions, 28122 flow [2021-11-09 09:15:10,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:10,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:15:10,351 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:15:10,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-09 09:15:10,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:10,551 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:15:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:15:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash -681250913, now seen corresponding path program 73 times [2021-11-09 09:15:10,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:15:10,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107295435] [2021-11-09 09:15:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:15:10,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:15:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:10,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:15:10,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107295435] [2021-11-09 09:15:10,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107295435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:10,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67553887] [2021-11-09 09:15:10,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:15:10,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:10,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:15:10,906 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:15:10,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-09 09:15:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:15:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:15:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:14,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67553887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:14,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:15:14,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:15:14,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116859646] [2021-11-09 09:15:14,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:15:14,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:15:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:15:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:15:14,720 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:15:14,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 1225 transitions, 28122 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:14,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:15:14,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:15:14,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:15:17,807 INFO L129 PetriNetUnfolder]: 1547/3985 cut-off events. [2021-11-09 09:15:17,808 INFO L130 PetriNetUnfolder]: For 153387/153387 co-relation queries the response was YES. [2021-11-09 09:15:17,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38409 conditions, 3985 events. 1547/3985 cut-off events. For 153387/153387 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35893 event pairs, 350 based on Foata normal form. 2/3984 useless extension candidates. Maximal degree in co-relation 38177. Up to 2642 conditions per place. [2021-11-09 09:15:17,906 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1051 selfloop transitions, 180 changer transitions 7/1274 dead transitions. [2021-11-09 09:15:17,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1274 transitions, 31367 flow [2021-11-09 09:15:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:15:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 09:15:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 901 transitions. [2021-11-09 09:15:17,907 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6417378917378918 [2021-11-09 09:15:17,907 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 901 transitions. [2021-11-09 09:15:17,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 901 transitions. [2021-11-09 09:15:17,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:15:17,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 901 transitions. [2021-11-09 09:15:17,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 50.05555555555556) internal successors, (901), 18 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 09:15:17,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:15:17,909 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 78.0) internal successors, (1482), 19 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 09:15:17,909 INFO L186 Difference]: Start difference. First operand has 702 places, 1225 transitions, 28122 flow. Second operand 18 states and 901 transitions. [2021-11-09 09:15:17,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1274 transitions, 31367 flow [2021-11-09 09:15:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 1274 transitions, 31179 flow, removed 47 selfloop flow, removed 10 redundant places. [2021-11-09 09:15:19,331 INFO L242 Difference]: Finished difference. Result has 711 places, 1226 transitions, 28439 flow [2021-11-09 09:15:19,332 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=27944, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=28439, PETRI_PLACES=711, PETRI_TRANSITIONS=1226} [2021-11-09 09:15:19,333 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 642 predicate places. [2021-11-09 09:15:19,333 INFO L470 AbstractCegarLoop]: Abstraction has has 711 places, 1226 transitions, 28439 flow [2021-11-09 09:15:19,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:19,333 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:15:19,333 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:15:19,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-09 09:15:19,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-09 09:15:19,534 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:15:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:15:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1513114915, now seen corresponding path program 74 times [2021-11-09 09:15:19,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:15:19,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153645697] [2021-11-09 09:15:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:15:19,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:15:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:19,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:15:19,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153645697] [2021-11-09 09:15:19,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153645697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:19,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283961315] [2021-11-09 09:15:19,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:15:19,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:19,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:15:19,920 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:15:19,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-09 09:15:23,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:15:23,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:15:23,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:15:23,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:15:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:23,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283961315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:23,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:15:23,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:15:23,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149436330] [2021-11-09 09:15:23,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:15:23,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:15:23,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:15:23,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:15:23,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:15:23,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 1226 transitions, 28439 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:23,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:15:23,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:15:23,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:15:27,091 INFO L129 PetriNetUnfolder]: 1546/3979 cut-off events. [2021-11-09 09:15:27,091 INFO L130 PetriNetUnfolder]: For 155630/155630 co-relation queries the response was YES. [2021-11-09 09:15:27,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38626 conditions, 3979 events. 