./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:01:26,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:01:26,387 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:01:26,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:01:26,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:01:26,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:01:26,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:01:26,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:01:26,431 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:01:26,431 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:01:26,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:01:26,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:01:26,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:01:26,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:01:26,439 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:01:26,439 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:01:26,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:01:26,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:01:26,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:01:26,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:01:26,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:01:26,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:01:26,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:01:26,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:01:26,442 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:01:26,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:01:26,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:01:26,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:01:26,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:01:26,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:01:26,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:01:26,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:01:26,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:01:26,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:01:26,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:01:26,448 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:01:26,449 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:01:26,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:01:26,449 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:01:26,449 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:01:26,450 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:01:26,450 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:01:26,450 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-10-31 22:01:26,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:01:26,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:01:26,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:01:26,772 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:01:26,773 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:01:26,774 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c Unable to find full path for "g++" [2024-10-31 22:01:28,859 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:01:29,098 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:01:29,099 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-10-31 22:01:29,110 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/data/49a64c215/e9d87bda0f3f4784b449c1324946ef2f/FLAG97e738a8f [2024-10-31 22:01:29,129 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/data/49a64c215/e9d87bda0f3f4784b449c1324946ef2f [2024-10-31 22:01:29,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:01:29,136 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:01:29,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:29,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:01:29,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:01:29,147 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7019bb79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29, skipping insertion in model container [2024-10-31 22:01:29,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,184 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:01:29,416 WARN L251 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_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-10-31 22:01:29,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:29,434 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:01:29,461 WARN L251 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_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-10-31 22:01:29,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:29,491 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:01:29,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29 WrapperNode [2024-10-31 22:01:29,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:29,494 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:29,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:01:29,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:01:29,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,518 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,542 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-10-31 22:01:29,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:29,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:01:29,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:01:29,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:01:29,560 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,564 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,595 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:01:29,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,607 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:01:29,629 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:01:29,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:01:29,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:01:29,631 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (1/1) ... [2024-10-31 22:01:29,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:01:29,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:29,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:01:29,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:01:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:01:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:01:29,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:01:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:01:29,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:01:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:01:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:01:29,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:01:29,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:01:29,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:01:29,742 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:01:29,884 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:01:29,891 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:01:30,171 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:01:30,171 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:01:30,336 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:01:30,336 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:01:30,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:30 BoogieIcfgContainer [2024-10-31 22:01:30,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:01:30,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:01:30,343 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:01:30,348 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:01:30,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:01:29" (1/3) ... [2024-10-31 22:01:30,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4fed34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:30, skipping insertion in model container [2024-10-31 22:01:30,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:29" (2/3) ... [2024-10-31 22:01:30,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4fed34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:30, skipping insertion in model container [2024-10-31 22:01:30,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:30" (3/3) ... [2024-10-31 22:01:30,357 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-10-31 22:01:30,382 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:01:30,384 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:01:30,384 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:01:30,484 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:01:30,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-31 22:01:30,609 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-31 22:01:30,610 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:01:30,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-31 22:01:30,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-31 22:01:30,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-31 22:01:30,641 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:01:30,653 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@c3a8f2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:01:30,653 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:01:30,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:01:30,676 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-31 22:01:30,677 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:01:30,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:30,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:30,681 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:30,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -724561697, now seen corresponding path program 1 times [2024-10-31 22:01:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:30,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513859265] [2024-10-31 22:01:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:30,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:31,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513859265] [2024-10-31 22:01:31,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513859265] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:31,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:31,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:01:31,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696647053] [2024-10-31 22:01:31,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:31,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:31,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:31,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:31,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-31 22:01:31,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:31,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:31,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-31 22:01:31,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:31,372 INFO L124 PetriNetUnfolderBase]: 70/138 cut-off events. [2024-10-31 22:01:31,373 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-31 22:01:31,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 138 events. 70/138 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 418 event pairs, 31 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 253. Up to 86 conditions per place. [2024-10-31 22:01:31,381 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-10-31 22:01:31,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2024-10-31 22:01:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-31 22:01:31,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-10-31 22:01:31,400 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2024-10-31 22:01:31,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2024-10-31 22:01:31,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:01:31,413 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-10-31 22:01:31,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-10-31 22:01:31,423 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-10-31 22:01:31,423 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-10-31 22:01:31,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:31,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:31,424 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:31,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:01:31,425 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:31,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash -332040435, now seen corresponding path program 1 times [2024-10-31 22:01:31,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:31,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838408884] [2024-10-31 22:01:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:31,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:31,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:31,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838408884] [2024-10-31 22:01:31,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838408884] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:31,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:31,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:01:31,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467218673] [2024-10-31 22:01:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:31,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:31,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-31 22:01:31,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:31,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:31,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-31 22:01:31,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:31,723 INFO L124 PetriNetUnfolderBase]: 89/180 cut-off events. [2024-10-31 22:01:31,723 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-10-31 22:01:31,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 180 events. 89/180 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 623 event pairs, 49 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2024-10-31 22:01:31,729 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-10-31 22:01:31,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2024-10-31 22:01:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-10-31 22:01:31,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-10-31 22:01:31,732 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2024-10-31 22:01:31,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2024-10-31 22:01:31,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:31,734 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-31 22:01:31,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-31 22:01:31,736 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-31 22:01:31,737 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-31 22:01:31,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:31,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:31,738 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:31,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:01:31,739 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:31,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash -585986627, now seen corresponding path program 1 times [2024-10-31 22:01:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:31,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396061508] [2024-10-31 22:01:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:31,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:01:32,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396061508] [2024-10-31 22:01:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396061508] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058474082] [2024-10-31 22:01:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:32,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:32,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:32,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:01:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:32,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:01:32,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:01:32,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:32,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058474082] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:32,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:01:32,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-10-31 22:01:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751056373] [2024-10-31 22:01:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:32,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:01:32,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:01:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:01:32,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-31 22:01:32,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:32,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:32,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-31 22:01:32,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:32,870 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-10-31 22:01:32,871 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-10-31 22:01:32,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 301 events. 153/301 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1135 event pairs, 23 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 236. Up to 97 conditions per place. [2024-10-31 22:01:32,877 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 5 changer transitions 3/46 dead transitions. [2024-10-31 22:01:32,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 46 transitions, 238 flow [2024-10-31 22:01:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-10-31 22:01:32,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2024-10-31 22:01:32,882 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 59 transitions. [2024-10-31 22:01:32,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 46 transitions, 238 flow [2024-10-31 22:01:32,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:32,888 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 98 flow [2024-10-31 22:01:32,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-10-31 22:01:32,891 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2024-10-31 22:01:32,891 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 98 flow [2024-10-31 22:01:32,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:32,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:32,892 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:32,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:01:33,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:33,101 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:33,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash -859289679, now seen corresponding path program 2 times [2024-10-31 22:01:33,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:33,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102063487] [2024-10-31 22:01:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:33,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:33,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102063487] [2024-10-31 22:01:33,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102063487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478011049] [2024-10-31 22:01:33,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:01:33,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:33,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:33,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:33,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:01:33,420 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:01:33,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:33,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:01:33,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:33,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:33,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478011049] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:33,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:33,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-31 22:01:33,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760786958] [2024-10-31 22:01:33,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:33,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:01:33,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:01:33,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:01:33,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-31 22:01:33,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:33,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:33,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-31 22:01:33,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:34,064 INFO L124 PetriNetUnfolderBase]: 286/530 cut-off events. [2024-10-31 22:01:34,064 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-10-31 22:01:34,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 530 events. 286/530 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2168 event pairs, 42 based on Foata normal form. 18/547 useless extension candidates. Maximal degree in co-relation 507. Up to 242 conditions per place. [2024-10-31 22:01:34,074 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-10-31 22:01:34,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 335 flow [2024-10-31 22:01:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:01:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:01:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-10-31 22:01:34,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-10-31 22:01:34,078 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 98 flow. Second operand 6 states and 64 transitions. [2024-10-31 22:01:34,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 335 flow [2024-10-31 22:01:34,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:34,083 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 219 flow [2024-10-31 22:01:34,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-10-31 22:01:34,084 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-10-31 22:01:34,085 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 219 flow [2024-10-31 22:01:34,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:34,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:34,085 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:34,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:01:34,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:34,286 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:34,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:34,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1514086461, now seen corresponding path program 3 times [2024-10-31 22:01:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:34,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104754336] [2024-10-31 22:01:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:34,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:34,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:34,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104754336] [2024-10-31 22:01:34,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104754336] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:34,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802432368] [2024-10-31 22:01:34,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:01:34,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:34,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:34,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:01:34,656 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:01:34,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:34,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:01:34,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:34,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:35,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802432368] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:35,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:35,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-31 22:01:35,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139211891] [2024-10-31 22:01:35,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:35,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:01:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:01:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:01:35,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:01:35,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 219 flow. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:35,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:35,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:01:35,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:36,322 INFO L124 PetriNetUnfolderBase]: 643/1108 cut-off events. [2024-10-31 22:01:36,323 INFO L125 PetriNetUnfolderBase]: For 1935/1935 co-relation queries the response was YES. [2024-10-31 22:01:36,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3765 conditions, 1108 events. 643/1108 cut-off events. For 1935/1935 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4887 event pairs, 20 based on Foata normal form. 38/1146 useless extension candidates. Maximal degree in co-relation 2620. Up to 229 conditions per place. [2024-10-31 22:01:36,333 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 140 selfloop transitions, 81 changer transitions 22/244 dead transitions. [2024-10-31 22:01:36,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 244 transitions, 1705 flow [2024-10-31 22:01:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-31 22:01:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-10-31 22:01:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 330 transitions. [2024-10-31 22:01:36,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40293040293040294 [2024-10-31 22:01:36,338 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 219 flow. Second operand 39 states and 330 transitions. [2024-10-31 22:01:36,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 244 transitions, 1705 flow [2024-10-31 22:01:36,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 244 transitions, 1697 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:36,353 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 966 flow [2024-10-31 22:01:36,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=966, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-10-31 22:01:36,354 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 72 predicate places. [2024-10-31 22:01:36,355 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 966 flow [2024-10-31 22:01:36,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:36,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:36,356 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:36,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:01:36,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:36,560 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:36,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 770529667, now seen corresponding path program 4 times [2024-10-31 22:01:36,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:36,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780725307] [2024-10-31 22:01:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780725307] [2024-10-31 22:01:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780725307] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940404276] [2024-10-31 22:01:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:01:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:36,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:36,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:01:36,844 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:01:36,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:36,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:01:36,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:37,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:37,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940404276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:37,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-10-31 22:01:37,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606953167] [2024-10-31 22:01:37,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:37,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:01:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:01:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:01:37,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:01:37,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 966 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:37,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:37,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:01:37,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:38,256 INFO L124 PetriNetUnfolderBase]: 1021/1737 cut-off events. [2024-10-31 22:01:38,256 INFO L125 PetriNetUnfolderBase]: For 18636/18636 co-relation queries the response was YES. [2024-10-31 22:01:38,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 1737 events. 1021/1737 cut-off events. For 18636/18636 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8429 event pairs, 28 based on Foata normal form. 87/1824 useless extension candidates. Maximal degree in co-relation 8431. Up to 328 conditions per place. [2024-10-31 22:01:38,281 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 147 selfloop transitions, 158 changer transitions 3/309 dead transitions. [2024-10-31 22:01:38,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 309 transitions, 3418 flow [2024-10-31 22:01:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-31 22:01:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-31 22:01:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 249 transitions. [2024-10-31 22:01:38,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-10-31 22:01:38,284 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 966 flow. Second operand 28 states and 249 transitions. [2024-10-31 22:01:38,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 309 transitions, 3418 flow [2024-10-31 22:01:38,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 309 transitions, 3195 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-10-31 22:01:38,332 INFO L231 Difference]: Finished difference. Result has 135 places, 196 transitions, 2416 flow [2024-10-31 22:01:38,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2416, PETRI_PLACES=135, PETRI_TRANSITIONS=196} [2024-10-31 22:01:38,333 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 112 predicate places. [2024-10-31 22:01:38,333 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 196 transitions, 2416 flow [2024-10-31 22:01:38,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:38,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:38,334 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:38,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:01:38,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:01:38,539 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:38,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash -580098091, now seen corresponding path program 5 times [2024-10-31 22:01:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:38,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327216058] [2024-10-31 22:01:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327216058] [2024-10-31 22:01:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327216058] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:38,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729752264] [2024-10-31 22:01:38,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:01:38,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:38,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:38,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:01:38,817 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-31 22:01:38,817 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:38,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:01:38,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:38,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729752264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:39,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:39,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-31 22:01:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336963253] [2024-10-31 22:01:39,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:39,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:01:39,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:01:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:01:39,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:01:39,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 196 transitions, 2416 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:39,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:39,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:01:39,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:41,273 INFO L124 PetriNetUnfolderBase]: 1806/3067 cut-off events. [2024-10-31 22:01:41,274 INFO L125 PetriNetUnfolderBase]: For 64642/64642 co-relation queries the response was YES. [2024-10-31 22:01:41,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20851 conditions, 3067 events. 1806/3067 cut-off events. For 64642/64642 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16471 event pairs, 14 based on Foata normal form. 85/3152 useless extension candidates. Maximal degree in co-relation 17157. Up to 577 conditions per place. [2024-10-31 22:01:41,317 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 205 selfloop transitions, 342 changer transitions 2/550 dead transitions. [2024-10-31 22:01:41,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 550 transitions, 7648 flow [2024-10-31 22:01:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-31 22:01:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-10-31 22:01:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 409 transitions. [2024-10-31 22:01:41,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3974732750242954 [2024-10-31 22:01:41,320 INFO L175 Difference]: Start difference. First operand has 135 places, 196 transitions, 2416 flow. Second operand 49 states and 409 transitions. [2024-10-31 22:01:41,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 550 transitions, 7648 flow [2024-10-31 22:01:41,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 550 transitions, 7387 flow, removed 125 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:41,528 INFO L231 Difference]: Finished difference. Result has 211 places, 406 transitions, 6160 flow [2024-10-31 22:01:41,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=6160, PETRI_PLACES=211, PETRI_TRANSITIONS=406} [2024-10-31 22:01:41,529 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 188 predicate places. [2024-10-31 22:01:41,530 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 406 transitions, 6160 flow [2024-10-31 22:01:41,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:41,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:41,530 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:41,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:01:41,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:01:41,732 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:41,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash -406850399, now seen corresponding path program 6 times [2024-10-31 22:01:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:41,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664136998] [2024-10-31 22:01:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:41,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:41,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:41,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664136998] [2024-10-31 22:01:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664136998] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155278847] [2024-10-31 22:01:41,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:01:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:41,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:41,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:41,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:01:42,020 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-31 22:01:42,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:42,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:01:42,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:42,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155278847] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:42,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:42,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-10-31 22:01:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295365368] [2024-10-31 22:01:42,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:42,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:01:42,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:01:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:01:42,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:01:42,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 406 transitions, 6160 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:42,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:42,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:01:42,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:44,108 INFO L124 PetriNetUnfolderBase]: 2007/3338 cut-off events. [2024-10-31 22:01:44,108 INFO L125 PetriNetUnfolderBase]: For 128620/128620 co-relation queries the response was YES. [2024-10-31 22:01:44,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29992 conditions, 3338 events. 2007/3338 cut-off events. For 128620/128620 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17321 event pairs, 48 based on Foata normal form. 30/3368 useless extension candidates. Maximal degree in co-relation 29151. Up to 677 conditions per place. [2024-10-31 22:01:44,172 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 319 selfloop transitions, 252 changer transitions 2/574 dead transitions. [2024-10-31 22:01:44,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 574 transitions, 9989 flow [2024-10-31 22:01:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:01:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-31 22:01:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 180 transitions. [2024-10-31 22:01:44,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45112781954887216 [2024-10-31 22:01:44,174 INFO L175 Difference]: Start difference. First operand has 211 places, 406 transitions, 6160 flow. Second operand 19 states and 180 transitions. [2024-10-31 22:01:44,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 574 transitions, 9989 flow [2024-10-31 22:01:44,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 574 transitions, 9224 flow, removed 359 selfloop flow, removed 9 redundant places. [2024-10-31 22:01:44,915 INFO L231 Difference]: Finished difference. Result has 226 places, 461 transitions, 7143 flow [2024-10-31 22:01:44,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7143, PETRI_PLACES=226, PETRI_TRANSITIONS=461} [2024-10-31 22:01:44,920 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 203 predicate places. [2024-10-31 22:01:44,921 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 461 transitions, 7143 flow [2024-10-31 22:01:44,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:44,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:44,921 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:44,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:01:45,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:01:45,122 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:45,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1453803489, now seen corresponding path program 7 times [2024-10-31 22:01:45,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:45,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093735745] [2024-10-31 22:01:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:45,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:45,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093735745] [2024-10-31 22:01:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093735745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464431904] [2024-10-31 22:01:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:01:45,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:45,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:45,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:45,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:01:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:45,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:01:45,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:45,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:45,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464431904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:45,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:45,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-31 22:01:45,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855480771] [2024-10-31 22:01:45,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:45,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-31 22:01:45,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-31 22:01:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:01:45,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:01:45,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 461 transitions, 7143 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:45,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:45,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:01:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:48,112 INFO L124 PetriNetUnfolderBase]: 2390/3951 cut-off events. [2024-10-31 22:01:48,113 INFO L125 PetriNetUnfolderBase]: For 166486/166486 co-relation queries the response was YES. [2024-10-31 22:01:48,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36364 conditions, 3951 events. 2390/3951 cut-off events. For 166486/166486 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21264 event pairs, 58 based on Foata normal form. 16/3967 useless extension candidates. Maximal degree in co-relation 35856. Up to 748 conditions per place. [2024-10-31 22:01:48,192 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 324 selfloop transitions, 368 changer transitions 4/697 dead transitions. [2024-10-31 22:01:48,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 697 transitions, 12575 flow [2024-10-31 22:01:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-31 22:01:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-31 22:01:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 275 transitions. [2024-10-31 22:01:48,195 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3851540616246499 [2024-10-31 22:01:48,195 INFO L175 Difference]: Start difference. First operand has 226 places, 461 transitions, 7143 flow. Second operand 34 states and 275 transitions. [2024-10-31 22:01:48,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 697 transitions, 12575 flow [2024-10-31 22:01:48,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 697 transitions, 12022 flow, removed 170 selfloop flow, removed 10 redundant places. [2024-10-31 22:01:48,953 INFO L231 Difference]: Finished difference. Result has 260 places, 563 transitions, 9712 flow [2024-10-31 22:01:48,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9712, PETRI_PLACES=260, PETRI_TRANSITIONS=563} [2024-10-31 22:01:48,955 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 237 predicate places. [2024-10-31 22:01:48,955 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 563 transitions, 9712 flow [2024-10-31 22:01:48,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:48,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:48,955 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:48,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:01:49,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:49,156 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:49,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash 742700219, now seen corresponding path program 8 times [2024-10-31 22:01:49,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:49,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518679897] [2024-10-31 22:01:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:49,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:49,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518679897] [2024-10-31 22:01:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518679897] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:49,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265365126] [2024-10-31 22:01:49,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:01:49,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:49,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:49,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:49,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:01:49,372 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:01:49,372 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:49,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:01:49,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:49,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:49,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265365126] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:49,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:49,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-31 22:01:49,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179750615] [2024-10-31 22:01:49,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:49,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:01:49,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:01:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:01:49,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:01:49,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 563 transitions, 9712 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:49,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:49,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:01:49,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:52,573 INFO L124 PetriNetUnfolderBase]: 3029/5034 cut-off events. [2024-10-31 22:01:52,573 INFO L125 PetriNetUnfolderBase]: For 257994/257994 co-relation queries the response was YES. [2024-10-31 22:01:52,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48078 conditions, 5034 events. 3029/5034 cut-off events. For 257994/257994 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 28769 event pairs, 51 based on Foata normal form. 103/5137 useless extension candidates. Maximal degree in co-relation 45385. Up to 923 conditions per place. [2024-10-31 22:01:52,653 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 252 selfloop transitions, 656 changer transitions 2/911 dead transitions. [2024-10-31 22:01:52,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 911 transitions, 17319 flow [2024-10-31 22:01:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-31 22:01:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-31 22:01:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 379 transitions. [2024-10-31 22:01:52,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39233954451345754 [2024-10-31 22:01:52,657 INFO L175 Difference]: Start difference. First operand has 260 places, 563 transitions, 9712 flow. Second operand 46 states and 379 transitions. [2024-10-31 22:01:52,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 911 transitions, 17319 flow [2024-10-31 22:01:54,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 911 transitions, 16480 flow, removed 352 selfloop flow, removed 11 redundant places. [2024-10-31 22:01:54,241 INFO L231 Difference]: Finished difference. Result has 314 places, 776 transitions, 15366 flow [2024-10-31 22:01:54,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8980, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=15366, PETRI_PLACES=314, PETRI_TRANSITIONS=776} [2024-10-31 22:01:54,242 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 291 predicate places. [2024-10-31 22:01:54,242 INFO L471 AbstractCegarLoop]: Abstraction has has 314 places, 776 transitions, 15366 flow [2024-10-31 22:01:54,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:54,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:54,243 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:54,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:01:54,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:01:54,444 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:01:54,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash 915947911, now seen corresponding path program 9 times [2024-10-31 22:01:54,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:54,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775698508] [2024-10-31 22:01:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:54,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:54,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:54,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775698508] [2024-10-31 22:01:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775698508] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159941450] [2024-10-31 22:01:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:01:54,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:54,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:54,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:54,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8205873-5d2f-4a1a-85df-2c6ba4b6db09/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:01:54,666 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-31 22:01:54,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:54,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:01:54,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:54,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159941450] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:54,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:54,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-31 22:01:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44984847] [2024-10-31 22:01:54,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:54,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:01:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:01:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:01:54,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:01:54,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 776 transitions, 15366 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:54,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:54,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:01:54,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:58,331 INFO L124 PetriNetUnfolderBase]: 3028/5047 cut-off events. [2024-10-31 22:01:58,331 INFO L125 PetriNetUnfolderBase]: For 254439/254439 co-relation queries the response was YES.