./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN --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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- 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-6b4ec56 [2022-11-20 12:28:01,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:28:01,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:28:01,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:28:01,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:28:01,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:28:01,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:28:01,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:28:01,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:28:01,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:28:01,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:28:01,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:28:01,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:28:01,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:28:01,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:28:01,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:28:01,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:28:01,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:28:01,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:28:01,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:28:01,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:28:01,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:28:01,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:28:01,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:28:01,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:28:01,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:28:01,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:28:01,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:28:01,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:28:01,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:28:01,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:28:01,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:28:01,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:28:01,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:28:01,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:28:01,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:28:01,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:28:01,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:28:01,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:28:01,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:28:01,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:28:01,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:28:01,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:28:01,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:28:01,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:28:01,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:28:01,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:28:01,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:28:01,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:28:01,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:28:01,697 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:28:01,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:28:01,698 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:28:01,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:28:01,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:28:01,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:28:01,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:28:01,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:28:01,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:28:01,699 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:28:01,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:28:01,700 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:28:01,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:28:01,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:28:01,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:28:01,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:28:01,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:28:01,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:28:01,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:28:01,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:28:01,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:28:01,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:28:01,702 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:28:01,703 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:28:01,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:28:01,703 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_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-11-20 12:28:02,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:28:02,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:28:02,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:28:02,044 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:28:02,044 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:28:02,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-20 12:28:05,096 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:28:05,316 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:28:05,317 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-20 12:28:05,323 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/data/cdcd1ea8a/144c0aa800904a9ba29bc39a6f9b4cec/FLAG455193616 [2022-11-20 12:28:05,336 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/data/cdcd1ea8a/144c0aa800904a9ba29bc39a6f9b4cec [2022-11-20 12:28:05,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:28:05,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:28:05,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:28:05,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:28:05,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:28:05,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9ffdd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05, skipping insertion in model container [2022-11-20 12:28:05,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:28:05,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:28:05,531 WARN L237 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_f72b348f-b50d-44e7-9ae3-700a582b6342/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-20 12:28:05,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:28:05,543 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:28:05,560 WARN L237 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_f72b348f-b50d-44e7-9ae3-700a582b6342/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-20 12:28:05,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:28:05,573 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:28:05,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05 WrapperNode [2022-11-20 12:28:05,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:28:05,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:28:05,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:28:05,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:28:05,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,602 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-11-20 12:28:05,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:28:05,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:28:05,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:28:05,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:28:05,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,622 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:28:05,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:28:05,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:28:05,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:28:05,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (1/1) ... [2022-11-20 12:28:05,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:28:05,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:05,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:28:05,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:28:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:28:05,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:28:05,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:28:05,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:28:05,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:28:05,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:28:05,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:28:05,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:28:05,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:28:05,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:28:05,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:28:05,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:28:05,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:28:05,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:28:05,720 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:28:05,814 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:28:05,817 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:28:05,986 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:28:06,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:28:06,078 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 12:28:06,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:28:06 BoogieIcfgContainer [2022-11-20 12:28:06,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:28:06,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:28:06,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:28:06,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:28:06,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:28:05" (1/3) ... [2022-11-20 12:28:06,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8ccd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:28:06, skipping insertion in model container [2022-11-20 12:28:06,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:05" (2/3) ... [2022-11-20 12:28:06,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8ccd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:28:06, skipping insertion in model container [2022-11-20 12:28:06,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:28:06" (3/3) ... [2022-11-20 12:28:06,134 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-20 12:28:06,143 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:28:06,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:28:06,180 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:28:06,180 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:28:06,279 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:28:06,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-20 12:28:06,377 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-20 12:28:06,377 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:28:06,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-20 12:28:06,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-20 12:28:06,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-20 12:28:06,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:28:06,405 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;@10c49c63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:28:06,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 12:28:06,434 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-11-20 12:28:06,434 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:28:06,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:06,435 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] [2022-11-20 12:28:06,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1282531609, now seen corresponding path program 1 times [2022-11-20 12:28:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045492097] [2022-11-20 12:28:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:06,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:06,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045492097] [2022-11-20 12:28:06,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045492097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:06,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:06,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:28:06,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352267342] [2022-11-20 12:28:06,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:06,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:28:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:28:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:28:06,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-11-20 12:28:06,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:06,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:06,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-11-20 12:28:06,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:06,792 INFO L130 PetriNetUnfolder]: 4/76 cut-off events. [2022-11-20 12:28:06,792 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-20 12:28:06,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 7/78 useless extension candidates. Maximal degree in co-relation 49. Up to 9 conditions per place. [2022-11-20 12:28:06,794 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-11-20 12:28:06,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-11-20 12:28:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:28:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:28:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-11-20 12:28:06,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-11-20 12:28:06,809 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-11-20 12:28:06,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-11-20 12:28:06,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:06,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-11-20 12:28:06,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:06,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:06,820 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:06,822 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-11-20 12:28:06,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-11-20 12:28:06,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:28:06,829 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-11-20 12:28:06,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-20 12:28:06,835 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-20 12:28:06,835 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-11-20 12:28:06,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:06,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:06,836 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] [2022-11-20 12:28:06,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:28:06,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-11-20 12:28:06,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:06,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981857067] [2022-11-20 12:28:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:06,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:07,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:07,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981857067] [2022-11-20 12:28:07,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981857067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:07,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:07,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:28:07,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702880252] [2022-11-20 12:28:07,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:07,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:07,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:07,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:28:07,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-11-20 12:28:07,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:07,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-11-20 12:28:07,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:07,483 INFO L130 PetriNetUnfolder]: 50/172 cut-off events. [2022-11-20 12:28:07,483 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 12:28:07,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 172 events. 50/172 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 491 event pairs, 19 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 284. Up to 69 conditions per place. [2022-11-20 12:28:07,485 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-11-20 12:28:07,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-11-20 12:28:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 12:28:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-11-20 12:28:07,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-20 12:28:07,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-11-20 12:28:07,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-11-20 12:28:07,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:07,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-11-20 12:28:07,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,495 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,496 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-11-20 12:28:07,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-11-20 12:28:07,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:28:07,499 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-11-20 12:28:07,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-20 12:28:07,500 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-11-20 12:28:07,500 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-11-20 12:28:07,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:07,501 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] [2022-11-20 12:28:07,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:28:07,502 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-11-20 12:28:07,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:07,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145858961] [2022-11-20 12:28:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:07,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145858961] [2022-11-20 12:28:07,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145858961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:07,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792085376] [2022-11-20 12:28:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:07,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:07,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:07,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:07,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:28:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:28:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:08,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:08,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792085376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:08,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:08,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-11-20 12:28:08,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899105455] [2022-11-20 12:28:08,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:08,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:28:08,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:08,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:28:08,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:28:08,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-11-20 12:28:08,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:08,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:08,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-11-20 12:28:08,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:08,441 INFO L130 PetriNetUnfolder]: 91/351 cut-off events. [2022-11-20 12:28:08,441 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-20 12:28:08,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 351 events. 91/351 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1530 event pairs, 5 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 621. Up to 59 conditions per place. [2022-11-20 12:28:08,445 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-11-20 12:28:08,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-11-20 12:28:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:28:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 12:28:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-11-20 12:28:08,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-11-20 12:28:08,449 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-11-20 12:28:08,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-11-20 12:28:08,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:08,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-11-20 12:28:08,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.4) internal successors, (704), 10 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:08,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:08,456 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:08,457 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-11-20 12:28:08,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-11-20 12:28:08,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:28:08,460 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-11-20 12:28:08,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-11-20 12:28:08,462 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-11-20 12:28:08,462 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-11-20 12:28:08,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:08,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:08,463 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] [2022-11-20 12:28:08,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:08,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:08,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash -628521019, now seen corresponding path program 2 times [2022-11-20 12:28:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:08,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727097696] [2022-11-20 12:28:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:08,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:08,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727097696] [2022-11-20 12:28:08,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727097696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:08,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273783037] [2022-11-20 12:28:08,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:28:08,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:08,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:08,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:08,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:28:08,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:28:08,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:08,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:28:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:28:09,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:28:09,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273783037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:09,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:28:09,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-11-20 12:28:09,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809231993] [2022-11-20 12:28:09,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:09,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:09,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:28:09,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-11-20 12:28:09,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:09,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:09,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-11-20 12:28:09,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:09,439 INFO L130 PetriNetUnfolder]: 69/267 cut-off events. [2022-11-20 12:28:09,439 INFO L131 PetriNetUnfolder]: For 413/419 co-relation queries the response was YES. [2022-11-20 12:28:09,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 267 events. 69/267 cut-off events. For 413/419 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1032 event pairs, 15 based on Foata normal form. 12/271 useless extension candidates. Maximal degree in co-relation 706. Up to 68 conditions per place. [2022-11-20 12:28:09,445 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-11-20 12:28:09,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-11-20 12:28:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:28:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 12:28:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-11-20 12:28:09,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-11-20 12:28:09,448 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-11-20 12:28:09,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-11-20 12:28:09,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:09,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-11-20 12:28:09,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:09,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:09,452 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:09,452 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-11-20 12:28:09,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-11-20 12:28:09,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:28:09,460 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-11-20 12:28:09,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2022-11-20 12:28:09,461 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-11-20 12:28:09,461 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-11-20 12:28:09,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:09,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:09,462 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] [2022-11-20 12:28:09,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:09,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:09,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1426240687, now seen corresponding path program 1 times [2022-11-20 12:28:09,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:09,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363507321] [2022-11-20 12:28:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:09,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363507321] [2022-11-20 12:28:09,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363507321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847170822] [2022-11-20 12:28:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:09,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:09,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:09,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:28:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:28:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:10,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:10,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847170822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:10,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:10,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-20 12:28:10,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947723862] [2022-11-20 12:28:10,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:28:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:28:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:28:10,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-11-20 12:28:10,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 371 flow. Second operand has 10 states, 10 states have (on average 65.9) internal successors, (659), 10 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:10,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-11-20 12:28:10,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:10,716 INFO L130 PetriNetUnfolder]: 137/430 cut-off events. [2022-11-20 12:28:10,716 INFO L131 PetriNetUnfolder]: For 907/913 co-relation queries the response was YES. [2022-11-20 12:28:10,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 430 events. 137/430 cut-off events. For 907/913 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2064 event pairs, 13 based on Foata normal form. 14/438 useless extension candidates. Maximal degree in co-relation 1312. Up to 104 conditions per place. [2022-11-20 12:28:10,721 INFO L137 encePairwiseOnDemand]: 77/84 looper letters, 50 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2022-11-20 12:28:10,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 142 transitions, 856 flow [2022-11-20 12:28:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:28:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 12:28:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-11-20 12:28:10,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8184523809523809 [2022-11-20 12:28:10,724 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-11-20 12:28:10,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-11-20 12:28:10,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:10,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-11-20 12:28:10,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,728 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,728 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 8 states and 550 transitions. [2022-11-20 12:28:10,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 142 transitions, 856 flow [2022-11-20 12:28:10,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 142 transitions, 812 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-20 12:28:10,737 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 694 flow [2022-11-20 12:28:10,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2022-11-20 12:28:10,738 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-11-20 12:28:10,738 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 694 flow [2022-11-20 12:28:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.9) internal successors, (659), 10 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:10,739 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] [2022-11-20 12:28:10,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:10,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:10,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash -400015733, now seen corresponding path program 2 times [2022-11-20 12:28:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:10,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402309489] [2022-11-20 12:28:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:11,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:11,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402309489] [2022-11-20 12:28:11,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402309489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:11,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021777980] [2022-11-20 12:28:11,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:28:11,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:11,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:11,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:11,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:28:11,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:28:11,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:28:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:11,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:28:11,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021777980] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:11,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:28:11,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 7] total 15 [2022-11-20 12:28:11,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817218617] [2022-11-20 12:28:11,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:11,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:11,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:28:11,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-11-20 12:28:11,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:11,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:11,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-11-20 12:28:11,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:12,142 INFO L130 PetriNetUnfolder]: 136/582 cut-off events. [2022-11-20 12:28:12,142 INFO L131 PetriNetUnfolder]: For 1724/1775 co-relation queries the response was YES. [2022-11-20 12:28:12,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 582 events. 136/582 cut-off events. For 1724/1775 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3454 event pairs, 13 based on Foata normal form. 22/595 useless extension candidates. Maximal degree in co-relation 1879. Up to 92 conditions per place. [2022-11-20 12:28:12,148 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 40 selfloop transitions, 18 changer transitions 8/145 dead transitions. [2022-11-20 12:28:12,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1017 flow [2022-11-20 12:28:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 12:28:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-11-20 12:28:12,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7837301587301587 [2022-11-20 12:28:12,150 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-11-20 12:28:12,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-11-20 12:28:12,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:12,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-11-20 12:28:12,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:12,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:12,153 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:12,153 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 694 flow. Second operand 6 states and 395 transitions. [2022-11-20 12:28:12,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1017 flow [2022-11-20 12:28:12,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 1011 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 12:28:12,163 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 895 flow [2022-11-20 12:28:12,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=895, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2022-11-20 12:28:12,166 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2022-11-20 12:28:12,166 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 895 flow [2022-11-20 12:28:12,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:12,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:12,167 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:12,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 12:28:12,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1573734619, now seen corresponding path program 3 times [2022-11-20 12:28:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:12,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341575036] [2022-11-20 12:28:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341575036] [2022-11-20 12:28:12,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341575036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771182697] [2022-11-20 12:28:12,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:28:12,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:12,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:12,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:12,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:28:12,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:28:12,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:28:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:13,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:13,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771182697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:13,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:13,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-11-20 12:28:13,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545249978] [2022-11-20 12:28:13,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:13,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:28:13,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:13,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:28:13,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:28:13,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:28:13,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 895 flow. Second operand has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:13,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:13,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:28:13,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:16,051 INFO L130 PetriNetUnfolder]: 512/1621 cut-off events. [2022-11-20 12:28:16,051 INFO L131 PetriNetUnfolder]: For 7632/7638 co-relation queries the response was YES. [2022-11-20 12:28:16,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1621 events. 512/1621 cut-off events. For 7632/7638 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11876 event pairs, 6 based on Foata normal form. 34/1652 useless extension candidates. Maximal degree in co-relation 6442. Up to 284 conditions per place. [2022-11-20 12:28:16,068 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 97 selfloop transitions, 225 changer transitions 13/390 dead transitions. [2022-11-20 12:28:16,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 390 transitions, 4034 flow [2022-11-20 12:28:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 12:28:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-20 12:28:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3374 transitions. [2022-11-20 12:28:16,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7875816993464052 [2022-11-20 12:28:16,077 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3374 transitions. [2022-11-20 12:28:16,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3374 transitions. [2022-11-20 12:28:16,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:16,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3374 transitions. [2022-11-20 12:28:16,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 66.15686274509804) internal successors, (3374), 51 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:16,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:16,097 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:16,097 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 895 flow. Second operand 51 states and 3374 transitions. [2022-11-20 12:28:16,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 390 transitions, 4034 flow [2022-11-20 12:28:16,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 390 transitions, 4028 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-20 12:28:16,123 INFO L231 Difference]: Finished difference. Result has 179 places, 314 transitions, 3551 flow [2022-11-20 12:28:16,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3551, PETRI_PLACES=179, PETRI_TRANSITIONS=314} [2022-11-20 12:28:16,124 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 105 predicate places. [2022-11-20 12:28:16,124 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 314 transitions, 3551 flow [2022-11-20 12:28:16,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:16,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:16,125 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:16,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:16,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:16,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -669652269, now seen corresponding path program 4 times [2022-11-20 12:28:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:16,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520612466] [2022-11-20 12:28:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:16,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:16,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520612466] [2022-11-20 12:28:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520612466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:16,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791064044] [2022-11-20 12:28:16,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:28:16,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:16,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:16,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:16,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:28:16,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:28:16,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:28:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:16,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:17,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791064044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:17,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:17,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-11-20 12:28:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413944249] [2022-11-20 12:28:17,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:17,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:28:17,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:28:17,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:28:17,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 12:28:17,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 314 transitions, 3551 flow. Second operand has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:17,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:17,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 12:28:17,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:19,614 INFO L130 PetriNetUnfolder]: 675/1989 cut-off events. [2022-11-20 12:28:19,615 INFO L131 PetriNetUnfolder]: For 32792/32792 co-relation queries the response was YES. [2022-11-20 12:28:19,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11416 conditions, 1989 events. 675/1989 cut-off events. For 32792/32792 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14881 event pairs, 22 based on Foata normal form. 31/2017 useless extension candidates. Maximal degree in co-relation 11373. Up to 346 conditions per place. [2022-11-20 12:28:19,639 INFO L137 encePairwiseOnDemand]: 73/84 looper letters, 165 selfloop transitions, 357 changer transitions 10/573 dead transitions. [2022-11-20 12:28:19,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 573 transitions, 8099 flow [2022-11-20 12:28:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 12:28:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 12:28:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2170 transitions. [2022-11-20 12:28:19,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2022-11-20 12:28:19,646 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2170 transitions. [2022-11-20 12:28:19,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2170 transitions. [2022-11-20 12:28:19,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:19,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2170 transitions. [2022-11-20 12:28:19,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.64102564102564) internal successors, (2170), 39 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:19,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:19,664 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:19,664 INFO L175 Difference]: Start difference. First operand has 179 places, 314 transitions, 3551 flow. Second operand 39 states and 2170 transitions. [2022-11-20 12:28:19,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 573 transitions, 8099 flow [2022-11-20 12:28:19,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 573 transitions, 7815 flow, removed 123 selfloop flow, removed 1 redundant places. [2022-11-20 12:28:19,810 INFO L231 Difference]: Finished difference. Result has 237 places, 478 transitions, 6782 flow [2022-11-20 12:28:19,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6782, PETRI_PLACES=237, PETRI_TRANSITIONS=478} [2022-11-20 12:28:19,814 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 163 predicate places. [2022-11-20 12:28:19,814 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 478 transitions, 6782 flow [2022-11-20 12:28:19,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:19,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:19,815 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:19,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:20,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:20,027 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1292017431, now seen corresponding path program 5 times [2022-11-20 12:28:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:20,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531091511] [2022-11-20 12:28:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:20,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:20,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531091511] [2022-11-20 12:28:20,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531091511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:20,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962024995] [2022-11-20 12:28:20,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:28:20,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:20,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:20,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:20,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:28:20,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 12:28:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:20,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:28:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:20,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:21,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962024995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:21,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:21,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-11-20 12:28:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34163411] [2022-11-20 12:28:21,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:28:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:21,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:28:21,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:28:21,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:28:21,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 478 transitions, 6782 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:21,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:21,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:28:21,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:22,851 INFO L130 PetriNetUnfolder]: 769/2454 cut-off events. [2022-11-20 12:28:22,851 INFO L131 PetriNetUnfolder]: For 62514/62542 co-relation queries the response was YES. [2022-11-20 12:28:22,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16405 conditions, 2454 events. 769/2454 cut-off events. For 62514/62542 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20356 event pairs, 16 based on Foata normal form. 17/2464 useless extension candidates. Maximal degree in co-relation 16339. Up to 450 conditions per place. [2022-11-20 12:28:22,885 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 259 selfloop transitions, 405 changer transitions 24/745 dead transitions. [2022-11-20 12:28:22,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 745 transitions, 12790 flow [2022-11-20 12:28:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:28:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 12:28:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1583 transitions. [2022-11-20 12:28:22,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.785218253968254 [2022-11-20 12:28:22,889 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1583 transitions. [2022-11-20 12:28:22,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1583 transitions. [2022-11-20 12:28:22,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:22,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1583 transitions. [2022-11-20 12:28:22,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.95833333333333) internal successors, (1583), 24 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:22,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:22,902 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:22,903 INFO L175 Difference]: Start difference. First operand has 237 places, 478 transitions, 6782 flow. Second operand 24 states and 1583 transitions. [2022-11-20 12:28:22,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 745 transitions, 12790 flow [2022-11-20 12:28:23,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 745 transitions, 12063 flow, removed 235 selfloop flow, removed 6 redundant places. [2022-11-20 12:28:23,255 INFO L231 Difference]: Finished difference. Result has 266 places, 664 transitions, 11526 flow [2022-11-20 12:28:23,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=6361, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11526, PETRI_PLACES=266, PETRI_TRANSITIONS=664} [2022-11-20 12:28:23,256 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 192 predicate places. [2022-11-20 12:28:23,257 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 664 transitions, 11526 flow [2022-11-20 12:28:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:23,258 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:23,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:23,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 12:28:23,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1598609715, now seen corresponding path program 6 times [2022-11-20 12:28:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:23,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564945273] [2022-11-20 12:28:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:23,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:23,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:23,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564945273] [2022-11-20 12:28:23,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564945273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:23,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550913953] [2022-11-20 12:28:23,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:28:23,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:23,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:23,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:24,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:28:24,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 12:28:24,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:28:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:24,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550913953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:24,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:24,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-20 12:28:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019931692] [2022-11-20 12:28:24,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:24,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:28:24,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:24,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:28:24,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:28:24,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:28:24,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 664 transitions, 11526 flow. Second operand has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:24,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:24,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:28:24,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:29,833 INFO L130 PetriNetUnfolder]: 920/3007 cut-off events. [2022-11-20 12:28:29,834 INFO L131 PetriNetUnfolder]: For 92261/92308 co-relation queries the response was YES. [2022-11-20 12:28:29,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21434 conditions, 3007 events. 920/3007 cut-off events. For 92261/92308 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26488 event pairs, 17 based on Foata normal form. 50/3045 useless extension candidates. Maximal degree in co-relation 21358. Up to 506 conditions per place. [2022-11-20 12:28:29,891 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 132 selfloop transitions, 761 changer transitions 28/978 dead transitions. [2022-11-20 12:28:29,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 978 transitions, 19461 flow [2022-11-20 12:28:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 12:28:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-20 12:28:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5288 transitions. [2022-11-20 12:28:29,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7771898883009994 [2022-11-20 12:28:29,902 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5288 transitions. [2022-11-20 12:28:29,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5288 transitions. [2022-11-20 12:28:29,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:29,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5288 transitions. [2022-11-20 12:28:29,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 65.28395061728395) internal successors, (5288), 81 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:29,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 84.0) internal successors, (6888), 82 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:29,930 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 84.0) internal successors, (6888), 82 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:29,931 INFO L175 Difference]: Start difference. First operand has 266 places, 664 transitions, 11526 flow. Second operand 81 states and 5288 transitions. [2022-11-20 12:28:29,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 978 transitions, 19461 flow [2022-11-20 12:28:30,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 978 transitions, 17872 flow, removed 753 selfloop flow, removed 7 redundant places. [2022-11-20 12:28:30,501 INFO L231 Difference]: Finished difference. Result has 364 places, 894 transitions, 17570 flow [2022-11-20 12:28:30,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10977, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=17570, PETRI_PLACES=364, PETRI_TRANSITIONS=894} [2022-11-20 12:28:30,503 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 290 predicate places. [2022-11-20 12:28:30,503 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 894 transitions, 17570 flow [2022-11-20 12:28:30,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:30,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:30,504 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:30,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 12:28:30,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:28:30,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash -163587521, now seen corresponding path program 7 times [2022-11-20 12:28:30,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:30,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364067345] [2022-11-20 12:28:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:30,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:30,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364067345] [2022-11-20 12:28:30,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364067345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025556598] [2022-11-20 12:28:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:28:30,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:30,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:30,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:31,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:28:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:28:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:31,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:31,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025556598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:31,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:31,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 21 [2022-11-20 12:28:31,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280571919] [2022-11-20 12:28:31,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:31,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:28:31,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:31,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:28:31,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:28:31,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 12:28:31,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 894 transitions, 17570 flow. Second operand has 21 states, 21 states have (on average 54.0) internal successors, (1134), 21 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:31,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:31,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 12:28:31,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:36,035 INFO L130 PetriNetUnfolder]: 1260/3553 cut-off events. [2022-11-20 12:28:36,035 INFO L131 PetriNetUnfolder]: For 79097/79097 co-relation queries the response was YES. [2022-11-20 12:28:36,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28790 conditions, 3553 events. 1260/3553 cut-off events. For 79097/79097 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 29756 event pairs, 38 based on Foata normal form. 23/3566 useless extension candidates. Maximal degree in co-relation 28690. Up to 725 conditions per place. [2022-11-20 12:28:36,090 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 358 selfloop transitions, 947 changer transitions 5/1351 dead transitions. [2022-11-20 12:28:36,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1351 transitions, 30006 flow [2022-11-20 12:28:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 12:28:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-20 12:28:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3849 transitions. [2022-11-20 12:28:36,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6545918367346939 [2022-11-20 12:28:36,098 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3849 transitions. [2022-11-20 12:28:36,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3849 transitions. [2022-11-20 12:28:36,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:36,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3849 transitions. [2022-11-20 12:28:36,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 54.98571428571429) internal successors, (3849), 70 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:36,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 84.0) internal successors, (5964), 71 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:36,118 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 84.0) internal successors, (5964), 71 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:36,118 INFO L175 Difference]: Start difference. First operand has 364 places, 894 transitions, 17570 flow. Second operand 70 states and 3849 transitions. [2022-11-20 12:28:36,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1351 transitions, 30006 flow [2022-11-20 12:28:36,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1351 transitions, 29520 flow, removed 153 selfloop flow, removed 11 redundant places. [2022-11-20 12:28:36,914 INFO L231 Difference]: Finished difference. Result has 446 places, 1288 transitions, 29632 flow [2022-11-20 12:28:36,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=16937, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=29632, PETRI_PLACES=446, PETRI_TRANSITIONS=1288} [2022-11-20 12:28:36,916 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 372 predicate places. [2022-11-20 12:28:36,916 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1288 transitions, 29632 flow [2022-11-20 12:28:36,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.0) internal successors, (1134), 21 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:36,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:36,917 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:36,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 12:28:37,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:28:37,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1582584107, now seen corresponding path program 8 times [2022-11-20 12:28:37,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:37,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623593576] [2022-11-20 12:28:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:37,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:37,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:37,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623593576] [2022-11-20 12:28:37,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623593576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174709277] [2022-11-20 12:28:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:28:37,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:37,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:37,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:28:37,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:28:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:28:37,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:37,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:38,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174709277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:38,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:38,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-20 12:28:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067504290] [2022-11-20 12:28:38,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:28:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:28:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:28:38,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:28:38,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1288 transitions, 29632 flow. Second operand has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:38,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:38,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:28:38,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:42,221 INFO L130 PetriNetUnfolder]: 1504/4173 cut-off events. [2022-11-20 12:28:42,221 INFO L131 PetriNetUnfolder]: For 120408/120410 co-relation queries the response was YES. [2022-11-20 12:28:42,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38820 conditions, 4173 events. 1504/4173 cut-off events. For 120408/120410 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 36012 event pairs, 29 based on Foata normal form. 13/4175 useless extension candidates. Maximal degree in co-relation 38687. Up to 858 conditions per place. [2022-11-20 12:28:42,282 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 457 selfloop transitions, 1105 changer transitions 18/1651 dead transitions. [2022-11-20 12:28:42,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1651 transitions, 41405 flow [2022-11-20 12:28:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 12:28:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-20 12:28:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3422 transitions. [2022-11-20 12:28:42,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7834249084249084 [2022-11-20 12:28:42,292 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3422 transitions. [2022-11-20 12:28:42,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3422 transitions. [2022-11-20 12:28:42,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:42,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3422 transitions. [2022-11-20 12:28:42,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 65.8076923076923) internal successors, (3422), 52 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:42,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:42,307 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:42,308 INFO L175 Difference]: Start difference. First operand has 446 places, 1288 transitions, 29632 flow. Second operand 52 states and 3422 transitions. [2022-11-20 12:28:42,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1651 transitions, 41405 flow [2022-11-20 12:28:43,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1651 transitions, 40702 flow, removed 297 selfloop flow, removed 10 redundant places. [2022-11-20 12:28:43,747 INFO L231 Difference]: Finished difference. Result has 498 places, 1575 transitions, 40380 flow [2022-11-20 12:28:43,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=28897, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=817, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=40380, PETRI_PLACES=498, PETRI_TRANSITIONS=1575} [2022-11-20 12:28:43,748 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 424 predicate places. [2022-11-20 12:28:43,748 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1575 transitions, 40380 flow [2022-11-20 12:28:43,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:43,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:43,749 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:43,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:28:43,950 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1785432957, now seen corresponding path program 9 times [2022-11-20 12:28:43,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:43,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046308928] [2022-11-20 12:28:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:44,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:44,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046308928] [2022-11-20 12:28:44,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046308928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:44,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687104110] [2022-11-20 12:28:44,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:28:44,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:44,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:44,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:44,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:28:44,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:28:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:28:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:44,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687104110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:44,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:44,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-20 12:28:44,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847825743] [2022-11-20 12:28:44,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:44,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:28:44,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:28:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:28:44,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:28:44,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1575 transitions, 40380 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:44,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:44,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:28:44,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:49,597 INFO L130 PetriNetUnfolder]: 1797/4907 cut-off events. [2022-11-20 12:28:49,598 INFO L131 PetriNetUnfolder]: For 177578/177580 co-relation queries the response was YES. [2022-11-20 12:28:49,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50479 conditions, 4907 events. 1797/4907 cut-off events. For 177578/177580 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 43388 event pairs, 63 based on Foata normal form. 7/4905 useless extension candidates. Maximal degree in co-relation 50331. Up to 1065 conditions per place. [2022-11-20 12:28:49,662 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 493 selfloop transitions, 1427 changer transitions 8/1999 dead transitions. [2022-11-20 12:28:49,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1999 transitions, 56028 flow [2022-11-20 12:28:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 12:28:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 12:28:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2564 transitions. [2022-11-20 12:28:49,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7826617826617827 [2022-11-20 12:28:49,667 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2564 transitions. [2022-11-20 12:28:49,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2564 transitions. [2022-11-20 12:28:49,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:49,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2564 transitions. [2022-11-20 12:28:49,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 65.74358974358974) internal successors, (2564), 39 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:49,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:49,678 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:49,678 INFO L175 Difference]: Start difference. First operand has 498 places, 1575 transitions, 40380 flow. Second operand 39 states and 2564 transitions. [2022-11-20 12:28:49,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1999 transitions, 56028 flow [2022-11-20 12:28:51,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1999 transitions, 55142 flow, removed 248 selfloop flow, removed 13 redundant places. [2022-11-20 12:28:51,708 INFO L231 Difference]: Finished difference. Result has 533 places, 1951 transitions, 56044 flow [2022-11-20 12:28:51,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=39805, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=56044, PETRI_PLACES=533, PETRI_TRANSITIONS=1951} [2022-11-20 12:28:51,710 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 459 predicate places. [2022-11-20 12:28:51,710 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1951 transitions, 56044 flow [2022-11-20 12:28:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:51,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:51,711 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:51,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:28:51,917 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1059613473, now seen corresponding path program 10 times [2022-11-20 12:28:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:51,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278228552] [2022-11-20 12:28:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:51,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:52,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278228552] [2022-11-20 12:28:52,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278228552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886698729] [2022-11-20 12:28:52,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:28:52,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:52,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:52,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:28:52,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:28:52,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:52,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:28:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:52,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:52,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886698729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:52,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:52,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-11-20 12:28:52,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690351155] [2022-11-20 12:28:52,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:52,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:28:52,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:28:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:28:52,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 12:28:52,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1951 transitions, 56044 flow. Second operand has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:52,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:52,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 12:28:52,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:00,023 INFO L130 PetriNetUnfolder]: 2100/5659 cut-off events. [2022-11-20 12:29:00,023 INFO L131 PetriNetUnfolder]: For 234355/234355 co-relation queries the response was YES. [2022-11-20 12:29:00,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63433 conditions, 5659 events. 2100/5659 cut-off events. For 234355/234355 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 51606 event pairs, 48 based on Foata normal form. 52/5702 useless extension candidates. Maximal degree in co-relation 63273. Up to 1306 conditions per place. [2022-11-20 12:29:00,101 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 653 selfloop transitions, 1773 changer transitions 4/2471 dead transitions. [2022-11-20 12:29:00,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 2471 transitions, 75896 flow [2022-11-20 12:29:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 12:29:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-20 12:29:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3129 transitions. [2022-11-20 12:29:00,107 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535087719298246 [2022-11-20 12:29:00,108 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3129 transitions. [2022-11-20 12:29:00,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3129 transitions. [2022-11-20 12:29:00,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:00,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3129 transitions. [2022-11-20 12:29:00,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 54.89473684210526) internal successors, (3129), 57 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:00,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:00,127 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:00,127 INFO L175 Difference]: Start difference. First operand has 533 places, 1951 transitions, 56044 flow. Second operand 57 states and 3129 transitions. [2022-11-20 12:29:00,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 2471 transitions, 75896 flow [2022-11-20 12:29:03,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 2471 transitions, 75060 flow, removed 253 selfloop flow, removed 13 redundant places. [2022-11-20 12:29:03,427 INFO L231 Difference]: Finished difference. Result has 593 places, 2382 transitions, 74963 flow [2022-11-20 12:29:03,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=55232, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=74963, PETRI_PLACES=593, PETRI_TRANSITIONS=2382} [2022-11-20 12:29:03,429 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 519 predicate places. [2022-11-20 12:29:03,429 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 2382 transitions, 74963 flow [2022-11-20 12:29:03,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:03,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:03,430 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:03,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:03,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:29:03,635 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1885125439, now seen corresponding path program 11 times [2022-11-20 12:29:03,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:03,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811986291] [2022-11-20 12:29:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:04,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:04,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811986291] [2022-11-20 12:29:04,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811986291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:04,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99970213] [2022-11-20 12:29:04,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:29:04,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:04,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:04,031 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:04,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:29:04,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:29:04,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:04,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:29:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:04,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:04,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99970213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:04,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:04,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2022-11-20 12:29:04,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291991283] [2022-11-20 12:29:04,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:04,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:29:04,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:29:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:29:04,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:29:04,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 2382 transitions, 74963 flow. Second operand has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:04,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:04,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:29:04,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:16,837 INFO L130 PetriNetUnfolder]: 2534/7105 cut-off events. [2022-11-20 12:29:16,838 INFO L131 PetriNetUnfolder]: For 335176/335180 co-relation queries the response was YES. [2022-11-20 12:29:16,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84823 conditions, 7105 events. 2534/7105 cut-off events. For 335176/335180 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 69447 event pairs, 35 based on Foata normal form. 40/7120 useless extension candidates. Maximal degree in co-relation 84648. Up to 1528 conditions per place. [2022-11-20 12:29:16,942 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 339 selfloop transitions, 2564 changer transitions 3/2994 dead transitions. [2022-11-20 12:29:16,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 2994 transitions, 100448 flow [2022-11-20 12:29:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 12:29:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-20 12:29:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5424 transitions. [2022-11-20 12:29:16,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7779690189328744 [2022-11-20 12:29:16,950 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5424 transitions. [2022-11-20 12:29:16,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5424 transitions. [2022-11-20 12:29:16,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:16,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5424 transitions. [2022-11-20 12:29:16,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 65.34939759036145) internal successors, (5424), 83 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:16,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 84.0) internal successors, (7056), 84 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:16,971 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 84.0) internal successors, (7056), 84 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:16,972 INFO L175 Difference]: Start difference. First operand has 593 places, 2382 transitions, 74963 flow. Second operand 83 states and 5424 transitions. [2022-11-20 12:29:16,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 2994 transitions, 100448 flow [2022-11-20 12:29:21,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 2994 transitions, 99708 flow, removed 198 selfloop flow, removed 14 redundant places. [2022-11-20 12:29:21,711 INFO L231 Difference]: Finished difference. Result has 678 places, 2921 transitions, 99783 flow [2022-11-20 12:29:21,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=74215, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2035, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=99783, PETRI_PLACES=678, PETRI_TRANSITIONS=2921} [2022-11-20 12:29:21,714 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 604 predicate places. [2022-11-20 12:29:21,714 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2921 transitions, 99783 flow [2022-11-20 12:29:21,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:21,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:21,715 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:21,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:21,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:21,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash 536604281, now seen corresponding path program 12 times [2022-11-20 12:29:21,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:21,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048860821] [2022-11-20 12:29:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:21,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:22,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:22,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048860821] [2022-11-20 12:29:22,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048860821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:22,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249711723] [2022-11-20 12:29:22,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:29:22,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:22,309 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:22,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:29:22,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 12:29:22,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:29:22,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:22,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:22,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249711723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:22,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:22,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-11-20 12:29:22,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363685767] [2022-11-20 12:29:22,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:22,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:29:22,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:29:22,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:29:22,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:29:22,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2921 transitions, 99783 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:22,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:22,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:29:22,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:34,045 INFO L130 PetriNetUnfolder]: 2588/7220 cut-off events. [2022-11-20 12:29:34,045 INFO L131 PetriNetUnfolder]: For 363354/363358 co-relation queries the response was YES. [2022-11-20 12:29:34,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92078 conditions, 7220 events. 2588/7220 cut-off events. For 363354/363358 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 70370 event pairs, 89 based on Foata normal form. 6/7210 useless extension candidates. Maximal degree in co-relation 91885. Up to 1548 conditions per place. [2022-11-20 12:29:34,159 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 331 selfloop transitions, 2626 changer transitions 7/3052 dead transitions. [2022-11-20 12:29:34,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 3052 transitions, 110231 flow [2022-11-20 12:29:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 12:29:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-11-20 12:29:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3848 transitions. [2022-11-20 12:29:34,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7764326069410815 [2022-11-20 12:29:34,165 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3848 transitions. [2022-11-20 12:29:34,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3848 transitions. [2022-11-20 12:29:34,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:34,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3848 transitions. [2022-11-20 12:29:34,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 65.22033898305085) internal successors, (3848), 59 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:34,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 84.0) internal successors, (5040), 60 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:34,180 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 84.0) internal successors, (5040), 60 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:34,180 INFO L175 Difference]: Start difference. First operand has 678 places, 2921 transitions, 99783 flow. Second operand 59 states and 3848 transitions. [2022-11-20 12:29:34,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 3052 transitions, 110231 flow [2022-11-20 12:29:40,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 3052 transitions, 107400 flow, removed 1066 selfloop flow, removed 27 redundant places. [2022-11-20 12:29:41,073 INFO L231 Difference]: Finished difference. Result has 719 places, 3028 transitions, 109726 flow [2022-11-20 12:29:41,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=97252, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=109726, PETRI_PLACES=719, PETRI_TRANSITIONS=3028} [2022-11-20 12:29:41,075 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 645 predicate places. [2022-11-20 12:29:41,075 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 3028 transitions, 109726 flow [2022-11-20 12:29:41,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:41,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:41,075 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:41,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:41,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:29:41,276 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1344498987, now seen corresponding path program 13 times [2022-11-20 12:29:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:41,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966171357] [2022-11-20 12:29:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:41,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:41,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966171357] [2022-11-20 12:29:41,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966171357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:41,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661020112] [2022-11-20 12:29:41,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:29:41,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:41,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:41,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:41,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:29:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:41,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:29:41,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:41,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:42,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661020112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:42,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:42,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-11-20 12:29:42,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133585168] [2022-11-20 12:29:42,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:42,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 12:29:42,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:42,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 12:29:42,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:29:42,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:29:42,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 3028 transitions, 109726 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:42,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:42,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:29:42,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:51,820 INFO L130 PetriNetUnfolder]: 2712/7389 cut-off events. [2022-11-20 12:29:51,820 INFO L131 PetriNetUnfolder]: For 357182/357184 co-relation queries the response was YES. [2022-11-20 12:29:51,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99387 conditions, 7389 events. 2712/7389 cut-off events. For 357182/357184 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 71282 event pairs, 94 based on Foata normal form. 1/7370 useless extension candidates. Maximal degree in co-relation 99194. Up to 1673 conditions per place. [2022-11-20 12:29:51,943 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 934 selfloop transitions, 2233 changer transitions 3/3258 dead transitions. [2022-11-20 12:29:51,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 3258 transitions, 124847 flow [2022-11-20 12:29:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 12:29:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-20 12:29:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1909 transitions. [2022-11-20 12:29:51,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7836617405582923 [2022-11-20 12:29:51,946 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1909 transitions. [2022-11-20 12:29:51,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1909 transitions. [2022-11-20 12:29:51,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:51,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1909 transitions. [2022-11-20 12:29:51,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.82758620689656) internal successors, (1909), 29 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:51,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:51,953 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:51,954 INFO L175 Difference]: Start difference. First operand has 719 places, 3028 transitions, 109726 flow. Second operand 29 states and 1909 transitions. [2022-11-20 12:29:51,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 3258 transitions, 124847 flow [2022-11-20 12:29:59,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 3258 transitions, 122902 flow, removed 160 selfloop flow, removed 21 redundant places. [2022-11-20 12:29:59,112 INFO L231 Difference]: Finished difference. Result has 728 places, 3245 transitions, 121678 flow [2022-11-20 12:29:59,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=107580, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2004, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=121678, PETRI_PLACES=728, PETRI_TRANSITIONS=3245} [2022-11-20 12:29:59,114 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 654 predicate places. [2022-11-20 12:29:59,114 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 3245 transitions, 121678 flow [2022-11-20 12:29:59,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:59,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:59,114 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:59,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:59,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:29:59,315 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1473743989, now seen corresponding path program 14 times [2022-11-20 12:29:59,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:59,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097496945] [2022-11-20 12:29:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:59,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:59,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097496945] [2022-11-20 12:29:59,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097496945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954379990] [2022-11-20 12:29:59,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:29:59,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:59,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:59,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:59,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:29:59,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:29:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:29:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:59,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:00,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954379990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:00,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:30:00,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 23 [2022-11-20 12:30:00,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115728281] [2022-11-20 12:30:00,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:00,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:30:00,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:30:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:30:00,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:30:00,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 12:30:00,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 3245 transitions, 121678 flow. Second operand has 23 states, 23 states have (on average 53.78260869565217) internal successors, (1237), 23 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:00,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:30:00,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 12:30:00,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:30:17,904 INFO L130 PetriNetUnfolder]: 3313/9220 cut-off events. [2022-11-20 12:30:17,905 INFO L131 PetriNetUnfolder]: For 450098/450098 co-relation queries the response was YES. [2022-11-20 12:30:17,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127545 conditions, 9220 events. 3313/9220 cut-off events. For 450098/450098 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 93628 event pairs, 96 based on Foata normal form. 58/9260 useless extension candidates. Maximal degree in co-relation 127349. Up to 2033 conditions per place. [2022-11-20 12:30:18,110 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 1378 selfloop transitions, 2799 changer transitions 47/4265 dead transitions. [2022-11-20 12:30:18,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 4265 transitions, 167927 flow [2022-11-20 12:30:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 12:30:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-20 12:30:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4116 transitions. [2022-11-20 12:30:18,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6621621621621622 [2022-11-20 12:30:18,116 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4116 transitions. [2022-11-20 12:30:18,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4116 transitions. [2022-11-20 12:30:18,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:30:18,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4116 transitions. [2022-11-20 12:30:18,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 55.62162162162162) internal successors, (4116), 74 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:18,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:18,132 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:18,132 INFO L175 Difference]: Start difference. First operand has 728 places, 3245 transitions, 121678 flow. Second operand 74 states and 4116 transitions. [2022-11-20 12:30:18,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 4265 transitions, 167927 flow [2022-11-20 12:30:27,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 4265 transitions, 166304 flow, removed 11 selfloop flow, removed 15 redundant places. [2022-11-20 12:30:28,171 INFO L231 Difference]: Finished difference. Result has 835 places, 4038 transitions, 163346 flow [2022-11-20 12:30:28,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=120239, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2077, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=163346, PETRI_PLACES=835, PETRI_TRANSITIONS=4038} [2022-11-20 12:30:28,174 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 761 predicate places. [2022-11-20 12:30:28,175 INFO L495 AbstractCegarLoop]: Abstraction has has 835 places, 4038 transitions, 163346 flow [2022-11-20 12:30:28,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.78260869565217) internal successors, (1237), 23 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:28,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:30:28,175 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:30:28,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:30:28,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:30:28,380 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:30:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:28,381 INFO L85 PathProgramCache]: Analyzing trace with hash -336423823, now seen corresponding path program 15 times [2022-11-20 12:30:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:30:28,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818395070] [2022-11-20 12:30:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:28,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:30:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:28,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:30:28,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818395070] [2022-11-20 12:30:28,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818395070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:30:28,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595370436] [2022-11-20 12:30:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:30:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:30:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:30:28,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:30:28,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:30:28,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:30:28,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:30:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:30:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:29,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:29,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595370436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:29,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:30:29,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-11-20 12:30:29,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355116644] [2022-11-20 12:30:29,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:29,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:30:29,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:30:29,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:30:29,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:30:29,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:30:29,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 4038 transitions, 163346 flow. Second operand has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:29,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:30:29,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:30:29,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:30:48,621 INFO L130 PetriNetUnfolder]: 3687/10314 cut-off events. [2022-11-20 12:30:48,621 INFO L131 PetriNetUnfolder]: For 605584/605591 co-relation queries the response was YES. [2022-11-20 12:30:48,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153787 conditions, 10314 events. 3687/10314 cut-off events. For 605584/605591 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 107660 event pairs, 59 based on Foata normal form. 55/10344 useless extension candidates. Maximal degree in co-relation 153538. Up to 2234 conditions per place. [2022-11-20 12:30:48,850 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 1150 selfloop transitions, 3283 changer transitions 0/4566 dead transitions. [2022-11-20 12:30:48,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 4566 transitions, 194484 flow [2022-11-20 12:30:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 12:30:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 12:30:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2264 transitions. [2022-11-20 12:30:48,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7927170868347339 [2022-11-20 12:30:48,853 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2264 transitions. [2022-11-20 12:30:48,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2264 transitions. [2022-11-20 12:30:48,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:30:48,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2264 transitions. [2022-11-20 12:30:48,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.58823529411765) internal successors, (2264), 34 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:48,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:48,861 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:48,861 INFO L175 Difference]: Start difference. First operand has 835 places, 4038 transitions, 163346 flow. Second operand 34 states and 2264 transitions. [2022-11-20 12:30:48,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 4566 transitions, 194484 flow [2022-11-20 12:31:04,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 4566 transitions, 192683 flow, removed 768 selfloop flow, removed 17 redundant places. [2022-11-20 12:31:04,340 INFO L231 Difference]: Finished difference. Result has 857 places, 4434 transitions, 192955 flow [2022-11-20 12:31:04,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=161514, PETRI_DIFFERENCE_MINUEND_PLACES=808, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=192955, PETRI_PLACES=857, PETRI_TRANSITIONS=4434} [2022-11-20 12:31:04,343 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 783 predicate places. [2022-11-20 12:31:04,343 INFO L495 AbstractCegarLoop]: Abstraction has has 857 places, 4434 transitions, 192955 flow [2022-11-20 12:31:04,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:04,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:31:04,344 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:31:04,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:31:04,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:31:04,549 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:31:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:31:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash 618954613, now seen corresponding path program 16 times [2022-11-20 12:31:04,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:31:04,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631442283] [2022-11-20 12:31:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:31:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:31:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631442283] [2022-11-20 12:31:04,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631442283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:31:04,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858718047] [2022-11-20 12:31:04,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:31:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:31:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:31:04,850 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:31:04,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:31:04,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:31:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:31:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 12:31:04,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:31:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:05,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:31:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:05,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858718047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:31:05,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:31:05,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-20 12:31:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303037185] [2022-11-20 12:31:05,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:31:05,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:31:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:31:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:31:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:31:05,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:31:05,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 857 places, 4434 transitions, 192955 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:05,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:31:05,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:31:05,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:31:29,006 INFO L130 PetriNetUnfolder]: 3705/10468 cut-off events. [2022-11-20 12:31:29,006 INFO L131 PetriNetUnfolder]: For 707974/707981 co-relation queries the response was YES. [2022-11-20 12:31:29,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161668 conditions, 10468 events. 3705/10468 cut-off events. For 707974/707981 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 109850 event pairs, 57 based on Foata normal form. 13/10458 useless extension candidates. Maximal degree in co-relation 161415. Up to 2234 conditions per place. [2022-11-20 12:31:29,314 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 726 selfloop transitions, 3655 changer transitions 10/4524 dead transitions. [2022-11-20 12:31:29,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 4524 transitions, 204945 flow [2022-11-20 12:31:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:31:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 12:31:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2634 transitions. [2022-11-20 12:31:29,318 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7839285714285714 [2022-11-20 12:31:29,318 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2634 transitions. [2022-11-20 12:31:29,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2634 transitions. [2022-11-20 12:31:29,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:31:29,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2634 transitions. [2022-11-20 12:31:29,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.85) internal successors, (2634), 40 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:29,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:29,327 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:29,327 INFO L175 Difference]: Start difference. First operand has 857 places, 4434 transitions, 192955 flow. Second operand 40 states and 2634 transitions. [2022-11-20 12:31:29,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 4524 transitions, 204945 flow [2022-11-20 12:31:47,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 4524 transitions, 204273 flow, removed 170 selfloop flow, removed 10 redundant places. [2022-11-20 12:31:47,572 INFO L231 Difference]: Finished difference. Result has 890 places, 4465 transitions, 203783 flow [2022-11-20 12:31:47,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=191553, PETRI_DIFFERENCE_MINUEND_PLACES=847, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=203783, PETRI_PLACES=890, PETRI_TRANSITIONS=4465} [2022-11-20 12:31:47,575 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 816 predicate places. [2022-11-20 12:31:47,575 INFO L495 AbstractCegarLoop]: Abstraction has has 890 places, 4465 transitions, 203783 flow [2022-11-20 12:31:47,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:47,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:31:47,576 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:31:47,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:31:47,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:31:47,776 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:31:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:31:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1014969681, now seen corresponding path program 17 times [2022-11-20 12:31:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:31:47,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241499502] [2022-11-20 12:31:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:31:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:48,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:31:48,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241499502] [2022-11-20 12:31:48,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241499502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:31:48,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508793119] [2022-11-20 12:31:48,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:31:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:31:48,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:31:48,111 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:31:48,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f72b348f-b50d-44e7-9ae3-700a582b6342/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:31:48,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:31:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:31:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:31:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:31:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:48,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:31:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:48,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508793119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:31:48,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:31:48,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2022-11-20 12:31:48,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949821965] [2022-11-20 12:31:48,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:31:48,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:31:48,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:31:48,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:31:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:31:48,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-20 12:31:48,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 890 places, 4465 transitions, 203783 flow. Second operand has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:48,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:31:48,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-20 12:31:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand