./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:13:13,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:13:13,112 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:13:13,117 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:13:13,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:13:13,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:13:13,148 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:13:13,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:13:13,149 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:13:13,149 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:13:13,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:13:13,150 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:13:13,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:13:13,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:13:13,152 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:13:13,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:13:13,155 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:13:13,158 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:13:13,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:13:13,159 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:13:13,159 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:13:13,161 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:13:13,161 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:13:13,161 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:13:13,162 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:13:13,162 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:13:13,162 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:13:13,162 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:13:13,163 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:13:13,163 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:13:13,163 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:13:13,164 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:13:13,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:13,164 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:13:13,166 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:13:13,167 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:13:13,167 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:13:13,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:13:13,168 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:13:13,168 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:13:13,168 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:13:13,169 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:13:13,169 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_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2024-10-31 22:13:13,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:13:13,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:13:13,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:13:13,513 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:13:13,514 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:13:13,515 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c Unable to find full path for "g++" [2024-10-31 22:13:15,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:13:15,714 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:13:15,715 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2024-10-31 22:13:15,731 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/data/3e54f2dcf/3c065ffba61a47b994e33a3e634cd383/FLAG74c9d2648 [2024-10-31 22:13:16,041 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/data/3e54f2dcf/3c065ffba61a47b994e33a3e634cd383 [2024-10-31 22:13:16,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:13:16,046 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:13:16,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:16,047 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:13:16,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:13:16,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb2d6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16, skipping insertion in model container [2024-10-31 22:13:16,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,087 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:13:16,287 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2024-10-31 22:13:16,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:16,298 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:13:16,317 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2024-10-31 22:13:16,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:16,336 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:13:16,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16 WrapperNode [2024-10-31 22:13:16,337 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:16,338 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:16,338 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:13:16,338 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:13:16,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,373 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-10-31 22:13:16,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:16,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:13:16,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:13:16,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:13:16,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,387 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,398 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:13:16,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,406 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,407 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,408 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,410 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:13:16,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:13:16,411 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:13:16,411 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:13:16,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (1/1) ... [2024-10-31 22:13:16,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:16,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:16,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:13:16,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:13:16,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:13:16,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:13:16,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:13:16,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:13:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:13:16,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:13:16,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:13:16,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:13:16,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:13:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:13:16,489 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:13:16,606 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:13:16,608 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:13:16,875 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:13:16,876 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:13:17,036 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:13:17,036 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:13:17,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:17 BoogieIcfgContainer [2024-10-31 22:13:17,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:13:17,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:13:17,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:13:17,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:13:17,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:13:16" (1/3) ... [2024-10-31 22:13:17,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f894c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:17, skipping insertion in model container [2024-10-31 22:13:17,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:16" (2/3) ... [2024-10-31 22:13:17,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f894c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:17, skipping insertion in model container [2024-10-31 22:13:17,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:17" (3/3) ... [2024-10-31 22:13:17,047 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2024-10-31 22:13:17,066 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:13:17,067 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:13:17,067 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:13:17,110 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:13:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-10-31 22:13:17,198 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-10-31 22:13:17,198 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:13:17,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-31 22:13:17,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-10-31 22:13:17,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-10-31 22:13:17,239 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:13:17,250 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d7ec2ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:13:17,251 