1546/3979 cut-off events. For 155630/155630 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35899 event pairs, 355 based on Foata normal form. 2/3978 useless extension candidates. Maximal degree in co-relation 38391. Up to 2692 conditions per place. [2021-11-09 09:15:27,186 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1043 selfloop transitions, 194 changer transitions 6/1279 dead transitions. [2021-11-09 09:15:27,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 1279 transitions, 32042 flow [2021-11-09 09:15:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:15:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-09 09:15:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1093 transitions. [2021-11-09 09:15:27,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6369463869463869 [2021-11-09 09:15:27,188 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1093 transitions. [2021-11-09 09:15:27,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1093 transitions. [2021-11-09 09:15:27,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:15:27,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1093 transitions. [2021-11-09 09:15:27,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.68181818181818) internal successors, (1093), 22 states have internal predecessors, (1093), 0 states have call successors, (0), 0 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 09:15:27,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:15:27,190 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 78.0) internal successors, (1794), 23 states have internal predecessors, (1794), 0 states have call successors, (0), 0 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 09:15:27,190 INFO L186 Difference]: Start difference. First operand has 711 places, 1226 transitions, 28439 flow. Second operand 22 states and 1093 transitions. [2021-11-09 09:15:27,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 1279 transitions, 32042 flow [2021-11-09 09:15:28,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 1279 transitions, 31638 flow, removed 94 selfloop flow, removed 13 redundant places. [2021-11-09 09:15:28,620 INFO L242 Difference]: Finished difference. Result has 721 places, 1231 transitions, 28808 flow [2021-11-09 09:15:28,621 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=28140, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=28808, PETRI_PLACES=721, PETRI_TRANSITIONS=1231} [2021-11-09 09:15:28,621 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 652 predicate places. [2021-11-09 09:15:28,621 INFO L470 AbstractCegarLoop]: Abstraction has has 721 places, 1231 transitions, 28808 flow [2021-11-09 09:15:28,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:28,621 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:15:28,622 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:15:28,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-09 09:15:28,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-09 09:15:28,822 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:15:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:15:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1905659895, now seen corresponding path program 75 times [2021-11-09 09:15:28,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:15:28,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011080370] [2021-11-09 09:15:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:15:28,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:15:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:29,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:15:29,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011080370] [2021-11-09 09:15:29,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011080370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:29,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841308798] [2021-11-09 09:15:29,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:15:29,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:15:29,197 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:15:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-09 09:15:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:15:32,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:15:32,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:15:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:15:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:33,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841308798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:33,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:15:33,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:15:33,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583686195] [2021-11-09 09:15:33,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:15:33,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:15:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:15:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:15:33,093 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:15:33,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 1231 transitions, 28808 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:33,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:15:33,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:15:33,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:15:36,281 INFO L129 PetriNetUnfolder]: 1544/3936 cut-off events. [2021-11-09 09:15:36,281 INFO L130 PetriNetUnfolder]: For 154910/154910 co-relation queries the response was YES. [2021-11-09 09:15:36,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38521 conditions, 3936 events. 1544/3936 cut-off events. For 154910/154910 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 35321 event pairs, 358 based on Foata normal form. 1/3934 useless extension candidates. Maximal degree in co-relation 38284. Up to 2641 conditions per place. [2021-11-09 09:15:36,397 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1019 selfloop transitions, 215 changer transitions 7/1277 dead transitions. [2021-11-09 09:15:36,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1277 transitions, 32029 flow [2021-11-09 09:15:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:15:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-09 09:15:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 993 transitions. [2021-11-09 09:15:36,398 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365384615384615 [2021-11-09 09:15:36,398 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 993 transitions. [2021-11-09 09:15:36,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 993 transitions. [2021-11-09 09:15:36,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:15:36,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 993 transitions. [2021-11-09 09:15:36,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 49.65) internal successors, (993), 20 states have internal predecessors, (993), 0 states have call successors, (0), 0 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 09:15:36,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:15:36,401 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 09:15:36,401 INFO L186 Difference]: Start difference. First operand has 721 places, 1231 transitions, 28808 flow. Second operand 20 states and 993 transitions. [2021-11-09 09:15:36,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1277 transitions, 32029 flow [2021-11-09 09:15:37,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 1277 transitions, 31737 flow, removed 74 selfloop flow, removed 11 redundant places. [2021-11-09 09:15:37,942 INFO L242 Difference]: Finished difference. Result has 730 places, 1234 transitions, 29075 flow [2021-11-09 09:15:37,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=28538, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=29075, PETRI_PLACES=730, PETRI_TRANSITIONS=1234} [2021-11-09 09:15:37,944 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 661 predicate places. [2021-11-09 09:15:37,944 INFO L470 AbstractCegarLoop]: Abstraction has has 730 places, 1234 transitions, 29075 flow [2021-11-09 09:15:37,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:37,944 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:15:37,944 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:15:37,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-09 09:15:38,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:38,145 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:15:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:15:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1722724703, now seen corresponding path program 76 times [2021-11-09 09:15:38,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:15:38,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578570030] [2021-11-09 09:15:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:15:38,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:15:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:38,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:15:38,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578570030] [2021-11-09 09:15:38,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578570030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:38,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125122870] [2021-11-09 09:15:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:15:38,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:15:38,480 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:15:38,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-09 