./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya --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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:11:17,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:11:17,303 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:11:17,308 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:11:17,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:11:17,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:11:17,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:11:17,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:11:17,334 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:11:17,335 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:11:17,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:11:17,336 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:11:17,336 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:11:17,337 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:11:17,337 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:11:17,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:11:17,338 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:11:17,339 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:11:17,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:11:17,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:11:17,340 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:11:17,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:11:17,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:11:17,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:11:17,343 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:11:17,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:11:17,344 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:11:17,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:11:17,344 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:11:17,345 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:11:17,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:11:17,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:11:17,346 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:11:17,346 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:11:17,346 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:11:17,346 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:11:17,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:11:17,347 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:11:17,347 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:11:17,347 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:11:17,347 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:11:17,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:11:17,348 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_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2023-11-29 00:11:17,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:11:17,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:11:17,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:11:17,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:11:17,579 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:11:17,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-29 00:11:20,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:11:20,718 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:11:20,718 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-29 00:11:20,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/data/af5411549/182c67c774cd45fab7ba2c6cbbb0d7a8/FLAGe1785ab44 [2023-11-29 00:11:20,750 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/data/af5411549/182c67c774cd45fab7ba2c6cbbb0d7a8 [2023-11-29 00:11:20,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:11:20,753 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:11:20,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:11:20,755 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:11:20,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:11:20,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:11:20" (1/1) ... [2023-11-29 00:11:20,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8c9400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:20, skipping insertion in model container [2023-11-29 00:11:20,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:11:20" (1/1) ... [2023-11-29 00:11:20,810 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:11:21,191 WARN L240 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_95bf6c14-3140-48bb-a5b3-882c8fa60735/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2023-11-29 00:11:21,197 WARN L240 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_95bf6c14-3140-48bb-a5b3-882c8fa60735/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2023-11-29 00:11:21,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:11:21,212 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:11:21,259 WARN L240 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_95bf6c14-3140-48bb-a5b3-882c8fa60735/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2023-11-29 00:11:21,262 WARN L240 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_95bf6c14-3140-48bb-a5b3-882c8fa60735/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2023-11-29 00:11:21,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:11:21,325 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:11:21,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21 WrapperNode [2023-11-29 00:11:21,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:11:21,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:11:21,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:11:21,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:11:21,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,385 INFO L138 Inliner]: procedures = 275, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-11-29 00:11:21,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:11:21,386 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:11:21,386 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:11:21,386 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:11:21,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,403 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,423 INFO L175 MemorySlicer]: Split 38 memory accesses to 6 slices as follows [2, 24, 5, 3, 2, 2]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0, 0]. The 15 writes are split as follows [0, 11, 0, 2, 1, 1]. [2023-11-29 00:11:21,423 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,423 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,441 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,444 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:11:21,452 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:11:21,453 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:11:21,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:11:21,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (1/1) ... [2023-11-29 00:11:21,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:11:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:21,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:11:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:11:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 00:11:21,517 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 00:11:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 00:11:21,517 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 00:11:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:11:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:11:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 00:11:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:11:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:11:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:11:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:11:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:11:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 00:11:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:11:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:11:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:11:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:11:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:11:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 00:11:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 00:11:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:11:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:11:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:11:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:11:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:11:21,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:11:21,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 00:11:21,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:11:21,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:11:21,524 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:11:21,690 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:11:21,692 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:11:21,975 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:11:22,275 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:11:22,275 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:11:22,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:11:22 BoogieIcfgContainer [2023-11-29 00:11:22,276 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:11:22,278 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:11:22,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:11:22,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:11:22,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:11:20" (1/3) ... [2023-11-29 00:11:22,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f58c554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:11:22, skipping insertion in model container [2023-11-29 00:11:22,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:11:21" (2/3) ... [2023-11-29 00:11:22,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f58c554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:11:22, skipping insertion in model container [2023-11-29 00:11:22,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:11:22" (3/3) ... [2023-11-29 00:11:22,284 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2023-11-29 00:11:22,293 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:11:22,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:11:22,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-29 00:11:22,304 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:11:22,364 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:11:22,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 41 transitions, 96 flow [2023-11-29 00:11:22,429 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2023-11-29 00:11:22,430 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:11:22,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 7/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2023-11-29 00:11:22,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 41 transitions, 96 flow [2023-11-29 00:11:22,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 37 transitions, 83 flow [2023-11-29 00:11:22,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:11:22,455 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@2b886fe4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:11:22,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 00:11:22,459 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:11:22,459 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 00:11:22,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:11:22,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:22,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:11:22,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:22,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 545855, now seen corresponding path program 1 times [2023-11-29 00:11:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:22,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51255884] [2023-11-29 00:11:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:22,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:22,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51255884] [2023-11-29 00:11:22,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51255884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:22,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:22,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:11:22,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859904322] [2023-11-29 00:11:22,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:22,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:11:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:11:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:11:22,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:22,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 83 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:22,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:22,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:22,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:22,897 INFO L124 PetriNetUnfolderBase]: 303/522 cut-off events. [2023-11-29 00:11:22,898 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-29 00:11:22,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 522 events. 303/522 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2051 event pairs, 209 based on Foata normal form. 16/458 useless extension candidates. Maximal degree in co-relation 914. Up to 485 conditions per place. [2023-11-29 00:11:22,905 INFO L140 encePairwiseOnDemand]: 39/41 looper letters, 26 selfloop transitions, 0 changer transitions 2/33 dead transitions. [2023-11-29 00:11:22,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 131 flow [2023-11-29 00:11:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:11:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 00:11:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2023-11-29 00:11:22,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2023-11-29 00:11:22,919 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 46 transitions. [2023-11-29 00:11:22,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 46 transitions. [2023-11-29 00:11:22,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:22,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 46 transitions. [2023-11-29 00:11:22,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:22,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:22,928 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:22,930 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 83 flow. Second operand 2 states and 46 transitions. [2023-11-29 00:11:22,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 131 flow [2023-11-29 00:11:22,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:11:22,936 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 66 flow [2023-11-29 00:11:22,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-29 00:11:22,942 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-11-29 00:11:22,943 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 66 flow [2023-11-29 00:11:22,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:22,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:22,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:22,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:11:22,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:22,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash -684618514, now seen corresponding path program 1 times [2023-11-29 00:11:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:22,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279122817] [2023-11-29 00:11:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279122817] [2023-11-29 00:11:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279122817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:23,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:23,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:11:23,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882270406] [2023-11-29 00:11:23,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:23,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:11:23,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:23,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:23,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:23,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:23,295 INFO L124 PetriNetUnfolderBase]: 159/324 cut-off events. [2023-11-29 00:11:23,295 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 00:11:23,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 324 events. 159/324 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1158 event pairs, 83 based on Foata normal form. 14/302 useless extension candidates. Maximal degree in co-relation 635. Up to 163 conditions per place. [2023-11-29 00:11:23,299 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 28 selfloop transitions, 2 changer transitions 5/40 dead transitions. [2023-11-29 00:11:23,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 157 flow [2023-11-29 00:11:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-29 00:11:23,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2023-11-29 00:11:23,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-29 00:11:23,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-29 00:11:23,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:23,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-29 00:11:23,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,305 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 66 flow. Second operand 3 states and 60 transitions. [2023-11-29 00:11:23,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 157 flow [2023-11-29 00:11:23,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 157 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:11:23,307 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 72 flow [2023-11-29 00:11:23,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-29 00:11:23,308 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-29 00:11:23,308 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 72 flow [2023-11-29 00:11:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:23,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:23,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:11:23,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:23,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1126795683, now seen corresponding path program 1 times [2023-11-29 00:11:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:23,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502986923] [2023-11-29 00:11:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:23,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:23,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:23,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502986923] [2023-11-29 00:11:23,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502986923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:23,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:11:23,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:11:23,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200074212] [2023-11-29 00:11:23,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:23,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:11:23,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:23,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2023-11-29 00:11:23,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:23,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:23,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:23,521 INFO L124 PetriNetUnfolderBase]: 160/327 cut-off events. [2023-11-29 00:11:23,521 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 00:11:23,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 327 events. 160/327 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1159 event pairs, 127 based on Foata normal form. 8/315 useless extension candidates. Maximal degree in co-relation 668. Up to 279 conditions per place. [2023-11-29 00:11:23,525 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 29 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-29 00:11:23,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 148 flow [2023-11-29 00:11:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-29 00:11:23,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2023-11-29 00:11:23,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-29 00:11:23,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-29 00:11:23,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:23,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-29 00:11:23,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,529 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 56 transitions. [2023-11-29 00:11:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 148 flow [2023-11-29 00:11:23,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:11:23,531 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 80 flow [2023-11-29 00:11:23,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-29 00:11:23,532 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-11-29 00:11:23,532 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 80 flow [2023-11-29 00:11:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 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) [2023-11-29 00:11:23,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:23,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:23,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:11:23,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:23,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:23,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1293593400, now seen corresponding path program 1 times [2023-11-29 00:11:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:23,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304702056] [2023-11-29 00:11:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:23,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:23,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304702056] [2023-11-29 00:11:23,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304702056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:23,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131402448] [2023-11-29 00:11:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:23,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:23,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:23,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:23,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:11:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:23,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:11:23,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:23,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:11:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:23,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:11:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131402448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:11:23,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:11:23,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-29 00:11:23,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665817931] [2023-11-29 00:11:23,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:11:23,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:11:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:11:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:11:23,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:23,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:23,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:23,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:23,956 INFO L124 PetriNetUnfolderBase]: 123/290 cut-off events. [2023-11-29 00:11:23,956 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-29 00:11:23,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 290 events. 123/290 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1064 event pairs, 35 based on Foata normal form. 10/282 useless extension candidates. Maximal degree in co-relation 593. Up to 158 conditions per place. [2023-11-29 00:11:23,958 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 30 selfloop transitions, 3 changer transitions 1/39 dead transitions. [2023-11-29 00:11:23,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 167 flow [2023-11-29 00:11:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:11:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:11:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2023-11-29 00:11:23,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2023-11-29 00:11:23,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 59 transitions. [2023-11-29 00:11:23,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 59 transitions. [2023-11-29 00:11:23,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:23,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 59 transitions. [2023-11-29 00:11:23,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,963 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 80 flow. Second operand 3 states and 59 transitions. [2023-11-29 00:11:23,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 167 flow [2023-11-29 00:11:23,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 163 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:23,966 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 82 flow [2023-11-29 00:11:23,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-29 00:11:23,967 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-29 00:11:23,967 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 82 flow [2023-11-29 00:11:23,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:23,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:23,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:23,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:11:24,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:24,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:24,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:24,173 INFO L85 PathProgramCache]: Analyzing trace with hash 648405293, now seen corresponding path program 1 times [2023-11-29 00:11:24,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:24,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78869194] [2023-11-29 00:11:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78869194] [2023-11-29 00:11:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78869194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55101930] [2023-11-29 00:11:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:24,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:24,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:11:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:24,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:11:24,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:24,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:24,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55101930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:24,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:24,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 00:11:24,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724311736] [2023-11-29 00:11:24,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:24,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:11:24,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:11:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:11:24,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:24,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:24,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:24,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:24,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:24,625 INFO L124 PetriNetUnfolderBase]: 141/302 cut-off events. [2023-11-29 00:11:24,625 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-29 00:11:24,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 302 events. 141/302 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 974 event pairs, 99 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 687. Up to 229 conditions per place. [2023-11-29 00:11:24,628 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 40 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-29 00:11:24,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 224 flow [2023-11-29 00:11:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:11:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:11:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2023-11-29 00:11:24,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2023-11-29 00:11:24,630 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 96 transitions. [2023-11-29 00:11:24,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 96 transitions. [2023-11-29 00:11:24,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:24,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 96 transitions. [2023-11-29 00:11:24,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:24,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:24,633 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:24,633 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 82 flow. Second operand 6 states and 96 transitions. [2023-11-29 00:11:24,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 224 flow [2023-11-29 00:11:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:24,635 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 115 flow [2023-11-29 00:11:24,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-29 00:11:24,636 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-11-29 00:11:24,636 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 115 flow [2023-11-29 00:11:24,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:24,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:24,637 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:24,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:11:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:24,840 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:24,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash 760911586, now seen corresponding path program 2 times [2023-11-29 00:11:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090188742] [2023-11-29 00:11:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090188742] [2023-11-29 00:11:25,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090188742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152936215] [2023-11-29 00:11:25,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:11:25,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:25,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:25,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:11:25,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:11:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:25,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:11:25,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:25,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:25,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152936215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:25,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:25,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 00:11:25,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285345893] [2023-11-29 00:11:25,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:25,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:11:25,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:25,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:11:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:11:25,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:25,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 115 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:25,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:25,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:25,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:25,588 INFO L124 PetriNetUnfolderBase]: 177/374 cut-off events. [2023-11-29 00:11:25,588 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-11-29 00:11:25,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 374 events. 177/374 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1174 event pairs, 99 based on Foata normal form. 36/394 useless extension candidates. Maximal degree in co-relation 965. Up to 229 conditions per place. [2023-11-29 00:11:25,591 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 64 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-11-29 00:11:25,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 401 flow [2023-11-29 00:11:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:11:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 00:11:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 177 transitions. [2023-11-29 00:11:25,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2023-11-29 00:11:25,593 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 177 transitions. [2023-11-29 00:11:25,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 177 transitions. [2023-11-29 00:11:25,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:25,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 177 transitions. [2023-11-29 00:11:25,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.75) internal successors, (177), 12 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:25,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 41.0) internal successors, (533), 13 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:25,597 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 41.0) internal successors, (533), 13 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:25,597 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 115 flow. Second operand 12 states and 177 transitions. [2023-11-29 00:11:25,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 401 flow [2023-11-29 00:11:25,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 387 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 00:11:25,602 INFO L231 Difference]: Finished difference. Result has 59 places, 40 transitions, 185 flow [2023-11-29 00:11:25,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=185, PETRI_PLACES=59, PETRI_TRANSITIONS=40} [2023-11-29 00:11:25,603 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 22 predicate places. [2023-11-29 00:11:25,603 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 40 transitions, 185 flow [2023-11-29 00:11:25,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:25,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:25,603 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:25,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:11:25,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:25,808 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:25,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash 843277058, now seen corresponding path program 3 times [2023-11-29 00:11:25,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:25,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847144680] [2023-11-29 00:11:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:25,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:26,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:26,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847144680] [2023-11-29 00:11:26,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847144680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:26,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828994279] [2023-11-29 00:11:26,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:11:26,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:26,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:26,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:26,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:11:30,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 00:11:30,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:30,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:11:30,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:30,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:30,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828994279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:30,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:30,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-29 00:11:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120839090] [2023-11-29 00:11:30,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:30,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:11:30,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:11:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:11:30,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:30,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 40 transitions, 185 flow. Second operand has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:30,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:30,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:30,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:30,852 INFO L124 PetriNetUnfolderBase]: 249/518 cut-off events. [2023-11-29 00:11:30,853 INFO L125 PetriNetUnfolderBase]: For 2937/2937 co-relation queries the response was YES. [2023-11-29 00:11:30,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 518 events. 249/518 cut-off events. For 2937/2937 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1575 event pairs, 99 based on Foata normal form. 72/574 useless extension candidates. Maximal degree in co-relation 1595. Up to 229 conditions per place. [2023-11-29 00:11:30,858 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 112 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2023-11-29 00:11:30,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 771 flow [2023-11-29 00:11:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:11:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 00:11:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 339 transitions. [2023-11-29 00:11:30,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2023-11-29 00:11:30,861 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 339 transitions. [2023-11-29 00:11:30,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 339 transitions. [2023-11-29 00:11:30,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:30,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 339 transitions. [2023-11-29 00:11:30,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 14.125) internal successors, (339), 24 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:30,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 41.0) internal successors, (1025), 25 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:30,867 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 41.0) internal successors, (1025), 25 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:30,867 INFO L175 Difference]: Start difference. First operand has 59 places, 40 transitions, 185 flow. Second operand 24 states and 339 transitions. [2023-11-29 00:11:30,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 771 flow [2023-11-29 00:11:30,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 140 transitions, 699 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-29 00:11:30,877 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 305 flow [2023-11-29 00:11:30,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=305, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2023-11-29 00:11:30,878 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2023-11-29 00:11:30,878 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 305 flow [2023-11-29 00:11:30,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:30,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:30,878 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:30,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:11:31,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:31,079 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:31,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash 530723650, now seen corresponding path program 4 times [2023-11-29 00:11:31,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:31,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978384520] [2023-11-29 00:11:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:31,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:31,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978384520] [2023-11-29 00:11:31,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978384520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:31,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116740523] [2023-11-29 00:11:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:11:31,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:31,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:31,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:11:32,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:11:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:32,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:11:32,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:32,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:32,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116740523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:32,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:32,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-29 00:11:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944947731] [2023-11-29 00:11:32,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:32,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 00:11:32,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 00:11:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 00:11:32,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2023-11-29 00:11:32,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 305 flow. Second operand has 49 states, 49 states have (on average 9.36734693877551) internal successors, (459), 49 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:32,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:11:32,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2023-11-29 00:11:33,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:33,888 INFO L124 PetriNetUnfolderBase]: 393/806 cut-off events. [2023-11-29 00:11:33,889 INFO L125 PetriNetUnfolderBase]: For 31653/31653 co-relation queries the response was YES. [2023-11-29 00:11:33,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2752 conditions, 806 events. 393/806 cut-off events. For 31653/31653 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2362 event pairs, 99 based on Foata normal form. 144/934 useless extension candidates. Maximal degree in co-relation 2723. Up to 235 conditions per place. [2023-11-29 00:11:33,895 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 208 selfloop transitions, 47 changer transitions 0/260 dead transitions. [2023-11-29 00:11:33,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 260 transitions, 1467 flow [2023-11-29 00:11:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 00:11:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 00:11:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 663 transitions. [2023-11-29 00:11:33,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33689024390243905 [2023-11-29 00:11:33,900 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 663 transitions. [2023-11-29 00:11:33,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 663 transitions. [2023-11-29 00:11:33,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:33,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 663 transitions. [2023-11-29 00:11:33,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 13.8125) internal successors, (663), 48 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:33,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 41.0) internal successors, (2009), 49 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:33,907 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 41.0) internal successors, (2009), 49 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:33,907 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 305 flow. Second operand 48 states and 663 transitions. [2023-11-29 00:11:33,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 260 transitions, 1467 flow [2023-11-29 00:11:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 260 transitions, 1323 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-11-29 00:11:33,924 INFO L231 Difference]: Finished difference. Result has 149 places, 76 transitions, 545 flow [2023-11-29 00:11:33,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=545, PETRI_PLACES=149, PETRI_TRANSITIONS=76} [2023-11-29 00:11:33,925 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 112 predicate places. [2023-11-29 00:11:33,925 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 76 transitions, 545 flow [2023-11-29 00:11:33,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.36734693877551) internal successors, (459), 49 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:11:33,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:11:33,926 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:33,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:11:34,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:34,127 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 00:11:34,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:34,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2079542334, now seen corresponding path program 5 times [2023-11-29 00:11:34,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:34,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900241941] [2023-11-29 00:11:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:34,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:36,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900241941] [2023-11-29 00:11:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900241941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361025968] [2023-11-29 00:11:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:11:36,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:36,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:36,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:36,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bf6c14-3140-48bb-a5b3-882c8fa60735/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process