./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro --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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:44:29,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:44:29,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:44:29,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:44:29,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:44:29,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:44:29,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:44:29,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:44:29,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:44:29,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:44:29,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:44:29,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:44:29,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:44:29,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:44:29,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:44:29,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:44:29,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:44:29,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:44:29,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:44:29,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:44:29,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:44:29,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:44:29,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:44:29,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:44:29,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:44:29,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:44:29,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:44:29,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:44:29,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:44:29,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:44:29,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:44:29,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:44:29,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:44:29,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:44:29,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:44:29,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:44:29,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:44:29,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:44:29,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:44:29,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:44:29,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:44:29,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:44:29,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:44:29,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:44:29,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:44:29,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:44:29,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:44:29,426 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:44:29,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:44:29,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:44:29,428 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:44:29,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:44:29,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:44:29,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:44:29,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:44:29,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:44:29,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:44:29,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:44:29,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:44:29,431 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:44:29,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:44:29,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:44:29,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:44:29,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:44:29,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:44:29,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:44:29,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:44:29,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:44:29,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:44:29,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:44:29,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:44:29,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:44:29,435 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:44:29,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:44:29,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:44:29,435 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_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2022-11-18 18:44:29,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:44:29,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:44:29,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:44:29,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:44:29,774 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:44:29,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-11-18 18:44:29,861 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/data/c87d25e92/7ca58497e0a147d995a0b0d3cb9234f5/FLAG54879c2d8 [2022-11-18 18:44:30,374 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:44:30,375 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-11-18 18:44:30,382 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/data/c87d25e92/7ca58497e0a147d995a0b0d3cb9234f5/FLAG54879c2d8 [2022-11-18 18:44:30,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/data/c87d25e92/7ca58497e0a147d995a0b0d3cb9234f5 [2022-11-18 18:44:30,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:44:30,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:44:30,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:44:30,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:44:30,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:44:30,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:44:30" (1/1) ... [2022-11-18 18:44:30,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ae0428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:30, skipping insertion in model container [2022-11-18 18:44:30,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:44:30" (1/1) ... [2022-11-18 18:44:30,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:44:30,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:44:31,039 WARN L234 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_6991ee3a-931a-480f-9605-240c3f72f744/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-11-18 18:44:31,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:44:31,069 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:44:31,114 WARN L234 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_6991ee3a-931a-480f-9605-240c3f72f744/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-11-18 18:44:31,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:44:31,135 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:44:31,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31 WrapperNode [2022-11-18 18:44:31,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:44:31,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:44:31,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:44:31,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:44:31,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,201 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 162 [2022-11-18 18:44:31,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:44:31,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:44:31,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:44:31,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:44:31,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,251 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:44:31,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:44:31,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:44:31,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:44:31,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (1/1) ... [2022-11-18 18:44:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:44:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:31,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:44:31,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:44:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:44:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:44:31,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:44:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:44:31,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:44:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:44:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:44:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:44:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:44:31,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:44:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:44:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:44:31,352 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:44:31,488 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:44:31,490 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:44:31,908 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:44:31,920 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:44:31,923 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:44:31,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:44:31 BoogieIcfgContainer [2022-11-18 18:44:31,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:44:31,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:44:31,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:44:31,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:44:31,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:44:30" (1/3) ... [2022-11-18 18:44:31,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634e8afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:44:31, skipping insertion in model container [2022-11-18 18:44:31,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:44:31" (2/3) ... [2022-11-18 18:44:31,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634e8afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:44:31, skipping insertion in model container [2022-11-18 18:44:31,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:44:31" (3/3) ... [2022-11-18 18:44:31,940 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-11-18 18:44:31,950 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:44:31,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:44:31,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:44:31,962 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:44:32,143 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:44:32,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 220 transitions, 456 flow [2022-11-18 18:44:32,402 INFO L130 PetriNetUnfolder]: 14/218 cut-off events. [2022-11-18 18:44:32,403 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:44:32,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 14/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 315 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2022-11-18 18:44:32,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 220 transitions, 456 flow [2022-11-18 18:44:32,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 209 transitions, 430 flow [2022-11-18 18:44:32,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:44:32,458 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ab7cf3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:44:32,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 18:44:32,528 INFO L130 PetriNetUnfolder]: 8/149 cut-off events. [2022-11-18 18:44:32,528 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:44:32,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:32,529 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:32,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1622558315, now seen corresponding path program 1 times [2022-11-18 18:44:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:32,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265888733] [2022-11-18 18:44:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:32,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:32,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265888733] [2022-11-18 18:44:32,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265888733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:32,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:32,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:44:32,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532174309] [2022-11-18 18:44:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:44:32,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:44:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:44:32,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 220 [2022-11-18 18:44:32,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 209 transitions, 430 flow. Second operand has 2 states, 2 states have (on average 206.0) internal successors, (412), 2 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:32,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:32,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 220 [2022-11-18 18:44:32,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:32,951 INFO L130 PetriNetUnfolder]: 2/197 cut-off events. [2022-11-18 18:44:32,951 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 18:44:32,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 197 events. 2/197 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 262 event pairs, 0 based on Foata normal form. 14/199 useless extension candidates. Maximal degree in co-relation 134. Up to 5 conditions per place. [2022-11-18 18:44:32,960 INFO L137 encePairwiseOnDemand]: 208/220 looper letters, 4 selfloop transitions, 0 changer transitions 2/197 dead transitions. [2022-11-18 18:44:32,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 414 flow [2022-11-18 18:44:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:44:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:44:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 422 transitions. [2022-11-18 18:44:32,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9590909090909091 [2022-11-18 18:44:32,986 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 422 transitions. [2022-11-18 18:44:32,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 422 transitions. [2022-11-18 18:44:32,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:32,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 422 transitions. [2022-11-18 18:44:32,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:33,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:33,008 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:33,010 INFO L175 Difference]: Start difference. First operand has 202 places, 209 transitions, 430 flow. Second operand 2 states and 422 transitions. [2022-11-18 18:44:33,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 414 flow [2022-11-18 18:44:33,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 197 transitions, 406 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 18:44:33,023 INFO L231 Difference]: Finished difference. Result has 199 places, 195 transitions, 394 flow [2022-11-18 18:44:33,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=394, PETRI_PLACES=199, PETRI_TRANSITIONS=195} [2022-11-18 18:44:33,030 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, -3 predicate places. [2022-11-18 18:44:33,030 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 195 transitions, 394 flow [2022-11-18 18:44:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 206.0) internal successors, (412), 2 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:33,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:33,043 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:44:33,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash 486725857, now seen corresponding path program 1 times [2022-11-18 18:44:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452704797] [2022-11-18 18:44:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:34,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452704797] [2022-11-18 18:44:34,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452704797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:34,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:34,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:44:34,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096410172] [2022-11-18 18:44:34,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:34,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:44:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:44:34,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:34,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 220 [2022-11-18 18:44:34,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 195 transitions, 394 flow. Second operand has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:34,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:34,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 220 [2022-11-18 18:44:34,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:34,581 INFO L130 PetriNetUnfolder]: 57/754 cut-off events. [2022-11-18 18:44:34,587 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-18 18:44:34,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 754 events. 57/754 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3730 event pairs, 7 based on Foata normal form. 1/695 useless extension candidates. Maximal degree in co-relation 895. Up to 97 conditions per place. [2022-11-18 18:44:34,592 INFO L137 encePairwiseOnDemand]: 210/220 looper letters, 37 selfloop transitions, 7 changer transitions 6/217 dead transitions. [2022-11-18 18:44:34,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 217 transitions, 544 flow [2022-11-18 18:44:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:44:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1644 transitions. [2022-11-18 18:44:34,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2022-11-18 18:44:34,597 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1644 transitions. [2022-11-18 18:44:34,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1644 transitions. [2022-11-18 18:44:34,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:34,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1644 transitions. [2022-11-18 18:44:34,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.66666666666666) internal successors, (1644), 9 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:34,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:34,609 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:34,610 INFO L175 Difference]: Start difference. First operand has 199 places, 195 transitions, 394 flow. Second operand 9 states and 1644 transitions. [2022-11-18 18:44:34,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 217 transitions, 544 flow [2022-11-18 18:44:34,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 217 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:44:34,622 INFO L231 Difference]: Finished difference. Result has 210 places, 199 transitions, 436 flow [2022-11-18 18:44:34,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=210, PETRI_TRANSITIONS=199} [2022-11-18 18:44:34,623 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 8 predicate places. [2022-11-18 18:44:34,624 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 199 transitions, 436 flow [2022-11-18 18:44:34,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:34,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:34,625 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:34,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:44:34,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:34,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1018501207, now seen corresponding path program 2 times [2022-11-18 18:44:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:34,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956162912] [2022-11-18 18:44:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:34,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:35,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956162912] [2022-11-18 18:44:35,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956162912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:35,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:35,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:44:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714275370] [2022-11-18 18:44:35,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:35,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:44:35,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:35,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:44:35,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:35,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 220 [2022-11-18 18:44:35,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 199 transitions, 436 flow. Second operand has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:35,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:35,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 220 [2022-11-18 18:44:35,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:35,551 INFO L130 PetriNetUnfolder]: 57/759 cut-off events. [2022-11-18 18:44:35,551 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-11-18 18:44:35,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 759 events. 