09:15:41,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:15:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:15:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:15:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:15:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:42,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125122870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:42,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:15:42,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:15:42,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088141202] [2021-11-09 09:15:42,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:15:42,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:15:42,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:15:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:15:42,440 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:15:42,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 1234 transitions, 29075 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:42,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:15:42,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:15:42,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:15:45,630 INFO L129 PetriNetUnfolder]: 1567/4021 cut-off events. [2021-11-09 09:15:45,630 INFO L130 PetriNetUnfolder]: For 159111/159111 co-relation queries the response was YES. [2021-11-09 09:15:45,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39263 conditions, 4021 events. 1567/4021 cut-off events. For 159111/159111 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36304 event pairs, 341 based on Foata normal form. 2/4020 useless extension candidates. Maximal degree in co-relation 39025. Up to 2683 conditions per place. [2021-11-09 09:15:45,752 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1097 selfloop transitions, 146 changer transitions 6/1285 dead transitions. [2021-11-09 09:15:45,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 1285 transitions, 32382 flow [2021-11-09 09:15:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:15:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:15:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 857 transitions. [2021-11-09 09:15:45,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6463046757164405 [2021-11-09 09:15:45,753 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 857 transitions. [2021-11-09 09:15:45,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 857 transitions. [2021-11-09 09:15:45,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:15:45,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 857 transitions. [2021-11-09 09:15:45,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 50.411764705882355) internal successors, (857), 17 states have internal predecessors, (857), 0 states have call successors, (0), 0 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 09:15:45,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:15:45,756 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:15:45,756 INFO L186 Difference]: Start difference. First operand has 730 places, 1234 transitions, 29075 flow. Second operand 17 states and 857 transitions. [2021-11-09 09:15:45,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 1285 transitions, 32382 flow [2021-11-09 09:15:47,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 1285 transitions, 31934 flow, removed 27 selfloop flow, removed 19 redundant places. [2021-11-09 09:15:47,345 INFO L242 Difference]: Finished difference. Result has 727 places, 1242 transitions, 29210 flow [2021-11-09 09:15:47,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=28651, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1088, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=29210, PETRI_PLACES=727, PETRI_TRANSITIONS=1242} [2021-11-09 09:15:47,346 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 658 predicate places. [2021-11-09 09:15:47,346 INFO L470 AbstractCegarLoop]: Abstraction has has 727 places, 1242 transitions, 29210 flow [2021-11-09 09:15:47,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:47,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:15:47,347 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:15:47,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-09 09:15:47,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:47,547 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:15:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:15:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash -942373025, now seen corresponding path program 77 times [2021-11-09 09:15:47,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:15:47,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632811904] [2021-11-09 09:15:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:15:47,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:15:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:47,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:15:47,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632811904] [2021-11-09 09:15:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632811904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:47,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744325691] [2021-11-09 09:15:47,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:15:47,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:15:47,930 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:15:47,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-09 09:15:51,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:15:51,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:15:51,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:15:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:15:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:52,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744325691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:52,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:15:52,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:15:52,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869373804] [2021-11-09 09:15:52,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:15:52,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:15:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:15:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:15:52,321 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:15:52,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 1242 transitions, 29210 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:52,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:15:52,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:15:52,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:15:55,600 INFO L129 PetriNetUnfolder]: 1567/3989 cut-off events. [2021-11-09 09:15:55,600 INFO L130 PetriNetUnfolder]: For 159655/159655 co-relation queries the response was YES. [2021-11-09 09:15:55,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39196 conditions, 3989 events. 1567/3989 cut-off events. For 159655/159655 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 35907 event pairs, 352 based on Foata normal form. 1/3987 useless extension candidates. Maximal degree in co-relation 38959. Up to 2747 conditions per place. [2021-11-09 09:15:55,705 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1073 selfloop transitions, 166 changer transitions 7/1282 dead transitions. [2021-11-09 09:15:55,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 1282 transitions, 32410 flow [2021-11-09 09:15:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:15:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:15:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 947 transitions. [2021-11-09 09:15:55,706 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6390013495276653 [2021-11-09 09:15:55,706 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 947 transitions. [2021-11-09 09:15:55,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 947 transitions. [2021-11-09 09:15:55,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:15:55,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 947 transitions. [2021-11-09 09:15:55,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 49.8421052631579) internal successors, (947), 19 states have internal predecessors, (947), 0 states have call successors, (0), 0 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 09:15:55,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:15:55,708 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:15:55,708 INFO L186 Difference]: Start difference. First operand has 727 places, 1242 transitions, 29210 flow. Second operand 19 states and 947 transitions. [2021-11-09 09:15:55,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 1282 transitions, 32410 flow [2021-11-09 09:15:57,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 1282 transitions, 32112 flow, removed 53 selfloop flow, removed 12 redundant places. [2021-11-09 09:15:57,479 INFO L242 Difference]: Finished difference. Result has 733 places, 1240 transitions, 29279 flow [2021-11-09 