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:13:17,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:13:17,269 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-10-31 22:13:17,269 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:13:17,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:17,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:17,271 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:17,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 570217615, now seen corresponding path program 1 times [2024-10-31 22:13:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:17,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324919101] [2024-10-31 22:13:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:17,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:18,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324919101] [2024-10-31 22:13:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324919101] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:18,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:18,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:13:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131699961] [2024-10-31 22:13:18,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:18,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:18,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:18,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:18,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-31 22:13:18,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:18,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:18,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-31 22:13:18,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:18,378 INFO L124 PetriNetUnfolderBase]: 78/172 cut-off events. [2024-10-31 22:13:18,378 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-10-31 22:13:18,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 172 events. 78/172 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 600 event pairs, 21 based on Foata normal form. 8/179 useless extension candidates. Maximal degree in co-relation 289. Up to 93 conditions per place. [2024-10-31 22:13:18,382 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 30 selfloop transitions, 8 changer transitions 4/45 dead transitions. [2024-10-31 22:13:18,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 207 flow [2024-10-31 22:13:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:13:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:13:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-10-31 22:13:18,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-10-31 22:13:18,398 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 7 states and 79 transitions. [2024-10-31 22:13:18,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 207 flow [2024-10-31 22:13:18,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:13:18,405 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 97 flow [2024-10-31 22:13:18,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-10-31 22:13:18,411 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2024-10-31 22:13:18,411 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 97 flow [2024-10-31 22:13:18,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:18,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:18,412 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:18,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:13:18,413 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:18,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1057667961, now seen corresponding path program 2 times [2024-10-31 22:13:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:18,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232719986] [2024-10-31 22:13:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:18,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232719986] [2024-10-31 22:13:18,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232719986] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:18,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:18,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:13:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818983032] [2024-10-31 22:13:18,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:18,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:18,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-31 22:13:18,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:18,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:18,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-31 22:13:18,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:19,087 INFO L124 PetriNetUnfolderBase]: 78/178 cut-off events. [2024-10-31 22:13:19,088 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-10-31 22:13:19,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 178 events. 78/178 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 672 event pairs, 17 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 446. Up to 93 conditions per place. [2024-10-31 22:13:19,090 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 8 changer transitions 9/49 dead transitions. [2024-10-31 22:13:19,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 267 flow [2024-10-31 22:13:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:13:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:13:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-10-31 22:13:19,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-10-31 22:13:19,093 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 97 flow. Second operand 7 states and 78 transitions. [2024-10-31 22:13:19,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 267 flow [2024-10-31 22:13:19,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 263 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:19,096 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 131 flow [2024-10-31 22:13:19,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2024-10-31 22:13:19,097 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 15 predicate places. [2024-10-31 22:13:19,098 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 131 flow [2024-10-31 22:13:19,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:19,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:19,098 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:19,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:13:19,099 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:19,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash -62739223, now seen corresponding path program 3 times [2024-10-31 22:13:19,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:19,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12965576] [2024-10-31 22:13:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:19,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12965576] [2024-10-31 22:13:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12965576] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:19,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:19,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:13:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946643757] [2024-10-31 22:13:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:19,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:19,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-31 22:13:19,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:19,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:19,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-31 22:13:19,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:19,608 INFO L124 PetriNetUnfolderBase]: 81/178 cut-off events. [2024-10-31 22:13:19,608 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-10-31 22:13:19,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 178 events. 