57/759 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3752 event pairs, 5 based on Foata normal form. 1/701 useless extension candidates. Maximal degree in co-relation 961. Up to 97 conditions per place. [2022-11-18 18:44:35,556 INFO L137 encePairwiseOnDemand]: 210/220 looper letters, 32 selfloop transitions, 8 changer transitions 6/213 dead transitions. [2022-11-18 18:44:35,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 213 transitions, 574 flow [2022-11-18 18:44:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:44:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1639 transitions. [2022-11-18 18:44:35,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8277777777777777 [2022-11-18 18:44:35,561 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1639 transitions. [2022-11-18 18:44:35,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1639 transitions. [2022-11-18 18:44:35,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:35,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1639 transitions. [2022-11-18 18:44:35,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.11111111111111) internal successors, (1639), 9 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:35,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:35,571 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:35,571 INFO L175 Difference]: Start difference. First operand has 210 places, 199 transitions, 436 flow. Second operand 9 states and 1639 transitions. [2022-11-18 18:44:35,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 213 transitions, 574 flow [2022-11-18 18:44:35,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 213 transitions, 560 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-18 18:44:35,579 INFO L231 Difference]: Finished difference. Result has 215 places, 201 transitions, 468 flow [2022-11-18 18:44:35,579 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=468, PETRI_PLACES=215, PETRI_TRANSITIONS=201} [2022-11-18 18:44:35,582 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 13 predicate places. [2022-11-18 18:44:35,582 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 201 transitions, 468 flow [2022-11-18 18:44:35,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 179.44444444444446) internal successors, (1615), 9 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:35,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:35,584 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:35,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:44:35,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash 824399851, now seen corresponding path program 1 times [2022-11-18 18:44:35,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:35,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569983841] [2022-11-18 18:44:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:35,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:35,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:35,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569983841] [2022-11-18 18:44:35,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569983841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:35,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:35,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:35,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516703733] [2022-11-18 18:44:35,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:35,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:35,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:35,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 201 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:35,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:35,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:35,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:36,094 INFO L130 PetriNetUnfolder]: 90/1434 cut-off events. [2022-11-18 18:44:36,094 INFO L131 PetriNetUnfolder]: For 53/55 co-relation queries the response was YES. [2022-11-18 18:44:36,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1434 events. 90/1434 cut-off events. For 53/55 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8255 event pairs, 30 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 1725. Up to 97 conditions per place. [2022-11-18 18:44:36,103 INFO L137 encePairwiseOnDemand]: 213/220 looper letters, 27 selfloop transitions, 5 changer transitions 3/220 dead transitions. [2022-11-18 18:44:36,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 220 transitions, 580 flow [2022-11-18 18:44:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:44:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:44:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1182 transitions. [2022-11-18 18:44:36,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8954545454545455 [2022-11-18 18:44:36,106 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1182 transitions. [2022-11-18 18:44:36,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1182 transitions. [2022-11-18 18:44:36,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:36,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1182 transitions. [2022-11-18 18:44:36,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,114 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,117 INFO L175 Difference]: Start difference. First operand has 215 places, 201 transitions, 468 flow. Second operand 6 states and 1182 transitions. [2022-11-18 18:44:36,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 220 transitions, 580 flow [2022-11-18 18:44:36,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 220 transitions, 563 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-11-18 18:44:36,126 INFO L231 Difference]: Finished difference. Result has 214 places, 203 transitions, 477 flow [2022-11-18 18:44:36,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=477, PETRI_PLACES=214, PETRI_TRANSITIONS=203} [2022-11-18 18:44:36,128 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 12 predicate places. [2022-11-18 18:44:36,130 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 203 transitions, 477 flow [2022-11-18 18:44:36,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:36,132 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:36,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:44:36,132 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1704802457, now seen corresponding path program 2 times [2022-11-18 18:44:36,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:36,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658378192] [2022-11-18 18:44:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:36,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:36,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658378192] [2022-11-18 18:44:36,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658378192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:36,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704647231] [2022-11-18 18:44:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:44:36,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:36,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:36,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:44:36,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:44:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:44:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:36,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:36,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704647231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:36,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:36,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-18 18:44:36,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369430980] [2022-11-18 18:44:36,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:44:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:36,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:44:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:44:36,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:36,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 203 transitions, 477 flow. Second operand has 9 states, 9 states have (on average 193.44444444444446) internal successors, (1741), 9 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:36,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:36,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:36,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:37,429 INFO L130 PetriNetUnfolder]: 139/2415 cut-off events. [2022-11-18 18:44:37,430 INFO L131 PetriNetUnfolder]: For 187/188 co-relation queries the response was YES. [2022-11-18 18:44:37,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2957 conditions, 2415 events. 139/2415 cut-off events. For 187/188 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 16449 event pairs, 4 based on Foata normal form. 7/2265 useless extension candidates. Maximal degree in co-relation 2945. Up to 57 conditions per place. [2022-11-18 18:44:37,446 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 51 selfloop transitions, 31 changer transitions 1/268 dead transitions. [2022-11-18 18:44:37,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 268 transitions, 857 flow [2022-11-18 18:44:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:44:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 18:44:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2750 transitions. [2022-11-18 18:44:37,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2022-11-18 18:44:37,453 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2750 transitions. [2022-11-18 18:44:37,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2750 transitions. [2022-11-18 18:44:37,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:37,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2750 transitions. [2022-11-18 18:44:37,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 196.42857142857142) internal successors, (2750), 14 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:37,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 220.0) internal successors, (3300), 15 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:37,504 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 220.0) internal successors, (3300), 15 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:37,504 INFO L175 Difference]: Start difference. First operand has 214 places, 203 transitions, 477 flow. Second operand 14 states and 2750 transitions. [2022-11-18 18:44:37,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 268 transitions, 857 flow [2022-11-18 18:44:37,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 268 transitions, 830 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-18 18:44:37,515 INFO L231 Difference]: Finished difference. Result has 230 places, 235 transitions, 689 flow [2022-11-18 18:44:37,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=689, PETRI_PLACES=230, PETRI_TRANSITIONS=235} [2022-11-18 18:44:37,518 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 28 predicate places. [2022-11-18 18:44:37,518 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 235 transitions, 689 flow [2022-11-18 18:44:37,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 193.44444444444446) internal successors, (1741), 9 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:37,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:37,519 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:37,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:37,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:37,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1304616419, now seen corresponding path program 1 times [2022-11-18 18:44:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745301663] [2022-11-18 18:44:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:37,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:37,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745301663] [2022-11-18 18:44:37,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745301663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:37,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:37,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085076491] [2022-11-18 18:44:37,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:37,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:37,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:37,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:37,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 235 transitions, 689 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:37,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:37,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:37,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:38,544 INFO L130 PetriNetUnfolder]: 168/2767 cut-off events. [2022-11-18 18:44:38,544 INFO L131 PetriNetUnfolder]: For 666/670 co-relation queries the response was YES. [2022-11-18 18:44:38,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 2767 events. 168/2767 cut-off events. For 666/670 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 19751 event pairs, 42 based on Foata normal form. 3/2578 useless extension candidates. Maximal degree in co-relation 3696. Up to 155 conditions per place. [2022-11-18 18:44:38,562 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 71 selfloop transitions, 24 changer transitions 4/284 dead transitions. [2022-11-18 18:44:38,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 284 transitions, 1135 flow [2022-11-18 18:44:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:44:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:44:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1195 transitions. [2022-11-18 18:44:38,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9053030303030303 [2022-11-18 18:44:38,566 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1195 transitions. [2022-11-18 18:44:38,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1195 transitions. [2022-11-18 18:44:38,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:38,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1195 transitions. [2022-11-18 18:44:38,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:38,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:38,572 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:38,572 INFO L175 Difference]: Start difference. First operand has 230 places, 235 transitions, 689 flow. Second operand 6 states and 1195 transitions. [2022-11-18 18:44:38,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 284 transitions, 1135 flow [2022-11-18 18:44:38,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 284 transitions, 1131 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-18 18:44:38,583 INFO L231 Difference]: Finished difference. Result has 238 places, 245 transitions, 850 flow [2022-11-18 18:44:38,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=850, PETRI_PLACES=238, PETRI_TRANSITIONS=245} [2022-11-18 18:44:38,584 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 36 predicate places. [2022-11-18 18:44:38,584 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 245 transitions, 850 flow [2022-11-18 18:44:38,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:38,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:38,585 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:38,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:44:38,586 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash -962132957, now seen corresponding path program 2 times [2022-11-18 18:44:38,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:38,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10040591] [2022-11-18 18:44:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:38,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10040591] [2022-11-18 18:44:38,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10040591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:38,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:38,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286107541] [2022-11-18 18:44:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:38,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:38,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:38,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:38,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 245 transitions, 850 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:38,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:38,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:38,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:39,250 INFO L130 PetriNetUnfolder]: 163/2580 cut-off events. [2022-11-18 18:44:39,250 INFO L131 PetriNetUnfolder]: For 1011/1014 co-relation queries the response was YES. [2022-11-18 18:44:39,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3686 conditions, 2580 events. 163/2580 cut-off events. For 1011/1014 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 18033 event pairs, 42 based on Foata normal form. 4/2405 useless extension candidates. Maximal degree in co-relation 3664. Up to 162 conditions per place. [2022-11-18 18:44:39,267 INFO L137 encePairwiseOnDemand]: 213/220 looper letters, 57 selfloop transitions, 15 changer transitions 5/262 dead transitions. [2022-11-18 18:44:39,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 262 transitions, 1114 flow [2022-11-18 18:44:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:44:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:44:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1183 transitions. [2022-11-18 18:44:39,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8962121212121212 [2022-11-18 18:44:39,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1183 transitions. [2022-11-18 18:44:39,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1183 transitions. [2022-11-18 18:44:39,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:39,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1183 transitions. [2022-11-18 18:44:39,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.16666666666666) internal successors, (1183), 6 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,278 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,278 INFO L175 Difference]: Start difference. First operand has 238 places, 245 transitions, 850 flow. Second operand 6 states and 1183 transitions. [2022-11-18 18:44:39,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 262 transitions, 1114 flow [2022-11-18 18:44:39,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 262 transitions, 1088 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 18:44:39,289 INFO L231 Difference]: Finished difference. Result has 244 places, 245 transitions, 863 flow [2022-11-18 18:44:39,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=244, PETRI_TRANSITIONS=245} [2022-11-18 18:44:39,291 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 42 predicate places. [2022-11-18 18:44:39,291 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 245 transitions, 863 flow [2022-11-18 18:44:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:39,292 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:39,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:44:39,292 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1225776221, now seen corresponding path program 3 times [2022-11-18 18:44:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:39,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176180184] [2022-11-18 18:44:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:39,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:39,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176180184] [2022-11-18 18:44:39,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176180184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:39,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:39,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:44:39,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392061109] [2022-11-18 18:44:39,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:44:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:39,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:44:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:44:39,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:39,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 245 transitions, 863 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:39,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:39,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:39,966 INFO L130 PetriNetUnfolder]: 158/2472 cut-off events. [2022-11-18 18:44:39,967 INFO L131 PetriNetUnfolder]: For 1092/1101 co-relation queries the response was YES. [2022-11-18 18:44:39,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 2472 events. 158/2472 cut-off events. For 1092/1101 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 17464 event pairs, 39 based on Foata normal form. 3/2301 useless extension candidates. Maximal degree in co-relation 3540. Up to 161 conditions per place. [2022-11-18 18:44:39,984 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 66 selfloop transitions, 21 changer transitions 3/275 dead transitions. [2022-11-18 18:44:39,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 275 transitions, 1225 flow [2022-11-18 18:44:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:44:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:44:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2022-11-18 18:44:39,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9068181818181819 [2022-11-18 18:44:39,988 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2022-11-18 18:44:39,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2022-11-18 18:44:39,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:39,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2022-11-18 18:44:39,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,996 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:39,997 INFO L175 Difference]: Start difference. First operand has 244 places, 245 transitions, 863 flow. Second operand 6 states and 1197 transitions. [2022-11-18 18:44:39,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 275 transitions, 1225 flow [2022-11-18 18:44:40,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 275 transitions, 1204 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-18 18:44:40,009 INFO L231 Difference]: Finished difference. Result has 247 places, 251 transitions, 975 flow [2022-11-18 18:44:40,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=975, PETRI_PLACES=247, PETRI_TRANSITIONS=251} [2022-11-18 18:44:40,011 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 45 predicate places. [2022-11-18 18:44:40,011 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 251 transitions, 975 flow [2022-11-18 18:44:40,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:40,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:40,012 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:40,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:44:40,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1919373709, now seen corresponding path program 4 times [2022-11-18 18:44:40,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:40,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270790408] [2022-11-18 18:44:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:40,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:40,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270790408] [2022-11-18 18:44:40,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270790408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563746204] [2022-11-18 18:44:40,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:44:40,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:40,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:40,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:44:40,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:44:40,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:44:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:40,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:40,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563746204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:40,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:40,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-18 18:44:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954697252] [2022-11-18 18:44:40,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:40,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:44:40,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:44:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:44:40,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:40,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 251 transitions, 975 flow. Second operand has 11 states, 11 states have (on average 193.45454545454547) internal successors, (2128), 11 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:40,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:40,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:40,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:41,360 INFO L130 PetriNetUnfolder]: 147/2516 cut-off events. [2022-11-18 18:44:41,360 INFO L131 PetriNetUnfolder]: For 1288/1293 co-relation queries the response was YES. [2022-11-18 18:44:41,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3601 conditions, 2516 events. 147/2516 cut-off events. For 1288/1293 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 17523 event pairs, 24 based on Foata normal form. 12/2360 useless extension candidates. Maximal degree in co-relation 3576. Up to 112 conditions per place. [2022-11-18 18:44:41,379 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 67 selfloop transitions, 29 changer transitions 4/285 dead transitions. [2022-11-18 18:44:41,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 285 transitions, 1356 flow [2022-11-18 18:44:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:44:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1780 transitions. [2022-11-18 18:44:41,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.898989898989899 [2022-11-18 18:44:41,384 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1780 transitions. [2022-11-18 18:44:41,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1780 transitions. [2022-11-18 18:44:41,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:41,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1780 transitions. [2022-11-18 18:44:41,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.77777777777777) internal successors, (1780), 9 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:41,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:41,410 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:41,410 INFO L175 Difference]: Start difference. First operand has 247 places, 251 transitions, 975 flow. Second operand 9 states and 1780 transitions. [2022-11-18 18:44:41,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 285 transitions, 1356 flow [2022-11-18 18:44:41,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 285 transitions, 1335 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 18:44:41,422 INFO L231 Difference]: Finished difference. Result has 258 places, 256 transitions, 1089 flow [2022-11-18 18:44:41,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1089, PETRI_PLACES=258, PETRI_TRANSITIONS=256} [2022-11-18 18:44:41,423 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 56 predicate places. [2022-11-18 18:44:41,424 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 256 transitions, 1089 flow [2022-11-18 18:44:41,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.45454545454547) internal successors, (2128), 11 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:41,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:41,425 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:41,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:41,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:41,630 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:41,631 INFO L85 PathProgramCache]: Analyzing trace with hash -408082141, now seen corresponding path program 5 times [2022-11-18 18:44:41,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:41,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229969008] [2022-11-18 18:44:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:41,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229969008] [2022-11-18 18:44:41,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229969008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:44:41,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:44:41,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:44:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228551017] [2022-11-18 18:44:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:44:41,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:44:41,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:44:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:44:41,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:41,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 256 transitions, 1089 flow. Second operand has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 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) [2022-11-18 18:44:41,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:41,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:41,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:42,456 INFO L130 PetriNetUnfolder]: 169/3042 cut-off events. [2022-11-18 18:44:42,456 INFO L131 PetriNetUnfolder]: For 1996/1998 co-relation queries the response was YES. [2022-11-18 18:44:42,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4441 conditions, 3042 events. 169/3042 cut-off events. For 1996/1998 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 23000 event pairs, 28 based on Foata normal form. 6/2836 useless extension candidates. Maximal degree in co-relation 4411. Up to 136 conditions per place. [2022-11-18 18:44:42,480 INFO L137 encePairwiseOnDemand]: 214/220 looper letters, 87 selfloop transitions, 34 changer transitions 1/307 dead transitions. [2022-11-18 18:44:42,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 307 transitions, 1737 flow [2022-11-18 18:44:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:44:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:44:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1390 transitions. [2022-11-18 18:44:42,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9025974025974026 [2022-11-18 18:44:42,484 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1390 transitions. [2022-11-18 18:44:42,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1390 transitions. [2022-11-18 18:44:42,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:42,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1390 transitions. [2022-11-18 18:44:42,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:42,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:42,492 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 220.0) internal successors, (1760), 8 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:42,492 INFO L175 Difference]: Start difference. First operand has 258 places, 256 transitions, 1089 flow. Second operand 7 states and 1390 transitions. [2022-11-18 18:44:42,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 307 transitions, 1737 flow [2022-11-18 18:44:42,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 307 transitions, 1515 flow, removed 54 selfloop flow, removed 9 redundant places. [2022-11-18 18:44:42,508 INFO L231 Difference]: Finished difference. Result has 258 places, 268 transitions, 1197 flow [2022-11-18 18:44:42,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1197, PETRI_PLACES=258, PETRI_TRANSITIONS=268} [2022-11-18 18:44:42,510 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 56 predicate places. [2022-11-18 18:44:42,511 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 268 transitions, 1197 flow [2022-11-18 18:44:42,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 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) [2022-11-18 18:44:42,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:42,511 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:42,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:44:42,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1450219961, now seen corresponding path program 3 times [2022-11-18 18:44:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:42,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385352006] [2022-11-18 18:44:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:42,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385352006] [2022-11-18 18:44:42,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385352006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246587299] [2022-11-18 18:44:42,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:44:42,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:42,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:42,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:42,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:44:42,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:44:42,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:44:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:43,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:43,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246587299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:43,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:43,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-18 18:44:43,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964482936] [2022-11-18 18:44:43,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:43,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:44:43,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:44:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:44:43,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:43,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 268 transitions, 1197 flow. Second operand has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:43,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:43,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:43,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:44,150 INFO L130 PetriNetUnfolder]: 206/3802 cut-off events. [2022-11-18 18:44:44,151 INFO L131 PetriNetUnfolder]: For 2103/2117 co-relation queries the response was YES. [2022-11-18 18:44:44,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 3802 events. 206/3802 cut-off events. For 2103/2117 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 31576 event pairs, 21 based on Foata normal form. 9/3549 useless extension candidates. Maximal degree in co-relation 5287. Up to 108 conditions per place. [2022-11-18 18:44:44,179 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 61 selfloop transitions, 71 changer transitions 0/317 dead transitions. [2022-11-18 18:44:44,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 317 transitions, 1706 flow [2022-11-18 18:44:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:44:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 18:44:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2558 transitions. [2022-11-18 18:44:44,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8944055944055944 [2022-11-18 18:44:44,188 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2558 transitions. [2022-11-18 18:44:44,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2558 transitions. [2022-11-18 18:44:44,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:44,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2558 transitions. [2022-11-18 18:44:44,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 196.76923076923077) internal successors, (2558), 13 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:44,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 220.0) internal successors, (3080), 14 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:44,203 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 220.0) internal successors, (3080), 14 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:44,203 INFO L175 Difference]: Start difference. First operand has 258 places, 268 transitions, 1197 flow. Second operand 13 states and 2558 transitions. [2022-11-18 18:44:44,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 317 transitions, 1706 flow [2022-11-18 18:44:44,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 317 transitions, 1652 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-18 18:44:44,221 INFO L231 Difference]: Finished difference. Result has 271 places, 286 transitions, 1515 flow [2022-11-18 18:44:44,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1515, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2022-11-18 18:44:44,222 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 69 predicate places. [2022-11-18 18:44:44,222 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 1515 flow [2022-11-18 18:44:44,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:44,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:44,223 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:44,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:44,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:44,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2107569693, now seen corresponding path program 4 times [2022-11-18 18:44:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264955008] [2022-11-18 18:44:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:44,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:44,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264955008] [2022-11-18 18:44:44,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264955008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:44,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947757523] [2022-11-18 18:44:44,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:44:44,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:44,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:44,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:44,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:44:44,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:44:44,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:44:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:44,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:45,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947757523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:45,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:45,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-18 18:44:45,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557671345] [2022-11-18 18:44:45,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:45,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:44:45,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:44:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:44:45,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:45,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 1515 flow. Second operand has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:45,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:45,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:45,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:45,916 INFO L130 PetriNetUnfolder]: 191/3538 cut-off events. [2022-11-18 18:44:45,916 INFO L131 PetriNetUnfolder]: For 2465/2477 co-relation queries the response was YES. [2022-11-18 18:44:45,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5122 conditions, 3538 events. 191/3538 cut-off events. For 2465/2477 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 29040 event pairs, 35 based on Foata normal form. 9/3300 useless extension candidates. Maximal degree in co-relation 5092. Up to 156 conditions per place. [2022-11-18 18:44:45,952 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 60 selfloop transitions, 60 changer transitions 3/304 dead transitions. [2022-11-18 18:44:45,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 304 transitions, 1782 flow [2022-11-18 18:44:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:44:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:44:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1777 transitions. [2022-11-18 18:44:45,957 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8974747474747474 [2022-11-18 18:44:45,957 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1777 transitions. [2022-11-18 18:44:45,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1777 transitions. [2022-11-18 18:44:45,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:45,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1777 transitions. [2022-11-18 18:44:45,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.44444444444446) internal successors, (1777), 9 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:45,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:45,966 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 220.0) internal successors, (2200), 10 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:45,968 INFO L175 Difference]: Start difference. First operand has 271 places, 286 transitions, 1515 flow. Second operand 9 states and 1777 transitions. [2022-11-18 18:44:45,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 304 transitions, 1782 flow [2022-11-18 18:44:45,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 1762 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-18 18:44:45,992 INFO L231 Difference]: Finished difference. Result has 278 places, 280 transitions, 1569 flow [2022-11-18 18:44:45,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1569, PETRI_PLACES=278, PETRI_TRANSITIONS=280} [2022-11-18 18:44:45,994 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 76 predicate places. [2022-11-18 18:44:45,994 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 280 transitions, 1569 flow [2022-11-18 18:44:45,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:45,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:45,995 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:46,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 18:44:46,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:44:46,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash -135938193, now seen corresponding path program 6 times [2022-11-18 18:44:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545196063] [2022-11-18 18:44:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:46,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:46,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545196063] [2022-11-18 18:44:46,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545196063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:46,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195266887] [2022-11-18 18:44:46,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:44:46,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:46,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:46,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:46,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:44:46,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 18:44:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:44:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:44:46,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:46,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:46,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195266887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:46,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:46,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-18 18:44:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882136217] [2022-11-18 18:44:46,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:46,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:44:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:44:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:44:46,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 220 [2022-11-18 18:44:46,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 280 transitions, 1569 flow. Second operand has 11 states, 11 states have (on average 193.36363636363637) internal successors, (2127), 11 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:46,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:46,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 220 [2022-11-18 18:44:46,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:44:47,725 INFO L130 PetriNetUnfolder]: 197/4020 cut-off events. [2022-11-18 18:44:47,725 INFO L131 PetriNetUnfolder]: For 3103/3111 co-relation queries the response was YES. [2022-11-18 18:44:47,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5861 conditions, 4020 events. 