09:15:57,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=28964, PETRI_DIFFERENCE_MINUEND_PLACES=712, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=29279, PETRI_PLACES=733, PETRI_TRANSITIONS=1240} [2021-11-09 09:15:57,481 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 664 predicate places. [2021-11-09 09:15:57,481 INFO L470 AbstractCegarLoop]: Abstraction has has 733 places, 1240 transitions, 29279 flow [2021-11-09 09:15:57,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:15:57,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:15:57,482 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:15:57,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-09 09:15:57,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-09 09:15:57,698 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:15:57,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:15:57,699 INFO L85 PathProgramCache]: Analyzing trace with hash -749312597, now seen corresponding path program 78 times [2021-11-09 09:15:57,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:15:57,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051532739] [2021-11-09 09:15:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:15:57,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:15:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:15:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:15:58,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:15:58,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051532739] [2021-11-09 09:15:58,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051532739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:15:58,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467407871] [2021-11-09 09:15:58,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:15:58,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:15:58,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:15:58,108 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:15:58,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-09 09:16:01,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 09:16:01,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:16:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:16:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:16:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:02,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467407871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:02,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:16:02,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:16:02,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879521632] [2021-11-09 09:16:02,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:16:02,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:16:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:16:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:16:02,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:16:02,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 1240 transitions, 29279 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:16:02,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:16:02,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:16:02,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:16:07,354 INFO L129 PetriNetUnfolder]: 1735/4503 cut-off events. [2021-11-09 09:16:07,354 INFO L130 PetriNetUnfolder]: For 174745/174745 co-relation queries the response was YES. [2021-11-09 09:16:07,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43849 conditions, 4503 events. 1735/4503 cut-off events. For 174745/174745 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41502 event pairs, 357 based on Foata normal form. 2/4502 useless extension candidates. Maximal degree in co-relation 43612. Up to 2115 conditions per place. [2021-11-09 09:16:07,506 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 994 selfloop transitions, 382 changer transitions 7/1419 dead transitions. [2021-11-09 09:16:07,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 1419 transitions, 36677 flow [2021-11-09 09:16:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:16:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-09 09:16:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1339 transitions. [2021-11-09 09:16:07,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2021-11-09 09:16:07,508 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1339 transitions. [2021-11-09 09:16:07,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1339 transitions. [2021-11-09 09:16:07,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:16:07,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1339 transitions. [2021-11-09 09:16:07,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 49.592592592592595) internal successors, (1339), 27 states have internal predecessors, (1339), 0 states have call successors, (0), 0 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 09:16:07,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:16:07,512 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 78.0) internal successors, (2184), 28 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 09:16:07,512 INFO L186 Difference]: Start difference. First operand has 733 places, 1240 transitions, 29279 flow. Second operand 27 states and 1339 transitions. [2021-11-09 09:16:07,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 1419 transitions, 36677 flow [2021-11-09 09:16:09,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1419 transitions, 36203 flow, removed 14 selfloop flow, removed 17 redundant places. [2021-11-09 09:16:09,943 INFO L242 Difference]: Finished difference. Result has 744 places, 1330 transitions, 32708 flow [2021-11-09 09:16:09,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=28941, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=32708, PETRI_PLACES=744, PETRI_TRANSITIONS=1330} [2021-11-09 09:16:09,945 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 675 predicate places. [2021-11-09 09:16:09,945 INFO L470 AbstractCegarLoop]: Abstraction has has 744 places, 1330 transitions, 32708 flow [2021-11-09 09:16:09,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:16:09,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:16:09,945 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:16:09,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-09 09:16:10,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:16:10,146 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:16:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:16:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2123391499, now seen corresponding path program 79 times [2021-11-09 09:16:10,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:16:10,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560985032] [2021-11-09 09:16:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:16:10,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:16:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:16:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:10,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:16:10,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560985032] [2021-11-09 09:16:10,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560985032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:10,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312773421] [2021-11-09 09:16:10,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:16:10,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:16:10,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:16:10,466 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:16:10,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-09 09:16:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:16:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:16:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:16:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:16,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312773421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:16,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:16:16,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:16:16,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098187976] [2021-11-09 09:16:16,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:16:16,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:16:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:16:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:16:16,050 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:16:16,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1330 transitions, 32708 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:16:16,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:16:16,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:16:16,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:16:20,287 INFO L129 PetriNetUnfolder]: 1735/4473 cut-off events. [2021-11-09 09:16:20,287 INFO L130 PetriNetUnfolder]: For 185115/185115 co-relation queries the response was YES. [2021-11-09 09:16:20,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44771 conditions, 4473 events. 