81/178 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 635 event pairs, 25 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 538. Up to 97 conditions per place. [2024-10-31 22:13:19,613 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 12 changer transitions 4/47 dead transitions. [2024-10-31 22:13:19,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 308 flow [2024-10-31 22:13:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:13:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:13:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-31 22:13:19,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:13:19,617 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 131 flow. Second operand 7 states and 77 transitions. [2024-10-31 22:13:19,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 308 flow [2024-10-31 22:13:19,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 287 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-31 22:13:19,630 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 194 flow [2024-10-31 22:13:19,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-10-31 22:13:19,632 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 19 predicate places. [2024-10-31 22:13:19,633 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 194 flow [2024-10-31 22:13:19,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:19,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:19,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:19,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:13:19,634 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:19,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash -917885125, now seen corresponding path program 4 times [2024-10-31 22:13:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121807004] [2024-10-31 22:13:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:19,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:19,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:19,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121807004] [2024-10-31 22:13:19,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121807004] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:19,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:19,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:13:19,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114164143] [2024-10-31 22:13:19,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:19,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:19,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:19,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-31 22:13:19,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:19,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:19,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-31 22:13:19,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:20,123 INFO L124 PetriNetUnfolderBase]: 79/178 cut-off events. [2024-10-31 22:13:20,124 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2024-10-31 22:13:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 178 events. 79/178 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 656 event pairs, 23 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 567. Up to 97 conditions per place. [2024-10-31 22:13:20,126 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 14 changer transitions 5/50 dead transitions. [2024-10-31 22:13:20,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 368 flow [2024-10-31 22:13:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:13:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:13:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-31 22:13:20,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:13:20,129 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 194 flow. Second operand 7 states and 77 transitions. [2024-10-31 22:13:20,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 368 flow [2024-10-31 22:13:20,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 346 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-31 22:13:20,136 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 241 flow [2024-10-31 22:13:20,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2024-10-31 22:13:20,138 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 24 predicate places. [2024-10-31 22:13:20,138 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 241 flow [2024-10-31 22:13:20,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:20,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:20,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:13:20,139 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:20,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash -910085405, now seen corresponding path program 5 times [2024-10-31 22:13:20,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:20,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585146946] [2024-10-31 22:13:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:20,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585146946] [2024-10-31 22:13:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585146946] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:20,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:13:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161425024] [2024-10-31 22:13:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:20,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:20,480 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-31 22:13:20,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:20,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-31 22:13:20,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:20,652 INFO L124 PetriNetUnfolderBase]: 76/174 cut-off events. [2024-10-31 22:13:20,652 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2024-10-31 22:13:20,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 174 events. 76/174 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 636 event pairs, 20 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 578. Up to 97 conditions per place. [2024-10-31 22:13:20,655 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 27 selfloop transitions, 13 changer transitions 7/50 dead transitions. [2024-10-31 22:13:20,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 384 flow [2024-10-31 22:13:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:13:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:13:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-10-31 22:13:20,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:13:20,660 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 241 flow. Second operand 7 states and 77 transitions. [2024-10-31 22:13:20,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 384 flow [2024-10-31 22:13:20,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 327 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-10-31 22:13:20,666 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 211 flow [2024-10-31 22:13:20,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2024-10-31 22:13:20,668 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-10-31 22:13:20,669 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 211 flow [2024-10-31 22:13:20,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:20,670 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:20,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:13:20,670 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:20,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash -201267373, now seen corresponding path program 6 times [2024-10-31 22:13:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096952440] [2024-10-31 22:13:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:20,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:20,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096952440] [2024-10-31 22:13:20,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096952440] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:20,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:13:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768506923] [2024-10-31 22:13:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:20,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:13:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:13:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:13:20,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-10-31 22:13:20,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:20,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-10-31 22:13:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:21,090 INFO L124 PetriNetUnfolderBase]: 73/159 cut-off events. [2024-10-31 22:13:21,091 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2024-10-31 22:13:21,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 159 events. 73/159 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 544 event pairs, 22 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 513. Up to 97 conditions per place. [2024-10-31 22:13:21,093 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 21 selfloop transitions, 13 changer transitions 7/44 dead transitions. [2024-10-31 22:13:21,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 328 flow [2024-10-31 22:13:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:13:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:13:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-10-31 22:13:21,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-10-31 22:13:21,098 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 211 flow. Second operand 7 states and 71 transitions. [2024-10-31 22:13:21,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 328 flow [2024-10-31 22:13:21,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 296 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-31 22:13:21,101 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 200 flow [2024-10-31 22:13:21,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2024-10-31 22:13:21,107 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2024-10-31 22:13:21,107 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 200 flow [2024-10-31 22:13:21,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:21,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:21,108 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:21,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:13:21,109 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:21,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1917961257, now seen corresponding path program 1 times [2024-10-31 22:13:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:21,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404627420] [2024-10-31 22:13:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:21,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:21,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:21,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404627420] [2024-10-31 22:13:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404627420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538275258] [2024-10-31 22:13:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:21,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:21,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:13:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:21,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:21,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:21,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538275258] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:22,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:22,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 22:13:22,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104169829] [2024-10-31 22:13:22,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:22,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:13:22,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:13:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:13:22,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:22,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 200 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:22,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:22,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:22,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:23,961 INFO L124 PetriNetUnfolderBase]: 363/692 cut-off events. [2024-10-31 22:13:23,961 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2024-10-31 22:13:23,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 692 events. 363/692 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3104 event pairs, 14 based on Foata normal form. 17/709 useless extension candidates. Maximal degree in co-relation 1801. Up to 146 conditions per place. [2024-10-31 22:13:23,967 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 129 selfloop transitions, 78 changer transitions 16/224 dead transitions. [2024-10-31 22:13:23,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 224 transitions, 1241 flow [2024-10-31 22:13:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-31 22:13:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-10-31 22:13:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 338 transitions. [2024-10-31 22:13:23,971 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-10-31 22:13:23,971 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 200 flow. Second operand 40 states and 338 transitions. [2024-10-31 22:13:23,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 224 transitions, 1241 flow [2024-10-31 22:13:23,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 224 transitions, 1189 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-31 22:13:23,984 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 613 flow [2024-10-31 22:13:23,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=613, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-10-31 22:13:23,986 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 59 predicate places. [2024-10-31 22:13:23,989 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 613 flow [2024-10-31 22:13:23,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:23,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:23,990 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:24,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:13:24,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:24,195 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:24,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1087897233, now seen corresponding path program 2 times [2024-10-31 22:13:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:24,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635872245] [2024-10-31 22:13:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:24,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635872245] [2024-10-31 22:13:24,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635872245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804114857] [2024-10-31 22:13:24,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:13:24,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:24,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:24,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:24,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:13:24,550 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:13:24,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:24,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:24,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:24,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804114857] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:25,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:25,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 22:13:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432579756] [2024-10-31 22:13:25,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:25,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:13:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:13:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:13:25,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:25,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 613 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:25,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:25,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:25,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:26,632 INFO L124 PetriNetUnfolderBase]: 465/885 cut-off events. [2024-10-31 22:13:26,633 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-10-31 22:13:26,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3022 conditions, 885 events. 465/885 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4326 event pairs, 26 based on Foata normal form. 2/887 useless extension candidates. Maximal degree in co-relation 2962. Up to 393 conditions per place. [2024-10-31 22:13:26,640 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 115 selfloop transitions, 119 changer transitions 9/244 dead transitions. [2024-10-31 22:13:26,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 244 transitions, 1718 flow [2024-10-31 22:13:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-31 22:13:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-31 22:13:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 283 transitions. [2024-10-31 22:13:26,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36753246753246754 [2024-10-31 22:13:26,642 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 613 flow. Second operand 35 states and 283 transitions. [2024-10-31 22:13:26,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 244 transitions, 1718 flow [2024-10-31 22:13:26,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 244 transitions, 1575 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-10-31 22:13:26,659 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1170 flow [2024-10-31 22:13:26,660 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1170, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-10-31 22:13:26,662 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 95 predicate places. [2024-10-31 22:13:26,664 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1170 flow [2024-10-31 22:13:26,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:26,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:26,665 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:26,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:13:26,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:26,869 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:26,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1950934285, now seen corresponding path program 3 times [2024-10-31 22:13:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527081454] [2024-10-31 22:13:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:27,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:27,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527081454] [2024-10-31 22:13:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527081454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:27,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450625258] [2024-10-31 22:13:27,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:13:27,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:27,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:27,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:27,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:13:27,255 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:13:27,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:27,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:27,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:27,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:27,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450625258] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:27,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:27,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 22:13:27,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567872234] [2024-10-31 22:13:27,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:27,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:13:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:13:27,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:13:27,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:27,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1170 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:27,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:27,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:27,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:30,447 INFO L124 PetriNetUnfolderBase]: 728/1389 cut-off events. [2024-10-31 22:13:30,447 INFO L125 PetriNetUnfolderBase]: For 2882/2882 co-relation queries the response was YES. [2024-10-31 22:13:30,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1389 events. 