197/4020 cut-off events. For 3103/3111 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 34673 event pairs, 35 based on Foata normal form. 12/3751 useless extension candidates. Maximal degree in co-relation 5829. Up to 118 conditions per place. [2022-11-18 18:44:47,752 INFO L137 encePairwiseOnDemand]: 212/220 looper letters, 76 selfloop transitions, 72 changer transitions 1/330 dead transitions. [2022-11-18 18:44:47,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 330 transitions, 2282 flow [2022-11-18 18:44:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:44:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 18:44:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2356 transitions. [2022-11-18 18:44:47,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8924242424242425 [2022-11-18 18:44:47,759 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2356 transitions. [2022-11-18 18:44:47,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2356 transitions. [2022-11-18 18:44:47,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:44:47,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2356 transitions. [2022-11-18 18:44:47,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 196.33333333333334) internal successors, (2356), 12 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:47,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 220.0) internal successors, (2860), 13 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:47,772 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 220.0) internal successors, (2860), 13 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:47,772 INFO L175 Difference]: Start difference. First operand has 278 places, 280 transitions, 1569 flow. Second operand 12 states and 2356 transitions. [2022-11-18 18:44:47,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 330 transitions, 2282 flow [2022-11-18 18:44:47,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 330 transitions, 2120 flow, removed 21 selfloop flow, removed 9 redundant places. [2022-11-18 18:44:47,798 INFO L231 Difference]: Finished difference. Result has 278 places, 301 transitions, 1864 flow [2022-11-18 18:44:47,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1864, PETRI_PLACES=278, PETRI_TRANSITIONS=301} [2022-11-18 18:44:47,800 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 76 predicate places. [2022-11-18 18:44:47,800 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 301 transitions, 1864 flow [2022-11-18 18:44:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 193.36363636363637) internal successors, (2127), 11 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:47,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:44:47,801 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:47,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:48,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:48,011 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:44:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1564524413, now seen corresponding path program 1 times [2022-11-18 18:44:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775141830] [2022-11-18 18:44:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:49,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775141830] [2022-11-18 18:44:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775141830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702395548] [2022-11-18 18:44:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:49,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:49,999 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:50,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:44:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:44:50,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:51,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:53,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702395548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:53,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:53,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 58 [2022-11-18 18:44:53,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919840164] [2022-11-18 18:44:53,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:53,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-18 18:44:53,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:53,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-18 18:44:53,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3131, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 18:44:53,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 220 [2022-11-18 18:44:53,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 301 transitions, 1864 flow. Second operand has 58 states, 58 states have (on average 144.63793103448276) internal successors, (8389), 58 states have internal predecessors, (8389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:53,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:44:53,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 220 [2022-11-18 18:44:53,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:08,644 INFO L130 PetriNetUnfolder]: 6750/30009 cut-off events. [2022-11-18 18:45:08,644 INFO L131 PetriNetUnfolder]: For 9557/9584 co-relation queries the response was YES. [2022-11-18 18:45:08,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49757 conditions, 30009 events. 6750/30009 cut-off events. For 9557/9584 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 368209 event pairs, 1399 based on Foata normal form. 15/28279 useless extension candidates. Maximal degree in co-relation 49728. Up to 6445 conditions per place. [2022-11-18 18:45:08,836 INFO L137 encePairwiseOnDemand]: 187/220 looper letters, 463 selfloop transitions, 120 changer transitions 6/825 dead transitions. [2022-11-18 18:45:08,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 825 transitions, 4240 flow [2022-11-18 18:45:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 18:45:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-18 18:45:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 9536 transitions. [2022-11-18 18:45:08,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.688023088023088 [2022-11-18 18:45:08,850 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 9536 transitions. [2022-11-18 18:45:08,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 9536 transitions. [2022-11-18 18:45:08,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:08,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 9536 transitions. [2022-11-18 18:45:08,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 151.36507936507937) internal successors, (9536), 63 states have internal predecessors, (9536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:08,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 220.0) internal successors, (14080), 64 states have internal predecessors, (14080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:08,895 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 220.0) internal successors, (14080), 64 states have internal predecessors, (14080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:08,895 INFO L175 Difference]: Start difference. First operand has 278 places, 301 transitions, 1864 flow. Second operand 63 states and 9536 transitions. [2022-11-18 18:45:08,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 825 transitions, 4240 flow [2022-11-18 18:45:08,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 825 transitions, 4110 flow, removed 30 selfloop flow, removed 7 redundant places. [2022-11-18 18:45:08,967 INFO L231 Difference]: Finished difference. Result has 375 places, 421 transitions, 2631 flow [2022-11-18 18:45:08,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2631, PETRI_PLACES=375, PETRI_TRANSITIONS=421} [2022-11-18 18:45:08,968 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 173 predicate places. [2022-11-18 18:45:08,969 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 421 transitions, 2631 flow [2022-11-18 18:45:08,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 144.63793103448276) internal successors, (8389), 58 states have internal predecessors, (8389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:08,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:08,972 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:08,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:09,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:09,178 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:45:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2000946413, now seen corresponding path program 2 times [2022-11-18 18:45:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:09,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418528632] [2022-11-18 18:45:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:10,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418528632] [2022-11-18 18:45:10,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418528632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:45:10,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344647641] [2022-11-18 18:45:10,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:10,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:10,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:45:10,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:45:10,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:45:10,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:45:10,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:11,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:13,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344647641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:13,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:13,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2022-11-18 18:45:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605986389] [2022-11-18 18:45:13,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 18:45:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:13,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 18:45:13,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 18:45:13,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 220 [2022-11-18 18:45:13,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 421 transitions, 2631 flow. Second operand has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:13,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:13,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 220 [2022-11-18 18:45:13,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:24,257 INFO L130 PetriNetUnfolder]: 6157/31607 cut-off events. [2022-11-18 18:45:24,258 INFO L131 PetriNetUnfolder]: For 63723/64115 co-relation queries the response was YES. [2022-11-18 18:45:24,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74953 conditions, 31607 events. 6157/31607 cut-off events. For 63723/64115 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 400475 event pairs, 1970 based on Foata normal form. 46/29647 useless extension candidates. Maximal degree in co-relation 74885. Up to 9424 conditions per place. [2022-11-18 18:45:24,600 INFO L137 encePairwiseOnDemand]: 194/220 looper letters, 357 selfloop transitions, 86 changer transitions 6/698 dead transitions. [2022-11-18 18:45:24,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 698 transitions, 5196 flow [2022-11-18 18:45:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 18:45:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-18 18:45:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6373 transitions. [2022-11-18 18:45:24,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7242045454545455 [2022-11-18 18:45:24,611 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6373 transitions. [2022-11-18 18:45:24,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6373 transitions. [2022-11-18 18:45:24,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:24,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6373 transitions. [2022-11-18 18:45:24,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 159.325) internal successors, (6373), 40 states have internal predecessors, (6373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:24,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 220.0) internal successors, (9020), 41 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:24,814 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 220.0) internal successors, (9020), 41 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:24,814 INFO L175 Difference]: Start difference. First operand has 375 places, 421 transitions, 2631 flow. Second operand 40 states and 6373 transitions. [2022-11-18 18:45:24,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 698 transitions, 5196 flow [2022-11-18 18:45:25,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 698 transitions, 5017 flow, removed 58 selfloop flow, removed 9 redundant places. [2022-11-18 18:45:25,079 INFO L231 Difference]: Finished difference. Result has 434 places, 497 transitions, 3420 flow [2022-11-18 18:45:25,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3420, PETRI_PLACES=434, PETRI_TRANSITIONS=497} [2022-11-18 18:45:25,080 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 232 predicate places. [2022-11-18 18:45:25,080 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 497 transitions, 3420 flow [2022-11-18 18:45:25,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:25,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:25,082 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:25,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:25,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:45:25,288 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:45:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2045398733, now seen corresponding path program 3 times [2022-11-18 18:45:25,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:25,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539508277] [2022-11-18 18:45:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:26,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539508277] [2022-11-18 18:45:26,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539508277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:45:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76958449] [2022-11-18 18:45:26,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:45:26,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:26,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:26,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:45:26,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:45:26,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 18:45:26,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:26,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:45:26,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:27,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:29,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76958449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:29,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:29,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2022-11-18 18:45:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586825834] [2022-11-18 18:45:29,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 18:45:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 18:45:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 18:45:29,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 220 [2022-11-18 18:45:29,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 497 transitions, 3420 flow. Second operand has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:29,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:29,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 220 [2022-11-18 18:45:29,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:45:43,291 INFO L130 PetriNetUnfolder]: 7143/38016 cut-off events. [2022-11-18 18:45:43,291 INFO L131 PetriNetUnfolder]: For 120442/121018 co-relation queries the response was YES. [2022-11-18 18:45:43,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98644 conditions, 38016 events. 7143/38016 cut-off events. For 120442/121018 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 502805 event pairs, 1746 based on Foata normal form. 130/35776 useless extension candidates. Maximal degree in co-relation 98548. Up to 10385 conditions per place. [2022-11-18 18:45:43,839 INFO L137 encePairwiseOnDemand]: 194/220 looper letters, 397 selfloop transitions, 144 changer transitions 6/796 dead transitions. [2022-11-18 18:45:43,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 796 transitions, 6869 flow [2022-11-18 18:45:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:45:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:45:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7168 transitions. [2022-11-18 18:45:43,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.724040404040404 [2022-11-18 18:45:43,859 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7168 transitions. [2022-11-18 18:45:43,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7168 transitions. [2022-11-18 18:45:43,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:45:43,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7168 transitions. [2022-11-18 18:45:43,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 159.2888888888889) internal successors, (7168), 45 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 220.0) internal successors, (10120), 46 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,904 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 220.0) internal successors, (10120), 46 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:43,906 INFO L175 Difference]: Start difference. First operand has 434 places, 497 transitions, 3420 flow. Second operand 45 states and 7168 transitions. [2022-11-18 18:45:43,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 796 transitions, 6869 flow [2022-11-18 18:45:44,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 796 transitions, 6429 flow, removed 218 selfloop flow, removed 5 redundant places. [2022-11-18 18:45:44,740 INFO L231 Difference]: Finished difference. Result has 493 places, 566 transitions, 4355 flow [2022-11-18 18:45:44,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4355, PETRI_PLACES=493, PETRI_TRANSITIONS=566} [2022-11-18 18:45:44,751 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, 291 predicate places. [2022-11-18 18:45:44,751 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 566 transitions, 4355 flow [2022-11-18 18:45:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 153.55555555555554) internal successors, (6910), 45 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:44,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:45:44,753 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:44,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:45:44,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:45:44,960 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:45:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -571332889, now seen corresponding path program 4 times [2022-11-18 18:45:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:44,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669268354] [2022-11-18 18:45:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:46,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:46,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669268354] [2022-11-18 18:45:46,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669268354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:45:46,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335543910] [2022-11-18 18:45:46,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:45:46,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:46,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:46,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:45:46,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6991ee3a-931a-480f-9605-240c3f72f744/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:45:46,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:45:46,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:46,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 18:45:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:49,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335543910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:49,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:49,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 58 [2022-11-18 18:45:49,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666560958] [2022-11-18 18:45:49,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:49,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-18 18:45:49,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:49,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-18 18:45:49,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3132, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 18:45:49,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 220 [2022-11-18 18:45:49,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 566 transitions, 4355 flow. Second operand has 58 states, 58 states have (on average 144.63793103448276) internal successors, (8389), 58 states have internal predecessors, (8389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:49,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:45:49,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 220 [2022-11-18 18:45:49,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:46:14,783 INFO L130 PetriNetUnfolder]: 11462/49695 cut-off events. [2022-11-18 18:46:14,783 INFO L131 PetriNetUnfolder]: For 206279/207007 co-relation queries the response was YES. [2022-11-18 18:46:15,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144953 conditions, 49695 events. 11462/49695 cut-off events. For 206279/207007 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 669598 event pairs, 2779 based on Foata normal form. 182/46871 useless extension candidates. Maximal degree in co-relation 144836. Up to 11819 conditions per place. [2022-11-18 18:46:15,639 INFO L137 encePairwiseOnDemand]: 187/220 looper letters, 645 selfloop transitions, 192 changer transitions 6/1079 dead transitions. [2022-11-18 18:46:15,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1079 transitions, 9967 flow [2022-11-18 18:46:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-18 18:46:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-18 18:46:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 10398 transitions. [2022-11-18 18:46:15,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6849802371541502 [2022-11-18 18:46:15,664 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 10398 transitions. [2022-11-18 18:46:15,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 10398 transitions. [2022-11-18 18:46:15,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:46:15,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 10398 transitions. [2022-11-18 18:46:15,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 150.69565217391303) internal successors, (10398), 69 states have internal predecessors, (10398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:15,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 220.0) internal successors, (15400), 70 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:15,713 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 220.0) internal successors, (15400), 70 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:46:15,714 INFO L175 Difference]: Start difference. First operand has 493 places, 566 transitions, 4355 flow. Second operand 69 states and 10398 transitions. [2022-11-18 18:46:15,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1079 transitions, 9967 flow