1735/4473 cut-off events. For 185115/185115 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 41075 event pairs, 371 based on Foata normal form. 4/4474 useless extension candidates. Maximal degree in co-relation 44529. Up to 2817 conditions per place. [2021-11-09 09:16:20,529 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1084 selfloop transitions, 239 changer transitions 7/1366 dead transitions. [2021-11-09 09:16:20,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1366 transitions, 35965 flow [2021-11-09 09:16:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:16:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:16:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 805 transitions. [2021-11-09 09:16:20,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6450320512820513 [2021-11-09 09:16:20,532 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 805 transitions. [2021-11-09 09:16:20,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 805 transitions. [2021-11-09 09:16:20,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:16:20,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 805 transitions. [2021-11-09 09:16:20,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 50.3125) internal successors, (805), 16 states have internal predecessors, (805), 0 states have call successors, (0), 0 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 09:16:20,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:16:20,535 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:16:20,536 INFO L186 Difference]: Start difference. First operand has 744 places, 1330 transitions, 32708 flow. Second operand 16 states and 805 transitions. [2021-11-09 09:16:20,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 1366 transitions, 35965 flow [2021-11-09 09:16:22,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 1366 transitions, 34875 flow, removed 148 selfloop flow, removed 15 redundant places. [2021-11-09 09:16:22,991 INFO L242 Difference]: Finished difference. Result has 745 places, 1336 transitions, 32385 flow [2021-11-09 09:16:22,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=31640, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=32385, PETRI_PLACES=745, PETRI_TRANSITIONS=1336} [2021-11-09 09:16:22,992 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 676 predicate places. [2021-11-09 09:16:22,992 INFO L470 AbstractCegarLoop]: Abstraction has has 745 places, 1336 transitions, 32385 flow [2021-11-09 09:16:22,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:16:22,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:16:22,993 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:16:23,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-09 09:16:23,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:16:23,193 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:16:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:16:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1473668597, now seen corresponding path program 80 times [2021-11-09 09:16:23,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:16:23,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943866243] [2021-11-09 09:16:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:16:23,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:16:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:16:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:23,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:16:23,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943866243] [2021-11-09 09:16:23,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943866243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:23,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347371600] [2021-11-09 09:16:23,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:16:23,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:16:23,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:16:23,427 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:16:23,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-09 09:16:27,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:16:27,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:16:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:16:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:16:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:27,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347371600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:27,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:16:27,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-09 09:16:27,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101165037] [2021-11-09 09:16:27,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:16:27,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:16:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:16:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:16:27,833 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:16:27,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 745 places, 1336 transitions, 32385 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:16:27,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:16:27,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:16:27,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:16:31,975 INFO L129 PetriNetUnfolder]: 1727/4372 cut-off events. [2021-11-09 09:16:31,975 INFO L130 PetriNetUnfolder]: For 168610/168610 co-relation queries the response was YES. [2021-11-09 09:16:32,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43321 conditions, 4372 events. 1727/4372 cut-off events. For 168610/168610 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 39805 event pairs, 410 based on Foata normal form. 2/4371 useless extension candidates. Maximal degree in co-relation 43080. Up to 2817 conditions per place. [2021-11-09 09:16:32,124 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1138 selfloop transitions, 172 changer transitions 11/1357 dead transitions. [2021-11-09 09:16:32,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1357 transitions, 35387 flow [2021-11-09 09:16:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:16:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-09 09:16:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 792 transitions. [2021-11-09 09:16:32,126 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2021-11-09 09:16:32,126 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 792 transitions. [2021-11-09 09:16:32,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 792 transitions. [2021-11-09 09:16:32,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:16:32,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 792 transitions. [2021-11-09 09:16:32,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 49.5) internal successors, (792), 16 states have internal predecessors, (792), 0 states have call successors, (0), 0 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 09:16:32,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:16:32,128 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 78.0) internal successors, (1326), 17 states have internal predecessors, (1326), 0 states have call successors, (0), 0 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 09:16:32,128 INFO L186 Difference]: Start difference. First operand has 745 places, 1336 transitions, 32385 flow. Second operand 16 states and 792 transitions. [2021-11-09 09:16:32,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 1357 transitions, 35387 flow [2021-11-09 09:16:34,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 1357 transitions, 34837 flow, removed 56 selfloop flow, removed 16 redundant places. [2021-11-09 09:16:34,567 INFO L242 Difference]: Finished difference. Result has 744 places, 1331 transitions, 32128 flow [2021-11-09 09:16:34,569 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=31881, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=32128, PETRI_PLACES=744, PETRI_TRANSITIONS=1331} [2021-11-09 09:16:34,569 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 675 predicate places. [2021-11-09 09:16:34,570 INFO L470 AbstractCegarLoop]: Abstraction has has 744 places, 1331 transitions, 32128 flow [2021-11-09 09:16:34,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 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 09:16:34,570 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:16:34,570 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:16:34,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-09 09:16:34,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-11-09 09:16:34,786 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:16:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:16:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1769508381, now seen corresponding path program 81 times [2021-11-09 09:16:34,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:16:34,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371540104] [2021-11-09 09:16:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:16:34,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:16:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:16:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:35,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:16:35,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371540104] [2021-11-09 09:16:35,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371540104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:35,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436113857] [2021-11-09 09:16:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:16:35,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:16:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:16:35,042 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:16:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-09 09:16:39,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:16:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:16:39,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:16:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:16:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:40,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436113857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:40,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:16:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:16:40,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738985507] [2021-11-09 09:16:40,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:16:40,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:16:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:16:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:16:40,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:16:40,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1331 transitions, 32128 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:16:40,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:16:40,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:16:40,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:16:44,758 INFO L129 PetriNetUnfolder]: 1724/4318 cut-off events. [2021-11-09 09:16:44,758 INFO L130 PetriNetUnfolder]: For 162888/162888 co-relation queries the response was YES. [2021-11-09 09:16:44,864 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42807 conditions, 4318 events. 1724/4318 cut-off events. For 162888/162888 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39012 event pairs, 376 based on Foata normal form. 1/4316 useless extension candidates. Maximal degree in co-relation 42566. Up to 2115 conditions per place. [2021-11-09 09:16:44,897 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 995 selfloop transitions, 318 changer transitions 8/1357 dead transitions. [2021-11-09 09:16:44,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 1357 transitions, 35265 flow [2021-11-09 09:16:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:16:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-09 09:16:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 938 transitions. [2021-11-09 09:16:44,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6329284750337382 [2021-11-09 09:16:44,898 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 938 transitions. [2021-11-09 09:16:44,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 938 transitions. [2021-11-09 09:16:44,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:16:44,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 938 transitions. [2021-11-09 09:16:44,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 49.36842105263158) internal successors, (938), 19 states have internal predecessors, (938), 0 states have call successors, (0), 0 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 09:16:44,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:16:44,901 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 09:16:44,901 INFO L186 Difference]: Start difference. First operand has 744 places, 1331 transitions, 32128 flow. Second operand 19 states and 938 transitions. [2021-11-09 09:16:44,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 1357 transitions, 35265 flow [2021-11-09 09:16:47,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 1357 transitions, 34928 flow, removed 14 selfloop flow, removed 15 redundant places. [2021-11-09 09:16:47,209 INFO L242 Difference]: Finished difference. Result has 744 places, 1329 transitions, 32420 flow [2021-11-09 09:16:47,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=31807, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1013, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=32420, PETRI_PLACES=744, PETRI_TRANSITIONS=1329} [2021-11-09 09:16:47,211 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 675 predicate places. [2021-11-09 09:16:47,211 INFO L470 AbstractCegarLoop]: Abstraction has has 744 places, 1329 transitions, 32420 flow [2021-11-09 09:16:47,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:16:47,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:16:47,212 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:16:47,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-09 09:16:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:16:47,438 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:16:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:16:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1727263773, now seen corresponding path program 82 times [2021-11-09 09:16:47,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:16:47,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221470198] [2021-11-09 09:16:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:16:47,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:16:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:16:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:47,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:16:47,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221470198] [2021-11-09 09:16:47,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221470198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:47,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391016320] [2021-11-09 09:16:47,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:16:47,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:16:47,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:16:47,891 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:16:47,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-09 09:16:52,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:16:52,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:16:52,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:16:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:16:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:16:53,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391016320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:16:53,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:16:53,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:16:53,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269484006] [2021-11-09 09:16:53,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:16:53,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:16:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:16:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:16:53,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:16:53,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1329 transitions, 32420 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:16:53,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:16:53,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:16:53,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:16:57,988 INFO L129 PetriNetUnfolder]: 1723/4301 cut-off events. [2021-11-09 09:16:57,988 INFO L130 PetriNetUnfolder]: For 164326/164326 co-relation queries the response was YES. [2021-11-09 09:16:58,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42945 conditions, 4301 events. 1723/4301 cut-off events. For 164326/164326 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38903 event pairs, 349 based on Foata normal form. 2/4300 useless extension candidates. Maximal degree in co-relation 42706. Up to 2115 conditions per place. [2021-11-09 09:16:58,143 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 928 selfloop transitions, 445 changer transitions 5/1414 dead transitions. [2021-11-09 09:16:58,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 1414 transitions, 36922 flow [2021-11-09 09:16:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:16:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 09:16:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1286 transitions. [2021-11-09 09:16:58,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6341222879684418 [2021-11-09 09:16:58,145 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1286 transitions. [2021-11-09 09:16:58,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1286 transitions. [2021-11-09 09:16:58,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:16:58,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1286 transitions. [2021-11-09 09:16:58,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 49.46153846153846) internal successors, (1286), 26 states have internal predecessors, (1286), 0 states have call successors, (0), 0 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 09:16:58,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:16:58,148 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:16:58,148 INFO L186 Difference]: Start difference. First operand has 744 places, 1329 transitions, 32420 flow. Second operand 26 states and 1286 transitions. [2021-11-09 09:16:58,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 1414 transitions, 36922 flow [2021-11-09 09:17:00,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 1414 transitions, 36183 flow, removed 10 selfloop flow, removed 16 redundant places. [2021-11-09 09:17:00,522 INFO L242 Difference]: Finished difference. Result has 751 places, 1357 transitions, 33630 flow [2021-11-09 09:17:00,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=31697, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=33630, PETRI_PLACES=751, PETRI_TRANSITIONS=1357} [2021-11-09 09:17:00,523 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 682 predicate places. [2021-11-09 09:17:00,524 INFO L470 AbstractCegarLoop]: Abstraction has has 751 places, 1357 transitions, 33630 flow [2021-11-09 09:17:00,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:17:00,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:17:00,524 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:17:00,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-09 09:17:00,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:17:00,725 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:17:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:17:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash 964296729, now seen corresponding path program 83 times [2021-11-09 09:17:00,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:17:00,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394668837] [2021-11-09 09:17:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:17:00,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:17:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:17:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:17:00,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:17:00,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394668837] [2021-11-09 09:17:00,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394668837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:17:00,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465453963] [2021-11-09 09:17:00,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:17:00,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:17:00,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:17:00,998 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:17:00,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-09 09:17:05,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 09:17:05,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:17:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:17:05,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:17:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:17:06,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465453963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:17:06,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:17:06,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:17:06,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679863117] [2021-11-09 09:17:06,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:17:06,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:17:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:17:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:17:06,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:17:06,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 1357 transitions, 33630 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:17:06,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:17:06,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:17:06,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:17:11,348 INFO L129 PetriNetUnfolder]: 1793/4468 cut-off events. [2021-11-09 09:17:11,348 INFO L130 PetriNetUnfolder]: For 176596/176596 co-relation queries the response was YES. [2021-11-09 09:17:11,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45129 conditions, 4468 events. 1793/4468 cut-off events. For 176596/176596 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 40540 event pairs, 422 based on Foata normal form. 1/4466 useless extension candidates. Maximal degree in co-relation 44890. Up to 2410 conditions per place. [2021-11-09 09:17:11,501 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1068 selfloop transitions, 369 changer transitions 4/1477 dead transitions. [2021-11-09 09:17:11,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 1477 transitions, 39857 flow [2021-11-09 09:17:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:17:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-09 09:17:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1280 transitions. [2021-11-09 09:17:11,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.631163708086785 [2021-11-09 09:17:11,504 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1280 transitions. [2021-11-09 09:17:11,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1280 transitions. [2021-11-09 09:17:11,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:17:11,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1280 transitions. [2021-11-09 09:17:11,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 49.23076923076923) internal successors, (1280), 26 states have internal predecessors, (1280), 0 states have call successors, (0), 0 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 09:17:11,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:17:11,507 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 78.0) internal successors, (2106), 27 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 09:17:11,507 INFO L186 Difference]: Start difference. First operand has 751 places, 1357 transitions, 33630 flow. Second operand 26 states and 1280 transitions. [2021-11-09 09:17:11,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 1477 transitions, 39857 flow [2021-11-09 09:17:13,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 1477 transitions, 39023 flow, removed 54 selfloop flow, removed 17 redundant places. [2021-11-09 09:17:13,992 INFO L242 Difference]: Finished difference. Result has 761 places, 1415 transitions, 35723 flow [2021-11-09 09:17:13,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=32938, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=35723, PETRI_PLACES=761, PETRI_TRANSITIONS=1415} [2021-11-09 09:17:13,993 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 692 predicate places. [2021-11-09 09:17:13,994 INFO L470 AbstractCegarLoop]: Abstraction has has 761 places, 1415 transitions, 35723 flow [2021-11-09 09:17:13,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:17:13,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:17:13,994 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:17:14,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-09 09:17:14,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-11-09 09:17:14,195 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:17:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:17:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1868651029, now seen corresponding path program 84 times [2021-11-09 09:17:14,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:17:14,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222596153] [2021-11-09 09:17:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:17:14,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:17:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:17:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:17:14,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:17:14,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222596153] [2021-11-09 09:17:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222596153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:17:14,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352820779] [2021-11-09 09:17:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:17:14,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:17:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:17:14,488 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:17:14,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-09 09:17:18,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 09:17:18,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:17:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:17:18,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:17:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:17:18,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352820779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:17:18,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:17:18,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:17:18,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661053064] [2021-11-09 09:17:18,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:17:18,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:17:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:17:18,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:17:18,949 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:17:18,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 761 places, 1415 transitions, 35723 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:17:18,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:17:18,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:17:18,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:17:23,096 INFO L129 PetriNetUnfolder]: 1793/4439 cut-off events. [2021-11-09 09:17:23,096 INFO L130 PetriNetUnfolder]: For 175166/175166 co-relation queries the response was YES. [2021-11-09 09:17:23,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45052 conditions, 4439 events. 1793/4439 cut-off events. For 175166/175166 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40138 event pairs, 427 based on Foata normal form. 1/4437 useless extension candidates. Maximal degree in co-relation 44811. Up to 2410 conditions per place. [2021-11-09 09:17:23,236 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1085 selfloop transitions, 343 changer transitions 7/1471 dead transitions. [2021-11-09 09:17:23,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 1471 transitions, 39828 flow [2021-11-09 09:17:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:17:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-09 09:17:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1136 transitions. [2021-11-09 09:17:23,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.633221850613155 [2021-11-09 09:17:23,238 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1136 transitions. [2021-11-09 09:17:23,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1136 transitions. [2021-11-09 09:17:23,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:17:23,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1136 transitions. [2021-11-09 09:17:23,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 49.391304347826086) internal successors, (1136), 23 states have internal predecessors, (1136), 0 states have call successors, (0), 0 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 09:17:23,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:17:23,240 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 78.0) internal successors, (1872), 24 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 09:17:23,241 INFO L186 Difference]: Start difference. First operand has 761 places, 1415 transitions, 35723 flow. Second operand 23 states and 1136 transitions. [2021-11-09 09:17:23,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 1471 transitions, 39828 flow [2021-11-09 09:17:25,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 1471 transitions, 39250 flow, removed 60 selfloop flow, removed 16 redundant places. [2021-11-09 09:17:25,263 INFO L242 Difference]: Finished difference. Result has 767 places, 1413 transitions, 35828 flow [2021-11-09 09:17:25,265 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=35155, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35828, PETRI_PLACES=767, PETRI_TRANSITIONS=1413} [2021-11-09 09:17:25,265 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 698 predicate places. [2021-11-09 09:17:25,265 INFO L470 AbstractCegarLoop]: Abstraction has has 767 places, 1413 transitions, 35828 flow [2021-11-09 09:17:25,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:17:25,265 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:17:25,266 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:17:25,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-09 09:17:25,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:17:25,494 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:17:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:17:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1956546515, now seen corresponding path program 85 times [2021-11-09 09:17:25,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:17:25,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933016942] [2021-11-09 09:17:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:17:25,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:17:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:17:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:17:25,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:17:25,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933016942] [2021-11-09 09:17:25,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933016942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:17:25,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18282144] [2021-11-09 09:17:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:17:25,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:17:25,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:17:25,962 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:17:25,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f609147-843e-4f01-a020-1bbf8beb7a30/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-09 09:17:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:17:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:17:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:17:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:17:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18282144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:17:30,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:17:30,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:17:30,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640402464] [2021-11-09 09:17:30,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:17:30,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:17:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:17:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:17:30,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2021-11-09 09:17:30,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 1413 transitions, 35828 flow. Second operand has 22 states, 22 states have (on average 46.59090909090909) internal successors, (1025), 22 states have internal predecessors, (1025), 0 states have call successors, (0), 0 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 09:17:30,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:17:30,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2021-11-09 09:17:30,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:17:34,564 INFO L129 PetriNetUnfolder]: 1860/4625 cut-off events. [2021-11-09 09:17:34,564 INFO L130 PetriNetUnfolder]: For 186963/186963 co-relation queries the response was YES. [2021-11-09 09:17:34,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 4625 events. 1860/4625 cut-off events. For 186963/186963 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 42240 event pairs, 465 based on Foata normal form. 1/4623 useless extension candidates. Maximal degree in co-relation 46702. Up to 2743 conditions per place. [2021-11-09 09:17:34,715 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 1196 selfloop transitions, 290 changer transitions 4/1526 dead transitions. [2021-11-09 09:17:34,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 1526 transitions, 41613 flow [2021-11-09 09:17:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:17:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-09 09:17:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 843 transitions. [2021-11-09 09:17:34,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6357466063348416 [2021-11-09 09:17:34,718 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 843 transitions. [2021-11-09 09:17:34,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 843 transitions. [2021-11-09 09:17:34,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:17:34,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 843 transitions. [2021-11-09 09:17:34,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 49.588235294117645) internal successors, (843), 17 states have internal predecessors, (843), 0 states have call successors, (0), 0 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 09:17:34,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:17:34,719 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 78.0) internal successors, (1404), 18 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 09:17:34,719 INFO L186 Difference]: Start difference. First operand has 767 places, 1413 transitions, 35828 flow. Second operand 17 states and 843 transitions. [2021-11-09 09:17:34,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 1526 transitions, 41613 flow