728/1389 cut-off events. For 2882/2882 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7646 event pairs, 22 based on Foata normal form. 2/1389 useless extension candidates. Maximal degree in co-relation 5513. Up to 254 conditions per place. [2024-10-31 22:13:30,476 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 183 selfloop transitions, 242 changer transitions 11/437 dead transitions. [2024-10-31 22:13:30,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 437 transitions, 3579 flow [2024-10-31 22:13:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-31 22:13:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-31 22:13:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 509 transitions. [2024-10-31 22:13:30,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3615056818181818 [2024-10-31 22:13:30,480 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1170 flow. Second operand 64 states and 509 transitions. [2024-10-31 22:13:30,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 437 transitions, 3579 flow [2024-10-31 22:13:30,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 437 transitions, 3502 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-10-31 22:13:30,512 INFO L231 Difference]: Finished difference. Result has 191 places, 280 transitions, 2690 flow [2024-10-31 22:13:30,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2690, PETRI_PLACES=191, PETRI_TRANSITIONS=280} [2024-10-31 22:13:30,513 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 167 predicate places. [2024-10-31 22:13:30,514 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 280 transitions, 2690 flow [2024-10-31 22:13:30,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:30,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:30,514 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:30,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:13:30,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:30,719 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:30,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1818662245, now seen corresponding path program 4 times [2024-10-31 22:13:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:30,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838652616] [2024-10-31 22:13:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:30,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:30,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:30,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838652616] [2024-10-31 22:13:30,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838652616] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:30,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105135360] [2024-10-31 22:13:30,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:13:30,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:30,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:30,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:30,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:13:31,003 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:13:31,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:31,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:31,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:31,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:31,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105135360] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:31,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:31,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 22:13:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823364736] [2024-10-31 22:13:31,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:31,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:13:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:13:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:13:31,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:31,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 280 transitions, 2690 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:31,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:31,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:31,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:34,695 INFO L124 PetriNetUnfolderBase]: 991/1844 cut-off events. [2024-10-31 22:13:34,696 INFO L125 PetriNetUnfolderBase]: For 14220/14220 co-relation queries the response was YES. [2024-10-31 22:13:34,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10042 conditions, 1844 events. 991/1844 cut-off events. For 14220/14220 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10429 event pairs, 29 based on Foata normal form. 2/1842 useless extension candidates. Maximal degree in co-relation 9731. Up to 351 conditions per place. [2024-10-31 22:13:34,718 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 191 selfloop transitions, 335 changer transitions 10/537 dead transitions. [2024-10-31 22:13:34,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 537 transitions, 5738 flow [2024-10-31 22:13:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-31 22:13:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-31 22:13:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 523 transitions. [2024-10-31 22:13:34,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37144886363636365 [2024-10-31 22:13:34,724 INFO L175 Difference]: Start difference. First operand has 191 places, 280 transitions, 2690 flow. Second operand 64 states and 523 transitions. [2024-10-31 22:13:34,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 537 transitions, 5738 flow [2024-10-31 22:13:34,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 537 transitions, 5418 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-10-31 22:13:34,840 INFO L231 Difference]: Finished difference. Result has 253 places, 383 transitions, 4190 flow [2024-10-31 22:13:34,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=4190, PETRI_PLACES=253, PETRI_TRANSITIONS=383} [2024-10-31 22:13:34,841 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 229 predicate places. [2024-10-31 22:13:34,841 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 383 transitions, 4190 flow [2024-10-31 22:13:34,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:34,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:34,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:34,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:13:35,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:13:35,043 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:35,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1703561549, now seen corresponding path program 5 times [2024-10-31 22:13:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140204897] [2024-10-31 22:13:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:35,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140204897] [2024-10-31 22:13:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140204897] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726171625] [2024-10-31 22:13:35,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:13:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:35,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:35,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:13:35,478 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:13:35,478 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:35,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:35,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:35,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:35,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726171625] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:35,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:35,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 22:13:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749249698] [2024-10-31 22:13:35,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:35,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 22:13:35,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 22:13:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:13:35,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:35,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 383 transitions, 4190 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:35,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:35,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:35,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:36,849 INFO L124 PetriNetUnfolderBase]: 1001/1870 cut-off events. [2024-10-31 22:13:36,849 INFO L125 PetriNetUnfolderBase]: For 17915/17915 co-relation queries the response was YES. [2024-10-31 22:13:36,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11523 conditions, 1870 events. 1001/1870 cut-off events. For 17915/17915 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10655 event pairs, 73 based on Foata normal form. 2/1868 useless extension candidates. Maximal degree in co-relation 11189. Up to 1184 conditions per place. [2024-10-31 22:13:36,876 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 179 selfloop transitions, 246 changer transitions 8/434 dead transitions. [2024-10-31 22:13:36,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 434 transitions, 5421 flow [2024-10-31 22:13:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:13:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-31 22:13:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 147 transitions. [2024-10-31 22:13:36,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35167464114832536 [2024-10-31 22:13:36,879 INFO L175 Difference]: Start difference. First operand has 253 places, 383 transitions, 4190 flow. Second operand 19 states and 147 transitions. [2024-10-31 22:13:36,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 434 transitions, 5421 flow [2024-10-31 22:13:37,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 434 transitions, 5104 flow, removed 71 selfloop flow, removed 22 redundant places. [2024-10-31 22:13:37,048 INFO L231 Difference]: Finished difference. Result has 254 places, 395 transitions, 4878 flow [2024-10-31 22:13:37,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4878, PETRI_PLACES=254, PETRI_TRANSITIONS=395} [2024-10-31 22:13:37,049 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 230 predicate places. [2024-10-31 22:13:37,049 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 395 transitions, 4878 flow [2024-10-31 22:13:37,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:37,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:37,050 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:37,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:13:37,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:13:37,251 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:37,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -442609211, now seen corresponding path program 6 times [2024-10-31 22:13:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286209622] [2024-10-31 22:13:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:37,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:37,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286209622] [2024-10-31 22:13:37,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286209622] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:37,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846048550] [2024-10-31 22:13:37,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:13:37,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:37,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:37,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:37,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:13:37,531 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-31 22:13:37,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:37,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:37,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:37,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846048550] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:37,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 22:13:37,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30996604] [2024-10-31 22:13:37,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:37,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:13:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:37,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:13:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:13:37,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:37,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 395 transitions, 4878 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:37,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:37,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:37,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:39,280 INFO L124 PetriNetUnfolderBase]: 1016/1903 cut-off events. [2024-10-31 22:13:39,280 INFO L125 PetriNetUnfolderBase]: For 15584/15584 co-relation queries the response was YES. [2024-10-31 22:13:39,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12226 conditions, 1903 events. 1016/1903 cut-off events. For 15584/15584 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10896 event pairs, 84 based on Foata normal form. 2/1905 useless extension candidates. Maximal degree in co-relation 12164. Up to 1240 conditions per place. [2024-10-31 22:13:39,306 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 189 selfloop transitions, 252 changer transitions 8/450 dead transitions. [2024-10-31 22:13:39,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 450 transitions, 6125 flow [2024-10-31 22:13:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 22:13:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-31 22:13:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 177 transitions. [2024-10-31 22:13:39,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3352272727272727 [2024-10-31 22:13:39,308 INFO L175 Difference]: Start difference. First operand has 254 places, 395 transitions, 4878 flow. Second operand 24 states and 177 transitions. [2024-10-31 22:13:39,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 450 transitions, 6125 flow [2024-10-31 22:13:39,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 450 transitions, 6057 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-31 22:13:39,448 INFO L231 Difference]: Finished difference. Result has 277 places, 406 transitions, 5786 flow [2024-10-31 22:13:39,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5786, PETRI_PLACES=277, PETRI_TRANSITIONS=406} [2024-10-31 22:13:39,449 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 253 predicate places. [2024-10-31 22:13:39,450 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 406 transitions, 5786 flow [2024-10-31 22:13:39,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:39,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:39,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:39,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:13:39,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:13:39,653 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:39,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash -269361519, now seen corresponding path program 7 times [2024-10-31 22:13:39,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:39,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000895392] [2024-10-31 22:13:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:39,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:39,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000895392] [2024-10-31 22:13:39,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000895392] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:39,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566051196] [2024-10-31 22:13:39,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:13:39,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:39,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:39,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:39,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:13:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:39,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:39,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:40,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566051196] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:40,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:40,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 22:13:40,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766361621] [2024-10-31 22:13:40,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:40,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:13:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:13:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:13:40,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:40,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 406 transitions, 5786 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:40,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:40,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:40,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:41,546 INFO L124 PetriNetUnfolderBase]: 1037/1958 cut-off events. [2024-10-31 22:13:41,546 INFO L125 PetriNetUnfolderBase]: For 19215/19215 co-relation queries the response was YES. [2024-10-31 22:13:41,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13680 conditions, 1958 events. 1037/1958 cut-off events. For 19215/19215 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11422 event pairs, 84 based on Foata normal form. 2/1960 useless extension candidates. Maximal degree in co-relation 13613. Up to 1317 conditions per place. [2024-10-31 22:13:41,599 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 193 selfloop transitions, 257 changer transitions 8/459 dead transitions. [2024-10-31 22:13:41,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 459 transitions, 7128 flow [2024-10-31 22:13:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 22:13:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-31 22:13:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 158 transitions. [2024-10-31 22:13:41,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.341991341991342 [2024-10-31 22:13:41,606 INFO L175 Difference]: Start difference. First operand has 277 places, 406 transitions, 5786 flow. Second operand 21 states and 158 transitions. [2024-10-31 22:13:41,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 459 transitions, 7128 flow [2024-10-31 22:13:41,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 459 transitions, 7060 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-10-31 22:13:41,784 INFO L231 Difference]: Finished difference. Result has 291 places, 422 transitions, 6954 flow [2024-10-31 22:13:41,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6954, PETRI_PLACES=291, PETRI_TRANSITIONS=422} [2024-10-31 22:13:41,785 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 267 predicate places. [2024-10-31 22:13:41,785 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 422 transitions, 6954 flow [2024-10-31 22:13:41,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:41,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:41,786 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:41,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:13:41,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:13:41,987 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:41,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash 318383803, now seen corresponding path program 8 times [2024-10-31 22:13:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:41,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884931597] [2024-10-31 22:13:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:41,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:42,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:42,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884931597] [2024-10-31 22:13:42,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884931597] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:42,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493705350] [2024-10-31 22:13:42,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:13:42,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:42,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:42,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:42,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:13:42,234 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:13:42,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:42,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:42,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:42,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:42,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493705350] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:42,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:42,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 22:13:42,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744450074] [2024-10-31 22:13:42,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:42,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:13:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:13:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:13:42,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:42,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 422 transitions, 6954 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:42,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:42,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:42,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:44,233 INFO L124 PetriNetUnfolderBase]: 1043/1976 cut-off events. [2024-10-31 22:13:44,234 INFO L125 PetriNetUnfolderBase]: For 23675/23675 co-relation queries the response was YES. [2024-10-31 22:13:44,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15142 conditions, 1976 events. 1043/1976 cut-off events. For 23675/23675 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11558 event pairs, 85 based on Foata normal form. 2/1978 useless extension candidates. Maximal degree in co-relation 15070. Up to 1218 conditions per place. [2024-10-31 22:13:44,260 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 171 selfloop transitions, 293 changer transitions 8/473 dead transitions. [2024-10-31 22:13:44,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 473 transitions, 8237 flow [2024-10-31 22:13:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-31 22:13:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-31 22:13:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 191 transitions. [2024-10-31 22:13:44,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32154882154882153 [2024-10-31 22:13:44,262 INFO L175 Difference]: Start difference. First operand has 291 places, 422 transitions, 6954 flow. Second operand 27 states and 191 transitions. [2024-10-31 22:13:44,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 473 transitions, 8237 flow [2024-10-31 22:13:44,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 473 transitions, 8128 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-10-31 22:13:44,502 INFO L231 Difference]: Finished difference. Result has 309 places, 432 transitions, 7906 flow [2024-10-31 22:13:44,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6852, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7906, PETRI_PLACES=309, PETRI_TRANSITIONS=432} [2024-10-31 22:13:44,503 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 285 predicate places. [2024-10-31 22:13:44,504 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 432 transitions, 7906 flow [2024-10-31 22:13:44,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:44,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:44,504 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:44,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:13:44,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:13:44,708 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:13:44,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1289931379, now seen corresponding path program 9 times [2024-10-31 22:13:44,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:44,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638420122] [2024-10-31 22:13:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:44,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:44,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638420122] [2024-10-31 22:13:44,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638420122] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:44,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832294749] [2024-10-31 22:13:44,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:13:44,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:44,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:45,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e43d03-0510-4d96-8e6e-0f377e2a51ff/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:13:45,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:13:45,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:45,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:13:45,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:45,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:45,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832294749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:45,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:45,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 22:13:45,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417118313] [2024-10-31 22:13:45,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:45,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:13:45,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:13:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:13:45,537 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-31 22:13:45,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 432 transitions, 7906 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:45,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:45,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-31 22:13:45,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand