./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:38:28,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:38:28,869 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:38:28,875 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:38:28,875 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:38:28,899 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:38:28,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:38:28,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:38:28,901 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:38:28,902 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:38:28,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:38:28,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:38:28,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:38:28,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:38:28,904 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:38:28,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:38:28,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:38:28,906 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:38:28,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:38:28,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:38:28,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:38:28,912 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:38:28,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:38:28,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:38:28,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:38:28,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:38:28,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:38:28,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:38:28,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:38:28,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:38:28,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:38:28,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:38:28,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:38:28,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:38:28,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:38:28,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:38:28,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:38:28,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:38:28,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:38:28,917 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:38:28,918 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:38:28,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:38:28,918 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_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2023-11-29 05:38:29,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:38:29,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:38:29,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:38:29,157 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:38:29,158 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:38:29,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2023-11-29 05:38:31,834 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:38:32,061 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:38:32,061 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2023-11-29 05:38:32,068 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/data/87fc917f3/094a3a4023a743328262af04e5a74799/FLAG85faa8f45 [2023-11-29 05:38:32,081 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/data/87fc917f3/094a3a4023a743328262af04e5a74799 [2023-11-29 05:38:32,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:38:32,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:38:32,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:38:32,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:38:32,092 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:38:32,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff72de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32, skipping insertion in model container [2023-11-29 05:38:32,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,120 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:38:32,291 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-29 05:38:32,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:38:32,310 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:38:32,328 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2277,2290] [2023-11-29 05:38:32,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:38:32,344 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:38:32,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32 WrapperNode [2023-11-29 05:38:32,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:38:32,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:38:32,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:38:32,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:38:32,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,379 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 117 [2023-11-29 05:38:32,379 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:38:32,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:38:32,380 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:38:32,380 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:38:32,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,408 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 2, 6]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-29 05:38:32,408 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,417 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:38:32,430 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:38:32,430 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:38:32,430 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:38:32,431 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (1/1) ... [2023-11-29 05:38:32,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:38:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:32,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:38:32,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:38:32,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:38:32,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:38:32,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:38:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:38:32,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:38:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:38:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:38:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:38:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:38:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:38:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:38:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:38:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:38:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:38:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:38:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:38:32,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:38:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:38:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:38:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:38:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:38:32,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:38:32,504 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:38:32,611 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:38:32,614 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:38:32,861 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:38:33,107 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:38:33,108 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 05:38:33,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:38:33 BoogieIcfgContainer [2023-11-29 05:38:33,108 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:38:33,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:38:33,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:38:33,115 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:38:33,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:38:32" (1/3) ... [2023-11-29 05:38:33,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afe12d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:38:33, skipping insertion in model container [2023-11-29 05:38:33,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:32" (2/3) ... [2023-11-29 05:38:33,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afe12d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:38:33, skipping insertion in model container [2023-11-29 05:38:33,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:38:33" (3/3) ... [2023-11-29 05:38:33,118 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-11-29 05:38:33,127 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:38:33,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:38:33,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:38:33,139 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:38:33,183 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:38:33,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2023-11-29 05:38:33,249 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-29 05:38:33,250 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:38:33,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-29 05:38:33,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2023-11-29 05:38:33,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2023-11-29 05:38:33,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:38:33,274 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@995046d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:38:33,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 05:38:33,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:38:33,287 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2023-11-29 05:38:33,288 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:38:33,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:33,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:33,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:33,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash -28525233, now seen corresponding path program 1 times [2023-11-29 05:38:33,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:33,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766243688] [2023-11-29 05:38:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:33,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:33,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766243688] [2023-11-29 05:38:33,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766243688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:33,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:33,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:38:33,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299290246] [2023-11-29 05:38:33,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:38:33,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:38:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:38:33,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:33,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:33,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:33,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:33,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:33,920 INFO L124 PetriNetUnfolderBase]: 219/344 cut-off events. [2023-11-29 05:38:33,921 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-29 05:38:33,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 344 events. 219/344 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1216 event pairs, 45 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 596. Up to 221 conditions per place. [2023-11-29 05:38:33,928 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 35 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2023-11-29 05:38:33,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 183 flow [2023-11-29 05:38:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:38:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:38:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-29 05:38:33,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2023-11-29 05:38:33,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-29 05:38:33,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-29 05:38:33,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:33,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-29 05:38:33,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:33,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:33,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:33,960 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 55 transitions. [2023-11-29 05:38:33,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 183 flow [2023-11-29 05:38:33,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:38:33,967 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 75 flow [2023-11-29 05:38:33,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-11-29 05:38:33,974 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-11-29 05:38:33,974 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 75 flow [2023-11-29 05:38:33,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:33,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:33,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:33,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:38:33,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:33,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash 135500589, now seen corresponding path program 1 times [2023-11-29 05:38:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:33,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987431369] [2023-11-29 05:38:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:34,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987431369] [2023-11-29 05:38:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987431369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:34,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:34,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:38:34,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863709175] [2023-11-29 05:38:34,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:38:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:38:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:38:34,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:34,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:34,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:34,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:34,284 INFO L124 PetriNetUnfolderBase]: 314/520 cut-off events. [2023-11-29 05:38:34,284 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-29 05:38:34,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 520 events. 314/520 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2111 event pairs, 184 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 424. Up to 340 conditions per place. [2023-11-29 05:38:34,290 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 42 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-29 05:38:34,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 224 flow [2023-11-29 05:38:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:38:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:38:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2023-11-29 05:38:34,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-11-29 05:38:34,292 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2023-11-29 05:38:34,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2023-11-29 05:38:34,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:34,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2023-11-29 05:38:34,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,296 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,296 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 75 flow. Second operand 5 states and 70 transitions. [2023-11-29 05:38:34,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 224 flow [2023-11-29 05:38:34,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:38:34,298 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 108 flow [2023-11-29 05:38:34,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2023-11-29 05:38:34,300 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-11-29 05:38:34,300 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 108 flow [2023-11-29 05:38:34,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:34,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:38:34,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:34,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash -891589587, now seen corresponding path program 1 times [2023-11-29 05:38:34,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:34,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098703428] [2023-11-29 05:38:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:34,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098703428] [2023-11-29 05:38:34,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098703428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:34,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:34,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:38:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770760713] [2023-11-29 05:38:34,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:34,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:38:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:38:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:38:34,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:34,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:34,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:34,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:34,571 INFO L124 PetriNetUnfolderBase]: 245/408 cut-off events. [2023-11-29 05:38:34,571 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-29 05:38:34,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 408 events. 245/408 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1573 event pairs, 139 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 769. Up to 340 conditions per place. [2023-11-29 05:38:34,574 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2023-11-29 05:38:34,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 226 flow [2023-11-29 05:38:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:38:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:38:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-29 05:38:34,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-29 05:38:34,576 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-29 05:38:34,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-29 05:38:34,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:34,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-29 05:38:34,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,579 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,579 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 108 flow. Second operand 5 states and 66 transitions. [2023-11-29 05:38:34,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 226 flow [2023-11-29 05:38:34,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 05:38:34,581 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 92 flow [2023-11-29 05:38:34,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-29 05:38:34,583 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-11-29 05:38:34,583 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 92 flow [2023-11-29 05:38:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:34,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:34,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:38:34,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:34,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -582652510, now seen corresponding path program 1 times [2023-11-29 05:38:34,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443016983] [2023-11-29 05:38:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:34,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:34,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443016983] [2023-11-29 05:38:34,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443016983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:34,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:34,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:38:34,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508290334] [2023-11-29 05:38:34,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:34,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:38:34,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:34,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:38:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:38:34,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:34,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:34,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:34,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:34,850 INFO L124 PetriNetUnfolderBase]: 312/517 cut-off events. [2023-11-29 05:38:34,850 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-11-29 05:38:34,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 517 events. 312/517 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2121 event pairs, 184 based on Foata normal form. 18/526 useless extension candidates. Maximal degree in co-relation 1180. Up to 340 conditions per place. [2023-11-29 05:38:34,855 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-11-29 05:38:34,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 232 flow [2023-11-29 05:38:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:38:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:38:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-29 05:38:34,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-11-29 05:38:34,857 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-29 05:38:34,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-29 05:38:34,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:34,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-29 05:38:34,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,859 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 92 flow. Second operand 5 states and 66 transitions. [2023-11-29 05:38:34,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 232 flow [2023-11-29 05:38:34,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 214 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:34,862 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 102 flow [2023-11-29 05:38:34,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-29 05:38:34,863 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-11-29 05:38:34,863 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 102 flow [2023-11-29 05:38:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:34,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:34,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:38:34,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:34,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash -700286942, now seen corresponding path program 1 times [2023-11-29 05:38:34,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:34,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107203409] [2023-11-29 05:38:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:34,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:34,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:34,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107203409] [2023-11-29 05:38:34,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107203409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:34,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:35,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:38:35,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990898370] [2023-11-29 05:38:35,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:35,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:38:35,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:38:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:38:35,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:35,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:35,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:35,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:35,135 INFO L124 PetriNetUnfolderBase]: 291/486 cut-off events. [2023-11-29 05:38:35,136 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-29 05:38:35,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 486 events. 291/486 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1968 event pairs, 123 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 1072. Up to 254 conditions per place. [2023-11-29 05:38:35,140 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 37 selfloop transitions, 5 changer transitions 12/57 dead transitions. [2023-11-29 05:38:35,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 276 flow [2023-11-29 05:38:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:38:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:38:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2023-11-29 05:38:35,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5310344827586206 [2023-11-29 05:38:35,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2023-11-29 05:38:35,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2023-11-29 05:38:35,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:35,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2023-11-29 05:38:35,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,155 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 102 flow. Second operand 5 states and 77 transitions. [2023-11-29 05:38:35,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 276 flow [2023-11-29 05:38:35,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 57 transitions, 270 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 05:38:35,157 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 113 flow [2023-11-29 05:38:35,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-29 05:38:35,158 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-11-29 05:38:35,158 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 113 flow [2023-11-29 05:38:35,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:35,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:38:35,159 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:35,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1671653826, now seen corresponding path program 1 times [2023-11-29 05:38:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285244663] [2023-11-29 05:38:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:35,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285244663] [2023-11-29 05:38:35,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285244663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105368374] [2023-11-29 05:38:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:35,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:35,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:35,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:38:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:35,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:38:35,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:35,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105368374] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:35,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:38:35,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2023-11-29 05:38:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127423812] [2023-11-29 05:38:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:38:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:38:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:38:35,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:35,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:35,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:35,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:35,992 INFO L124 PetriNetUnfolderBase]: 277/464 cut-off events. [2023-11-29 05:38:35,992 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-11-29 05:38:35,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 464 events. 277/464 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1786 event pairs, 99 based on Foata normal form. 15/473 useless extension candidates. Maximal degree in co-relation 1120. Up to 231 conditions per place. [2023-11-29 05:38:35,996 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 44 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-29 05:38:35,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 283 flow [2023-11-29 05:38:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-29 05:38:35,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-29 05:38:35,998 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-29 05:38:35,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-29 05:38:35,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:35,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-29 05:38:35,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,001 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,001 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 113 flow. Second operand 7 states and 86 transitions. [2023-11-29 05:38:36,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 283 flow [2023-11-29 05:38:36,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 268 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-29 05:38:36,004 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 134 flow [2023-11-29 05:38:36,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-29 05:38:36,005 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2023-11-29 05:38:36,005 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 134 flow [2023-11-29 05:38:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:36,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:36,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:36,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:36,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:36,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash 441212046, now seen corresponding path program 1 times [2023-11-29 05:38:36,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:36,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871632541] [2023-11-29 05:38:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:36,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871632541] [2023-11-29 05:38:36,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871632541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184686609] [2023-11-29 05:38:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:36,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:36,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:36,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:36,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:38:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:36,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:38:36,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:36,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:36,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184686609] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:36,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:38:36,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-29 05:38:36,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118221574] [2023-11-29 05:38:36,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:36,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:38:36,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:36,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:38:36,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:38:36,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:36,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:36,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:36,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:36,971 INFO L124 PetriNetUnfolderBase]: 383/696 cut-off events. [2023-11-29 05:38:36,971 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2023-11-29 05:38:36,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 696 events. 383/696 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3153 event pairs, 153 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1726. Up to 243 conditions per place. [2023-11-29 05:38:36,977 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 53 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-11-29 05:38:36,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 368 flow [2023-11-29 05:38:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-29 05:38:36,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2023-11-29 05:38:36,978 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-29 05:38:36,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-29 05:38:36,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:36,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-29 05:38:36,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,980 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,980 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 134 flow. Second operand 7 states and 90 transitions. [2023-11-29 05:38:36,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 368 flow [2023-11-29 05:38:36,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-29 05:38:36,983 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 152 flow [2023-11-29 05:38:36,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-11-29 05:38:36,994 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-29 05:38:36,994 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 152 flow [2023-11-29 05:38:36,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:36,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:36,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:37,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:38:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:38:37,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:37,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 272603849, now seen corresponding path program 1 times [2023-11-29 05:38:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:37,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778665314] [2023-11-29 05:38:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:37,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:37,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778665314] [2023-11-29 05:38:37,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778665314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:37,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:37,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006595667] [2023-11-29 05:38:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:37,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:37,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:37,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:37,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:37,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:37,942 INFO L124 PetriNetUnfolderBase]: 396/717 cut-off events. [2023-11-29 05:38:37,942 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2023-11-29 05:38:37,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 717 events. 396/717 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3201 event pairs, 117 based on Foata normal form. 6/720 useless extension candidates. Maximal degree in co-relation 1882. Up to 589 conditions per place. [2023-11-29 05:38:37,948 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 42 selfloop transitions, 11 changer transitions 7/63 dead transitions. [2023-11-29 05:38:37,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 359 flow [2023-11-29 05:38:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2023-11-29 05:38:37,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2023-11-29 05:38:37,950 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2023-11-29 05:38:37,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2023-11-29 05:38:37,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:37,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2023-11-29 05:38:37,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:37,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:37,952 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:37,952 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 152 flow. Second operand 7 states and 90 transitions. [2023-11-29 05:38:37,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 359 flow [2023-11-29 05:38:37,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:38:37,955 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 230 flow [2023-11-29 05:38:37,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-11-29 05:38:37,956 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-11-29 05:38:37,956 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 230 flow [2023-11-29 05:38:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:37,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:37,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:37,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:38:37,957 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -119994201, now seen corresponding path program 2 times [2023-11-29 05:38:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:37,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636958997] [2023-11-29 05:38:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:38,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636958997] [2023-11-29 05:38:38,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636958997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:38,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:38,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960654945] [2023-11-29 05:38:38,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:38,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:38,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:38,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:38,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:38,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:38,668 INFO L124 PetriNetUnfolderBase]: 394/714 cut-off events. [2023-11-29 05:38:38,668 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2023-11-29 05:38:38,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 714 events. 394/714 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3221 event pairs, 87 based on Foata normal form. 6/719 useless extension candidates. Maximal degree in co-relation 2194. Up to 589 conditions per place. [2023-11-29 05:38:38,674 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 44 selfloop transitions, 10 changer transitions 11/68 dead transitions. [2023-11-29 05:38:38,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 453 flow [2023-11-29 05:38:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2023-11-29 05:38:38,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2023-11-29 05:38:38,676 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 92 transitions. [2023-11-29 05:38:38,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 92 transitions. [2023-11-29 05:38:38,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:38,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 92 transitions. [2023-11-29 05:38:38,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,677 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,677 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 230 flow. Second operand 7 states and 92 transitions. [2023-11-29 05:38:38,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 453 flow [2023-11-29 05:38:38,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 423 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-29 05:38:38,683 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 245 flow [2023-11-29 05:38:38,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-11-29 05:38:38,684 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-11-29 05:38:38,684 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 245 flow [2023-11-29 05:38:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:38,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:38,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:38:38,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:38,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:38,685 INFO L85 PathProgramCache]: Analyzing trace with hash 159985065, now seen corresponding path program 3 times [2023-11-29 05:38:38,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:38,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329721943] [2023-11-29 05:38:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:38,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:39,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:39,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329721943] [2023-11-29 05:38:39,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329721943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:39,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:39,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137265118] [2023-11-29 05:38:39,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:39,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:39,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:39,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:39,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:39,276 INFO L124 PetriNetUnfolderBase]: 376/691 cut-off events. [2023-11-29 05:38:39,276 INFO L125 PetriNetUnfolderBase]: For 843/852 co-relation queries the response was YES. [2023-11-29 05:38:39,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2151 conditions, 691 events. 376/691 cut-off events. For 843/852 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3037 event pairs, 153 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 2120. Up to 583 conditions per place. [2023-11-29 05:38:39,282 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 34 selfloop transitions, 14 changer transitions 11/62 dead transitions. [2023-11-29 05:38:39,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 437 flow [2023-11-29 05:38:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-29 05:38:39,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-29 05:38:39,283 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-29 05:38:39,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-29 05:38:39,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:39,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-29 05:38:39,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,285 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,285 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 245 flow. Second operand 7 states and 86 transitions. [2023-11-29 05:38:39,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 437 flow [2023-11-29 05:38:39,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 405 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:39,289 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 286 flow [2023-11-29 05:38:39,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-11-29 05:38:39,290 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-11-29 05:38:39,290 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 286 flow [2023-11-29 05:38:39,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:39,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:39,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:38:39,290 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:39,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1308181757, now seen corresponding path program 1 times [2023-11-29 05:38:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:39,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809972993] [2023-11-29 05:38:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:39,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:39,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809972993] [2023-11-29 05:38:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809972993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:39,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826004309] [2023-11-29 05:38:39,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:39,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:39,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 286 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:39,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:39,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:39,869 INFO L124 PetriNetUnfolderBase]: 352/642 cut-off events. [2023-11-29 05:38:39,869 INFO L125 PetriNetUnfolderBase]: For 843/849 co-relation queries the response was YES. [2023-11-29 05:38:39,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 642 events. 352/642 cut-off events. For 843/849 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2699 event pairs, 159 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 2024. Up to 583 conditions per place. [2023-11-29 05:38:39,874 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 13 changer transitions 4/55 dead transitions. [2023-11-29 05:38:39,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 427 flow [2023-11-29 05:38:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2023-11-29 05:38:39,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2023-11-29 05:38:39,876 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 76 transitions. [2023-11-29 05:38:39,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 76 transitions. [2023-11-29 05:38:39,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:39,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 76 transitions. [2023-11-29 05:38:39,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,877 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,878 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 286 flow. Second operand 7 states and 76 transitions. [2023-11-29 05:38:39,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 427 flow [2023-11-29 05:38:39,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 415 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 05:38:39,883 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 309 flow [2023-11-29 05:38:39,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-11-29 05:38:39,884 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2023-11-29 05:38:39,884 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 309 flow [2023-11-29 05:38:39,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:39,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:39,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:38:39,884 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:39,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:39,885 INFO L85 PathProgramCache]: Analyzing trace with hash 814749745, now seen corresponding path program 2 times [2023-11-29 05:38:39,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:39,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306317923] [2023-11-29 05:38:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:39,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:40,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306317923] [2023-11-29 05:38:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306317923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:40,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114184366] [2023-11-29 05:38:40,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:38:40,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:40,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:40,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:38:40,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:40,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:40,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:38:40,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:40,577 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:38:40,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-29 05:38:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:40,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:40,705 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:38:40,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:38:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:40,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114184366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:40,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:40,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-11-29 05:38:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146694663] [2023-11-29 05:38:40,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:40,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:38:40,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:40,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:38:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:38:40,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:40,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 309 flow. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:40,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:40,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:40,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:41,047 INFO L124 PetriNetUnfolderBase]: 368/665 cut-off events. [2023-11-29 05:38:41,047 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2023-11-29 05:38:41,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 665 events. 368/665 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2837 event pairs, 59 based on Foata normal form. 16/680 useless extension candidates. Maximal degree in co-relation 2120. Up to 423 conditions per place. [2023-11-29 05:38:41,052 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 55 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2023-11-29 05:38:41,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 548 flow [2023-11-29 05:38:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:38:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:38:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2023-11-29 05:38:41,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2023-11-29 05:38:41,053 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 102 transitions. [2023-11-29 05:38:41,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 102 transitions. [2023-11-29 05:38:41,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:41,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 102 transitions. [2023-11-29 05:38:41,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:41,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:41,055 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:41,055 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 309 flow. Second operand 8 states and 102 transitions. [2023-11-29 05:38:41,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 548 flow [2023-11-29 05:38:41,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 517 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:41,060 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 320 flow [2023-11-29 05:38:41,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2023-11-29 05:38:41,061 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2023-11-29 05:38:41,061 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 320 flow [2023-11-29 05:38:41,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:41,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:41,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:41,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:41,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:38:41,262 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:41,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:41,262 INFO L85 PathProgramCache]: Analyzing trace with hash 698164213, now seen corresponding path program 3 times [2023-11-29 05:38:41,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:41,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495475365] [2023-11-29 05:38:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:41,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:41,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:41,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495475365] [2023-11-29 05:38:41,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495475365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:41,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728885426] [2023-11-29 05:38:41,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:38:41,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:41,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:41,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:38:41,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:38:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:41,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:38:41,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:41,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:38:41,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-29 05:38:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:41,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:41,996 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:38:41,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:38:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:42,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728885426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:42,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:42,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2023-11-29 05:38:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944447540] [2023-11-29 05:38:42,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:42,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:38:42,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:38:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:38:42,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:42,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 320 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:42,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:42,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:42,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:42,475 INFO L124 PetriNetUnfolderBase]: 508/939 cut-off events. [2023-11-29 05:38:42,475 INFO L125 PetriNetUnfolderBase]: For 1800/1800 co-relation queries the response was YES. [2023-11-29 05:38:42,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 939 events. 508/939 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4531 event pairs, 121 based on Foata normal form. 24/962 useless extension candidates. Maximal degree in co-relation 3111. Up to 661 conditions per place. [2023-11-29 05:38:42,484 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 74 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2023-11-29 05:38:42,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 721 flow [2023-11-29 05:38:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:38:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:38:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2023-11-29 05:38:42,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-29 05:38:42,486 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 150 transitions. [2023-11-29 05:38:42,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 150 transitions. [2023-11-29 05:38:42,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:42,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 150 transitions. [2023-11-29 05:38:42,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:42,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:42,489 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:42,489 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 320 flow. Second operand 12 states and 150 transitions. [2023-11-29 05:38:42,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 721 flow [2023-11-29 05:38:42,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 656 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-29 05:38:42,498 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 416 flow [2023-11-29 05:38:42,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=416, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-29 05:38:42,499 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2023-11-29 05:38:42,499 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 416 flow [2023-11-29 05:38:42,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:42,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:42,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:42,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:42,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:38:42,704 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:42,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1966259215, now seen corresponding path program 4 times [2023-11-29 05:38:42,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:42,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234648025] [2023-11-29 05:38:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:42,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:43,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:43,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234648025] [2023-11-29 05:38:43,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234648025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:43,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:43,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:43,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021716835] [2023-11-29 05:38:43,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:43,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:43,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:43,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:43,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 416 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:43,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:43,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:43,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:43,341 INFO L124 PetriNetUnfolderBase]: 526/969 cut-off events. [2023-11-29 05:38:43,341 INFO L125 PetriNetUnfolderBase]: For 1939/1939 co-relation queries the response was YES. [2023-11-29 05:38:43,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 969 events. 526/969 cut-off events. For 1939/1939 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4760 event pairs, 177 based on Foata normal form. 12/980 useless extension candidates. Maximal degree in co-relation 3392. Up to 897 conditions per place. [2023-11-29 05:38:43,350 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 53 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2023-11-29 05:38:43,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 608 flow [2023-11-29 05:38:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-29 05:38:43,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-29 05:38:43,352 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-29 05:38:43,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-29 05:38:43,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:43,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-29 05:38:43,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:43,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:43,353 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:43,353 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 416 flow. Second operand 7 states and 84 transitions. [2023-11-29 05:38:43,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 608 flow [2023-11-29 05:38:43,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 579 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:43,360 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 431 flow [2023-11-29 05:38:43,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-29 05:38:43,361 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2023-11-29 05:38:43,361 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 431 flow [2023-11-29 05:38:43,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:43,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:43,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:43,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:38:43,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:43,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:43,362 INFO L85 PathProgramCache]: Analyzing trace with hash 595539543, now seen corresponding path program 4 times [2023-11-29 05:38:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195225774] [2023-11-29 05:38:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:43,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:43,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195225774] [2023-11-29 05:38:43,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195225774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:43,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:43,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653648564] [2023-11-29 05:38:43,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:43,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:43,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:43,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:43,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 431 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:43,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:43,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:43,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:43,993 INFO L124 PetriNetUnfolderBase]: 480/866 cut-off events. [2023-11-29 05:38:43,993 INFO L125 PetriNetUnfolderBase]: For 2025/2025 co-relation queries the response was YES. [2023-11-29 05:38:43,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3206 conditions, 866 events. 480/866 cut-off events. For 2025/2025 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3984 event pairs, 167 based on Foata normal form. 4/869 useless extension candidates. Maximal degree in co-relation 3169. Up to 817 conditions per place. [2023-11-29 05:38:44,002 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 48 selfloop transitions, 12 changer transitions 3/66 dead transitions. [2023-11-29 05:38:44,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 563 flow [2023-11-29 05:38:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2023-11-29 05:38:44,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2023-11-29 05:38:44,004 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 79 transitions. [2023-11-29 05:38:44,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 79 transitions. [2023-11-29 05:38:44,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:44,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 79 transitions. [2023-11-29 05:38:44,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,005 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,006 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 431 flow. Second operand 7 states and 79 transitions. [2023-11-29 05:38:44,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 563 flow [2023-11-29 05:38:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 537 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:44,013 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 404 flow [2023-11-29 05:38:44,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2023-11-29 05:38:44,014 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2023-11-29 05:38:44,014 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 404 flow [2023-11-29 05:38:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:44,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:44,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:38:44,015 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:44,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash 421230357, now seen corresponding path program 5 times [2023-11-29 05:38:44,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:44,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408649234] [2023-11-29 05:38:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:44,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408649234] [2023-11-29 05:38:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408649234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15870781] [2023-11-29 05:38:44,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:38:44,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:44,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:44,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:38:44,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:44,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:38:44,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:44,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:38:44,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-29 05:38:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:44,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:44,685 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:38:44,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:38:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15870781] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:44,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:38:44,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2023-11-29 05:38:44,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145010797] [2023-11-29 05:38:44,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:44,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:38:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:38:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:38:44,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:44,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:44,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:44,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:44,958 INFO L124 PetriNetUnfolderBase]: 454/837 cut-off events. [2023-11-29 05:38:44,958 INFO L125 PetriNetUnfolderBase]: For 1964/1973 co-relation queries the response was YES. [2023-11-29 05:38:44,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 837 events. 454/837 cut-off events. For 1964/1973 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3919 event pairs, 135 based on Foata normal form. 30/865 useless extension candidates. Maximal degree in co-relation 2970. Up to 658 conditions per place. [2023-11-29 05:38:44,967 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 57 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2023-11-29 05:38:44,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 607 flow [2023-11-29 05:38:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:38:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:38:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2023-11-29 05:38:44,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2023-11-29 05:38:44,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 81 transitions. [2023-11-29 05:38:44,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 81 transitions. [2023-11-29 05:38:44,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:44,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 81 transitions. [2023-11-29 05:38:44,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,969 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,969 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 404 flow. Second operand 6 states and 81 transitions. [2023-11-29 05:38:44,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 607 flow [2023-11-29 05:38:44,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 583 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:44,975 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 412 flow [2023-11-29 05:38:44,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=412, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-29 05:38:44,976 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2023-11-29 05:38:44,976 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 412 flow [2023-11-29 05:38:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:44,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:38:45,177 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:45,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -837236101, now seen corresponding path program 5 times [2023-11-29 05:38:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742156774] [2023-11-29 05:38:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:45,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:45,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:45,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742156774] [2023-11-29 05:38:45,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742156774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:45,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881976963] [2023-11-29 05:38:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:38:45,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:45,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:45,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:45,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:38:45,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:45,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:45,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:38:45,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:45,727 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:38:45,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-29 05:38:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:45,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:45,844 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:38:45,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:38:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:45,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881976963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:45,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:45,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-11-29 05:38:45,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721575140] [2023-11-29 05:38:45,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:38:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:38:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:38:45,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:45,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 412 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:45,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:45,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:45,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:46,208 INFO L124 PetriNetUnfolderBase]: 472/867 cut-off events. [2023-11-29 05:38:46,208 INFO L125 PetriNetUnfolderBase]: For 2018/2027 co-relation queries the response was YES. [2023-11-29 05:38:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 867 events. 472/867 cut-off events. For 2018/2027 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4086 event pairs, 127 based on Foata normal form. 18/883 useless extension candidates. Maximal degree in co-relation 3171. Up to 645 conditions per place. [2023-11-29 05:38:46,216 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 59 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2023-11-29 05:38:46,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 79 transitions, 669 flow [2023-11-29 05:38:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:38:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:38:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2023-11-29 05:38:46,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-29 05:38:46,217 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 98 transitions. [2023-11-29 05:38:46,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 98 transitions. [2023-11-29 05:38:46,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:46,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 98 transitions. [2023-11-29 05:38:46,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,219 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 29.0) internal successors, (261), 9 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,219 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 412 flow. Second operand 8 states and 98 transitions. [2023-11-29 05:38:46,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 79 transitions, 669 flow [2023-11-29 05:38:46,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 647 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:38:46,228 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 438 flow [2023-11-29 05:38:46,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-11-29 05:38:46,228 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2023-11-29 05:38:46,228 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 438 flow [2023-11-29 05:38:46,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:46,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:46,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:38:46,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:38:46,430 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:46,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash -859964759, now seen corresponding path program 6 times [2023-11-29 05:38:46,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:46,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81481025] [2023-11-29 05:38:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:46,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:46,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:46,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81481025] [2023-11-29 05:38:46,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81481025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:46,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:46,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:46,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061912053] [2023-11-29 05:38:46,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:46,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:46,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:46,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:46,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:46,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:46,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:46,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:46,900 INFO L124 PetriNetUnfolderBase]: 426/764 cut-off events. [2023-11-29 05:38:46,901 INFO L125 PetriNetUnfolderBase]: For 2321/2330 co-relation queries the response was YES. [2023-11-29 05:38:46,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 764 events. 426/764 cut-off events. For 2321/2330 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3382 event pairs, 135 based on Foata normal form. 10/772 useless extension candidates. Maximal degree in co-relation 2953. Up to 723 conditions per place. [2023-11-29 05:38:46,906 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 45 selfloop transitions, 11 changer transitions 3/62 dead transitions. [2023-11-29 05:38:46,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 62 transitions, 553 flow [2023-11-29 05:38:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2023-11-29 05:38:46,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2023-11-29 05:38:46,907 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 75 transitions. [2023-11-29 05:38:46,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 75 transitions. [2023-11-29 05:38:46,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:46,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 75 transitions. [2023-11-29 05:38:46,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,909 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,909 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 438 flow. Second operand 7 states and 75 transitions. [2023-11-29 05:38:46,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 62 transitions, 553 flow [2023-11-29 05:38:46,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 499 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-29 05:38:46,915 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 384 flow [2023-11-29 05:38:46,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-11-29 05:38:46,916 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2023-11-29 05:38:46,916 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 384 flow [2023-11-29 05:38:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:46,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:46,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 05:38:46,916 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:46,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -795919207, now seen corresponding path program 6 times [2023-11-29 05:38:46,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:46,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52721150] [2023-11-29 05:38:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:46,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52721150] [2023-11-29 05:38:47,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52721150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:47,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:47,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:38:47,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538533479] [2023-11-29 05:38:47,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:47,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:47,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:47,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:47,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:38:47,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:47,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 384 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:47,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:47,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:47,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:47,416 INFO L124 PetriNetUnfolderBase]: 376/668 cut-off events. [2023-11-29 05:38:47,416 INFO L125 PetriNetUnfolderBase]: For 1636/1645 co-relation queries the response was YES. [2023-11-29 05:38:47,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2583 conditions, 668 events. 376/668 cut-off events. For 1636/1645 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2806 event pairs, 105 based on Foata normal form. 18/684 useless extension candidates. Maximal degree in co-relation 2546. Up to 615 conditions per place. [2023-11-29 05:38:47,422 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 50 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-11-29 05:38:47,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 551 flow [2023-11-29 05:38:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2023-11-29 05:38:47,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2023-11-29 05:38:47,423 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 79 transitions. [2023-11-29 05:38:47,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 79 transitions. [2023-11-29 05:38:47,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:47,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 79 transitions. [2023-11-29 05:38:47,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:47,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:47,425 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:47,425 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 384 flow. Second operand 7 states and 79 transitions. [2023-11-29 05:38:47,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 551 flow [2023-11-29 05:38:47,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 529 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:47,433 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 390 flow [2023-11-29 05:38:47,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-11-29 05:38:47,433 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2023-11-29 05:38:47,433 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 390 flow [2023-11-29 05:38:47,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:47,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:47,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:47,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 05:38:47,434 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:47,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash 147341554, now seen corresponding path program 1 times [2023-11-29 05:38:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:47,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624549627] [2023-11-29 05:38:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:47,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:47,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624549627] [2023-11-29 05:38:47,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624549627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:47,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103978010] [2023-11-29 05:38:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:47,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:47,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:47,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:38:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:47,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:38:47,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:47,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:47,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103978010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:47,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:47,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-29 05:38:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433251730] [2023-11-29 05:38:47,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:47,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:38:47,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:38:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:38:47,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:47,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:47,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:47,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:47,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:48,063 INFO L124 PetriNetUnfolderBase]: 822/1460 cut-off events. [2023-11-29 05:38:48,063 INFO L125 PetriNetUnfolderBase]: For 3564/3573 co-relation queries the response was YES. [2023-11-29 05:38:48,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5267 conditions, 1460 events. 822/1460 cut-off events. For 3564/3573 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7432 event pairs, 108 based on Foata normal form. 14/1472 useless extension candidates. Maximal degree in co-relation 5229. Up to 593 conditions per place. [2023-11-29 05:38:48,076 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 88 selfloop transitions, 20 changer transitions 2/113 dead transitions. [2023-11-29 05:38:48,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 905 flow [2023-11-29 05:38:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2023-11-29 05:38:48,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009852216748769 [2023-11-29 05:38:48,079 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 122 transitions. [2023-11-29 05:38:48,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 122 transitions. [2023-11-29 05:38:48,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:48,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 122 transitions. [2023-11-29 05:38:48,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:48,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:48,081 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:48,082 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 390 flow. Second operand 7 states and 122 transitions. [2023-11-29 05:38:48,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 905 flow [2023-11-29 05:38:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 881 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 05:38:48,096 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 514 flow [2023-11-29 05:38:48,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-11-29 05:38:48,097 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2023-11-29 05:38:48,097 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 514 flow [2023-11-29 05:38:48,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:48,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:48,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:48,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:38:48,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:48,298 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:48,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:48,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1164924930, now seen corresponding path program 2 times [2023-11-29 05:38:48,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:48,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27859321] [2023-11-29 05:38:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:48,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:48,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27859321] [2023-11-29 05:38:48,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27859321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:48,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322420529] [2023-11-29 05:38:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:38:48,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:48,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:48,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:48,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:38:48,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:48,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:48,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:38:48,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:48,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:38:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322420529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:48,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:48,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-29 05:38:48,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806678560] [2023-11-29 05:38:48,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:38:48,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:38:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:38:48,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:48,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:48,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:48,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:48,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:48,980 INFO L124 PetriNetUnfolderBase]: 1290/2284 cut-off events. [2023-11-29 05:38:48,981 INFO L125 PetriNetUnfolderBase]: For 6348/6357 co-relation queries the response was YES. [2023-11-29 05:38:48,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8427 conditions, 2284 events. 1290/2284 cut-off events. For 6348/6357 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12877 event pairs, 364 based on Foata normal form. 14/2295 useless extension candidates. Maximal degree in co-relation 8386. Up to 1465 conditions per place. [2023-11-29 05:38:48,996 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 98 selfloop transitions, 17 changer transitions 2/120 dead transitions. [2023-11-29 05:38:48,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 1048 flow [2023-11-29 05:38:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:38:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:38:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2023-11-29 05:38:49,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812807881773399 [2023-11-29 05:38:49,000 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 118 transitions. [2023-11-29 05:38:49,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 118 transitions. [2023-11-29 05:38:49,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:49,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 118 transitions. [2023-11-29 05:38:49,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:49,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:49,002 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:49,002 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 514 flow. Second operand 7 states and 118 transitions. [2023-11-29 05:38:49,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 1048 flow [2023-11-29 05:38:49,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 120 transitions, 1019 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-29 05:38:49,022 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 630 flow [2023-11-29 05:38:49,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2023-11-29 05:38:49,022 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2023-11-29 05:38:49,022 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 630 flow [2023-11-29 05:38:49,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:49,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:49,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:49,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:38:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:49,227 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:49,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1903390278, now seen corresponding path program 3 times [2023-11-29 05:38:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:49,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020257818] [2023-11-29 05:38:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020257818] [2023-11-29 05:38:49,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020257818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:49,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348618519] [2023-11-29 05:38:49,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:38:49,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:49,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:49,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:38:49,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:38:49,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:49,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:38:49,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:49,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348618519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:49,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:49,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-29 05:38:49,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983076588] [2023-11-29 05:38:49,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:49,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:38:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:38:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:38:49,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:49,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 630 flow. Second operand has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:49,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:49,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:49,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:50,375 INFO L124 PetriNetUnfolderBase]: 2551/4630 cut-off events. [2023-11-29 05:38:50,375 INFO L125 PetriNetUnfolderBase]: For 14049/14058 co-relation queries the response was YES. [2023-11-29 05:38:50,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17615 conditions, 4630 events. 2551/4630 cut-off events. For 14049/14058 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30975 event pairs, 1562 based on Foata normal form. 180/4804 useless extension candidates. Maximal degree in co-relation 16580. Up to 2267 conditions per place. [2023-11-29 05:38:50,400 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 185 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2023-11-29 05:38:50,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 227 transitions, 2332 flow [2023-11-29 05:38:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:38:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:38:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 192 transitions. [2023-11-29 05:38:50,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-29 05:38:50,402 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 192 transitions. [2023-11-29 05:38:50,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 192 transitions. [2023-11-29 05:38:50,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:50,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 192 transitions. [2023-11-29 05:38:50,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.0) internal successors, (192), 16 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:50,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:50,405 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:50,405 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 630 flow. Second operand 16 states and 192 transitions. [2023-11-29 05:38:50,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 227 transitions, 2332 flow [2023-11-29 05:38:50,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 227 transitions, 2219 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-11-29 05:38:50,453 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 1130 flow [2023-11-29 05:38:50,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1130, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2023-11-29 05:38:50,453 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 76 predicate places. [2023-11-29 05:38:50,454 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 1130 flow [2023-11-29 05:38:50,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:50,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:50,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:50,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:50,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:38:50,655 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:50,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:50,655 INFO L85 PathProgramCache]: Analyzing trace with hash 558959314, now seen corresponding path program 4 times [2023-11-29 05:38:50,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:50,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562717044] [2023-11-29 05:38:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:50,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:50,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562717044] [2023-11-29 05:38:50,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562717044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:50,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734267087] [2023-11-29 05:38:50,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:38:50,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:50,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:50,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:50,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:38:50,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:38:50,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:50,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:38:50,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:38:51,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:38:51,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734267087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:51,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:38:51,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2023-11-29 05:38:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948215725] [2023-11-29 05:38:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:51,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:38:51,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:38:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:38:51,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:51,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 1130 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:51,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:51,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:51,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:51,764 INFO L124 PetriNetUnfolderBase]: 3157/5888 cut-off events. [2023-11-29 05:38:51,764 INFO L125 PetriNetUnfolderBase]: For 18401/18401 co-relation queries the response was YES. [2023-11-29 05:38:51,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21720 conditions, 5888 events. 3157/5888 cut-off events. For 18401/18401 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 43213 event pairs, 354 based on Foata normal form. 8/5890 useless extension candidates. Maximal degree in co-relation 20467. Up to 1828 conditions per place. [2023-11-29 05:38:51,796 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 110 selfloop transitions, 69 changer transitions 7/189 dead transitions. [2023-11-29 05:38:51,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1979 flow [2023-11-29 05:38:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:38:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:38:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2023-11-29 05:38:51,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44482758620689655 [2023-11-29 05:38:51,797 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 129 transitions. [2023-11-29 05:38:51,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 129 transitions. [2023-11-29 05:38:51,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:51,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 129 transitions. [2023-11-29 05:38:51,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:51,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:51,799 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:51,799 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 1130 flow. Second operand 10 states and 129 transitions. [2023-11-29 05:38:51,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1979 flow [2023-11-29 05:38:51,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 189 transitions, 1954 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-29 05:38:51,875 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1400 flow [2023-11-29 05:38:51,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1400, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2023-11-29 05:38:51,875 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 86 predicate places. [2023-11-29 05:38:51,876 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1400 flow [2023-11-29 05:38:51,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:51,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:51,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:51,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:52,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:38:52,076 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:52,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash 926264904, now seen corresponding path program 5 times [2023-11-29 05:38:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:52,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404566963] [2023-11-29 05:38:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:52,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404566963] [2023-11-29 05:38:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404566963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348114433] [2023-11-29 05:38:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:38:52,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:52,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:52,183 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:52,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:38:52,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:38:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:52,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:38:52,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:52,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:38:52,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348114433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:52,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:52,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-29 05:38:52,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173507058] [2023-11-29 05:38:52,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:52,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:38:52,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:38:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:38:52,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:52,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1400 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:52,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:52,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:52,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:52,985 INFO L124 PetriNetUnfolderBase]: 1849/3449 cut-off events. [2023-11-29 05:38:52,985 INFO L125 PetriNetUnfolderBase]: For 14828/14834 co-relation queries the response was YES. [2023-11-29 05:38:52,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14828 conditions, 3449 events. 1849/3449 cut-off events. For 14828/14834 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21934 event pairs, 748 based on Foata normal form. 91/3538 useless extension candidates. Maximal degree in co-relation 14666. Up to 2301 conditions per place. [2023-11-29 05:38:53,000 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 74 selfloop transitions, 20 changer transitions 115/212 dead transitions. [2023-11-29 05:38:53,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 212 transitions, 2417 flow [2023-11-29 05:38:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:38:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:38:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 188 transitions. [2023-11-29 05:38:53,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432183908045977 [2023-11-29 05:38:53,001 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 188 transitions. [2023-11-29 05:38:53,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 188 transitions. [2023-11-29 05:38:53,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:53,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 188 transitions. [2023-11-29 05:38:53,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.533333333333333) internal successors, (188), 15 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:53,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:53,003 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 29.0) internal successors, (464), 16 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:53,004 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1400 flow. Second operand 15 states and 188 transitions. [2023-11-29 05:38:53,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 212 transitions, 2417 flow [2023-11-29 05:38:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 212 transitions, 2206 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-29 05:38:53,046 INFO L231 Difference]: Finished difference. Result has 122 places, 89 transitions, 865 flow [2023-11-29 05:38:53,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=865, PETRI_PLACES=122, PETRI_TRANSITIONS=89} [2023-11-29 05:38:53,046 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2023-11-29 05:38:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 89 transitions, 865 flow [2023-11-29 05:38:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:53,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:53,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:53,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:38:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:38:53,247 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:53,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash -755228349, now seen corresponding path program 6 times [2023-11-29 05:38:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:53,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047512352] [2023-11-29 05:38:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:38:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047512352] [2023-11-29 05:38:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047512352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345206938] [2023-11-29 05:38:53,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:38:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:53,468 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:53,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:38:53,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:38:53,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:53,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:38:53,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:38:53,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:38:53,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345206938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:53,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:53,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 16 [2023-11-29 05:38:53,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619171148] [2023-11-29 05:38:53,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:53,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:38:53,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:38:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:38:53,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:53,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 89 transitions, 865 flow. Second operand has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:53,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:53,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:53,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:54,765 INFO L124 PetriNetUnfolderBase]: 2155/3979 cut-off events. [2023-11-29 05:38:54,766 INFO L125 PetriNetUnfolderBase]: For 19413/19419 co-relation queries the response was YES. [2023-11-29 05:38:54,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17060 conditions, 3979 events. 2155/3979 cut-off events. For 19413/19419 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25790 event pairs, 272 based on Foata normal form. 180/4157 useless extension candidates. Maximal degree in co-relation 17014. Up to 620 conditions per place. [2023-11-29 05:38:54,787 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 165 selfloop transitions, 83 changer transitions 0/251 dead transitions. [2023-11-29 05:38:54,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 251 transitions, 2597 flow [2023-11-29 05:38:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:38:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:38:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 267 transitions. [2023-11-29 05:38:54,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603448275862069 [2023-11-29 05:38:54,789 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 267 transitions. [2023-11-29 05:38:54,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 267 transitions. [2023-11-29 05:38:54,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:54,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 267 transitions. [2023-11-29 05:38:54,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.35) internal successors, (267), 20 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:54,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:54,791 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:54,791 INFO L175 Difference]: Start difference. First operand has 122 places, 89 transitions, 865 flow. Second operand 20 states and 267 transitions. [2023-11-29 05:38:54,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 251 transitions, 2597 flow [2023-11-29 05:38:54,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 251 transitions, 2338 flow, removed 118 selfloop flow, removed 12 redundant places. [2023-11-29 05:38:54,852 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 1523 flow [2023-11-29 05:38:54,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1523, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2023-11-29 05:38:54,853 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2023-11-29 05:38:54,853 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 1523 flow [2023-11-29 05:38:54,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 17 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:54,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:54,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:54,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:38:55,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:38:55,055 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:55,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2055922633, now seen corresponding path program 7 times [2023-11-29 05:38:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:55,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823813308] [2023-11-29 05:38:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:55,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:38:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823813308] [2023-11-29 05:38:55,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823813308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522305952] [2023-11-29 05:38:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:38:55,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:55,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:55,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:38:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:55,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:38:55,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:38:55,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:38:55,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522305952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:55,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:55,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-29 05:38:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159374153] [2023-11-29 05:38:55,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:55,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:38:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:38:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:38:55,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:55,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 1523 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:55,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:55,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:55,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:56,387 INFO L124 PetriNetUnfolderBase]: 2145/3942 cut-off events. [2023-11-29 05:38:56,387 INFO L125 PetriNetUnfolderBase]: For 26043/26049 co-relation queries the response was YES. [2023-11-29 05:38:56,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18592 conditions, 3942 events. 2145/3942 cut-off events. For 26043/26049 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25722 event pairs, 562 based on Foata normal form. 54/3994 useless extension candidates. Maximal degree in co-relation 18529. Up to 1892 conditions per place. [2023-11-29 05:38:56,409 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 145 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-11-29 05:38:56,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 2349 flow [2023-11-29 05:38:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:38:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:38:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2023-11-29 05:38:56,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2023-11-29 05:38:56,410 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 122 transitions. [2023-11-29 05:38:56,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 122 transitions. [2023-11-29 05:38:56,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:56,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 122 transitions. [2023-11-29 05:38:56,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:56,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:56,412 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:56,412 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 1523 flow. Second operand 11 states and 122 transitions. [2023-11-29 05:38:56,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 2349 flow [2023-11-29 05:38:56,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 2212 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-11-29 05:38:56,469 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 1448 flow [2023-11-29 05:38:56,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1448, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2023-11-29 05:38:56,470 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 98 predicate places. [2023-11-29 05:38:56,470 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 1448 flow [2023-11-29 05:38:56,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:56,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:56,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:56,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:38:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:38:56,671 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:56,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1043612258, now seen corresponding path program 1 times [2023-11-29 05:38:56,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:56,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508564363] [2023-11-29 05:38:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:56,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:38:57,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508564363] [2023-11-29 05:38:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508564363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874797661] [2023-11-29 05:38:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:57,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:57,069 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:57,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:38:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:57,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:38:57,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:57,386 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 05:38:57,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-29 05:38:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:38:57,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:57,493 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-29 05:38:57,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-29 05:38:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:38:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874797661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:57,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 05:38:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400077648] [2023-11-29 05:38:57,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:57,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:38:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:38:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:38:57,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:57,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 1448 flow. Second operand has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:57,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:57,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:57,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:58,633 INFO L124 PetriNetUnfolderBase]: 2420/4460 cut-off events. [2023-11-29 05:38:58,633 INFO L125 PetriNetUnfolderBase]: For 31963/31969 co-relation queries the response was YES. [2023-11-29 05:38:58,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21856 conditions, 4460 events. 2420/4460 cut-off events. For 31963/31969 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 29294 event pairs, 630 based on Foata normal form. 108/4566 useless extension candidates. Maximal degree in co-relation 21792. Up to 2486 conditions per place. [2023-11-29 05:38:58,657 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 192 selfloop transitions, 67 changer transitions 1/263 dead transitions. [2023-11-29 05:38:58,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 263 transitions, 3236 flow [2023-11-29 05:38:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:38:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:38:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 222 transitions. [2023-11-29 05:38:58,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47844827586206895 [2023-11-29 05:38:58,659 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 222 transitions. [2023-11-29 05:38:58,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 222 transitions. [2023-11-29 05:38:58,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:58,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 222 transitions. [2023-11-29 05:38:58,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.875) internal successors, (222), 16 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:58,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:58,661 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:58,661 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 1448 flow. Second operand 16 states and 222 transitions. [2023-11-29 05:38:58,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 263 transitions, 3236 flow [2023-11-29 05:38:58,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 263 transitions, 3197 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-29 05:38:58,723 INFO L231 Difference]: Finished difference. Result has 139 places, 153 transitions, 2003 flow [2023-11-29 05:38:58,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2003, PETRI_PLACES=139, PETRI_TRANSITIONS=153} [2023-11-29 05:38:58,724 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2023-11-29 05:38:58,724 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 153 transitions, 2003 flow [2023-11-29 05:38:58,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.0) internal successors, (160), 20 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:58,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:58,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:58,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:38:58,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:38:58,925 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:58,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash 453655312, now seen corresponding path program 1 times [2023-11-29 05:38:58,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:58,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389843250] [2023-11-29 05:38:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:58,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:38:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389843250] [2023-11-29 05:38:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389843250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261788759] [2023-11-29 05:38:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:59,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:59,416 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:59,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:38:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:59,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 05:38:59,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:59,791 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-29 05:38:59,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2023-11-29 05:38:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:59,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:59,908 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-29 05:38:59,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-29 05:38:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:38:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261788759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:59,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:59,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 22 [2023-11-29 05:38:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545574392] [2023-11-29 05:38:59,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:38:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:38:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:38:59,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:38:59,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 153 transitions, 2003 flow. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:59,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:59,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:38:59,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:01,205 INFO L124 PetriNetUnfolderBase]: 2456/4546 cut-off events. [2023-11-29 05:39:01,205 INFO L125 PetriNetUnfolderBase]: For 41642/41648 co-relation queries the response was YES. [2023-11-29 05:39:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24349 conditions, 4546 events. 2456/4546 cut-off events. For 41642/41648 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30193 event pairs, 932 based on Foata normal form. 16/4560 useless extension candidates. Maximal degree in co-relation 24279. Up to 3504 conditions per place. [2023-11-29 05:39:01,232 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 158 selfloop transitions, 37 changer transitions 38/236 dead transitions. [2023-11-29 05:39:01,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 236 transitions, 3017 flow [2023-11-29 05:39:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:39:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:39:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 202 transitions. [2023-11-29 05:39:01,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2023-11-29 05:39:01,234 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 202 transitions. [2023-11-29 05:39:01,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 202 transitions. [2023-11-29 05:39:01,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:01,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 202 transitions. [2023-11-29 05:39:01,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.625) internal successors, (202), 16 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:01,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:01,236 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:01,236 INFO L175 Difference]: Start difference. First operand has 139 places, 153 transitions, 2003 flow. Second operand 16 states and 202 transitions. [2023-11-29 05:39:01,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 236 transitions, 3017 flow [2023-11-29 05:39:01,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 236 transitions, 2906 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-29 05:39:01,321 INFO L231 Difference]: Finished difference. Result has 151 places, 147 transitions, 1902 flow [2023-11-29 05:39:01,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1902, PETRI_PLACES=151, PETRI_TRANSITIONS=147} [2023-11-29 05:39:01,321 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 124 predicate places. [2023-11-29 05:39:01,322 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 147 transitions, 1902 flow [2023-11-29 05:39:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:01,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:01,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:39:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:39:01,522 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:39:01,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1559050236, now seen corresponding path program 2 times [2023-11-29 05:39:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743347337] [2023-11-29 05:39:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:01,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:01,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743347337] [2023-11-29 05:39:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743347337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:01,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139586189] [2023-11-29 05:39:01,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:01,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:01,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:01,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:01,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:39:02,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:39:02,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:02,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:39:02,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:02,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:02,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-29 05:39:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:02,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:02,340 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-29 05:39:02,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-29 05:39:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:02,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139586189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:02,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:02,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 05:39:02,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426664509] [2023-11-29 05:39:02,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:02,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:39:02,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:02,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:39:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:39:02,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:39:02,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 147 transitions, 1902 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:02,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:02,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:39:02,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:03,627 INFO L124 PetriNetUnfolderBase]: 2538/4681 cut-off events. [2023-11-29 05:39:03,628 INFO L125 PetriNetUnfolderBase]: For 50583/50583 co-relation queries the response was YES. [2023-11-29 05:39:03,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26006 conditions, 4681 events. 2538/4681 cut-off events. For 50583/50583 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 31400 event pairs, 869 based on Foata normal form. 24/4704 useless extension candidates. Maximal degree in co-relation 25932. Up to 3496 conditions per place. [2023-11-29 05:39:03,656 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 181 selfloop transitions, 58 changer transitions 2/244 dead transitions. [2023-11-29 05:39:03,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 244 transitions, 3274 flow [2023-11-29 05:39:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:39:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:39:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 208 transitions. [2023-11-29 05:39:03,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2023-11-29 05:39:03,657 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 208 transitions. [2023-11-29 05:39:03,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 208 transitions. [2023-11-29 05:39:03,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:03,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 208 transitions. [2023-11-29 05:39:03,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.0) internal successors, (208), 16 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:03,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:03,659 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:03,659 INFO L175 Difference]: Start difference. First operand has 151 places, 147 transitions, 1902 flow. Second operand 16 states and 208 transitions. [2023-11-29 05:39:03,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 244 transitions, 3274 flow [2023-11-29 05:39:03,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 244 transitions, 3110 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-11-29 05:39:03,764 INFO L231 Difference]: Finished difference. Result has 152 places, 167 transitions, 2297 flow [2023-11-29 05:39:03,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2297, PETRI_PLACES=152, PETRI_TRANSITIONS=167} [2023-11-29 05:39:03,765 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 125 predicate places. [2023-11-29 05:39:03,765 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 167 transitions, 2297 flow [2023-11-29 05:39:03,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:03,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:03,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:03,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:39:03,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:39:03,966 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:39:03,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash 23168004, now seen corresponding path program 2 times [2023-11-29 05:39:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:03,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838487268] [2023-11-29 05:39:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:03,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838487268] [2023-11-29 05:39:04,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838487268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869621568] [2023-11-29 05:39:04,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:04,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:04,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:04,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:39:04,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:39:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:04,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:39:04,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:04,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:04,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-29 05:39:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:04,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:04,822 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-29 05:39:04,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-29 05:39:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:04,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869621568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:04,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:04,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 05:39:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128983760] [2023-11-29 05:39:04,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:04,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:39:04,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:39:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:39:04,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:39:04,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 167 transitions, 2297 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:04,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:04,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:39:04,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:06,346 INFO L124 PetriNetUnfolderBase]: 2894/5354 cut-off events. [2023-11-29 05:39:06,346 INFO L125 PetriNetUnfolderBase]: For 63566/63566 co-relation queries the response was YES. [2023-11-29 05:39:06,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30744 conditions, 5354 events. 2894/5354 cut-off events. For 63566/63566 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 36716 event pairs, 931 based on Foata normal form. 12/5365 useless extension candidates. Maximal degree in co-relation 30670. Up to 3782 conditions per place. [2023-11-29 05:39:06,379 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 204 selfloop transitions, 96 changer transitions 10/313 dead transitions. [2023-11-29 05:39:06,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 313 transitions, 4337 flow [2023-11-29 05:39:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:39:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 05:39:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 293 transitions. [2023-11-29 05:39:06,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40413793103448276 [2023-11-29 05:39:06,380 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 293 transitions. [2023-11-29 05:39:06,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 293 transitions. [2023-11-29 05:39:06,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:06,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 293 transitions. [2023-11-29 05:39:06,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 11.72) internal successors, (293), 25 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:06,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:06,382 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:06,382 INFO L175 Difference]: Start difference. First operand has 152 places, 167 transitions, 2297 flow. Second operand 25 states and 293 transitions. [2023-11-29 05:39:06,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 313 transitions, 4337 flow [2023-11-29 05:39:06,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 313 transitions, 4128 flow, removed 67 selfloop flow, removed 9 redundant places. [2023-11-29 05:39:06,534 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 3131 flow [2023-11-29 05:39:06,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3131, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2023-11-29 05:39:06,535 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 146 predicate places. [2023-11-29 05:39:06,535 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 3131 flow [2023-11-29 05:39:06,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:06,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:06,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:06,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:39:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:06,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:39:06,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1421020000, now seen corresponding path program 3 times [2023-11-29 05:39:06,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:06,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328628857] [2023-11-29 05:39:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:07,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:07,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328628857] [2023-11-29 05:39:07,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328628857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:07,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578263480] [2023-11-29 05:39:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:39:07,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:07,198 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:07,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:39:07,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:39:07,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:07,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 05:39:07,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:07,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:39:07,842 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:39:07,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:39:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:39:07,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:08,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:08,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-29 05:39:08,209 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:39:08,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-29 05:39:08,274 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 05:39:08,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-29 05:39:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:39:08,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578263480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:08,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:08,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 26 [2023-11-29 05:39:08,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528233769] [2023-11-29 05:39:08,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:39:08,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:08,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:39:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:39:08,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:39:08,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 3131 flow. Second operand has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:08,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:08,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:39:08,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:10,279 INFO L124 PetriNetUnfolderBase]: 2898/5392 cut-off events. [2023-11-29 05:39:10,279 INFO L125 PetriNetUnfolderBase]: For 71687/71687 co-relation queries the response was YES. [2023-11-29 05:39:10,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32287 conditions, 5392 events. 2898/5392 cut-off events. For 71687/71687 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37429 event pairs, 1147 based on Foata normal form. 18/5409 useless extension candidates. Maximal degree in co-relation 32206. Up to 4871 conditions per place. [2023-11-29 05:39:10,317 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 217 selfloop transitions, 53 changer transitions 20/293 dead transitions. [2023-11-29 05:39:10,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 293 transitions, 4393 flow [2023-11-29 05:39:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:39:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:39:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 239 transitions. [2023-11-29 05:39:10,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924466338259442 [2023-11-29 05:39:10,319 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 239 transitions. [2023-11-29 05:39:10,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 239 transitions. [2023-11-29 05:39:10,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:10,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 239 transitions. [2023-11-29 05:39:10,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.380952380952381) internal successors, (239), 21 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,322 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,322 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 3131 flow. Second operand 21 states and 239 transitions. [2023-11-29 05:39:10,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 293 transitions, 4393 flow [2023-11-29 05:39:10,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 293 transitions, 4020 flow, removed 137 selfloop flow, removed 15 redundant places. [2023-11-29 05:39:10,548 INFO L231 Difference]: Finished difference. Result has 183 places, 215 transitions, 3143 flow [2023-11-29 05:39:10,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3143, PETRI_PLACES=183, PETRI_TRANSITIONS=215} [2023-11-29 05:39:10,548 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 156 predicate places. [2023-11-29 05:39:10,548 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 215 transitions, 3143 flow [2023-11-29 05:39:10,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:10,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:10,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:39:10,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:39:10,749 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:39:10,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2086874064, now seen corresponding path program 4 times [2023-11-29 05:39:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560912417] [2023-11-29 05:39:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:11,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560912417] [2023-11-29 05:39:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560912417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904021244] [2023-11-29 05:39:11,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:39:11,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:11,047 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:11,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:39:11,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:39:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:11,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:39:11,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:11,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:39:11,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:11,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2023-11-29 05:39:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:39:11,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:11,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:11,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-29 05:39:11,662 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:39:11,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-29 05:39:11,716 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 05:39:11,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-29 05:39:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:39:12,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904021244] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:12,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:12,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2023-11-29 05:39:12,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573766812] [2023-11-29 05:39:12,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:12,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:39:12,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:39:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:39:12,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:39:12,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 215 transitions, 3143 flow. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:12,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:12,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:39:12,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:13,870 INFO L124 PetriNetUnfolderBase]: 2840/5274 cut-off events. [2023-11-29 05:39:13,870 INFO L125 PetriNetUnfolderBase]: For 62489/62489 co-relation queries the response was YES. [2023-11-29 05:39:13,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30554 conditions, 5274 events. 2840/5274 cut-off events. For 62489/62489 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 36352 event pairs, 1113 based on Foata normal form. 18/5291 useless extension candidates. Maximal degree in co-relation 30467. Up to 4733 conditions per place. [2023-11-29 05:39:13,907 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 215 selfloop transitions, 59 changer transitions 12/289 dead transitions. [2023-11-29 05:39:13,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 289 transitions, 4210 flow [2023-11-29 05:39:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:39:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:39:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 248 transitions. [2023-11-29 05:39:13,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37181409295352325 [2023-11-29 05:39:13,909 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 248 transitions. [2023-11-29 05:39:13,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 248 transitions. [2023-11-29 05:39:13,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:13,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 248 transitions. [2023-11-29 05:39:13,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.782608695652174) internal successors, (248), 23 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:13,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:13,912 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 29.0) internal successors, (696), 24 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:13,912 INFO L175 Difference]: Start difference. First operand has 183 places, 215 transitions, 3143 flow. Second operand 23 states and 248 transitions. [2023-11-29 05:39:13,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 289 transitions, 4210 flow [2023-11-29 05:39:14,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 289 transitions, 4136 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-11-29 05:39:14,109 INFO L231 Difference]: Finished difference. Result has 192 places, 217 transitions, 3247 flow [2023-11-29 05:39:14,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3247, PETRI_PLACES=192, PETRI_TRANSITIONS=217} [2023-11-29 05:39:14,110 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 165 predicate places. [2023-11-29 05:39:14,110 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 217 transitions, 3247 flow [2023-11-29 05:39:14,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:14,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:14,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:14,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:39:14,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:14,311 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:39:14,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash -487727038, now seen corresponding path program 3 times [2023-11-29 05:39:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744724339] [2023-11-29 05:39:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:14,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744724339] [2023-11-29 05:39:14,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744724339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29962669] [2023-11-29 05:39:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:39:14,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:14,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:14,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:39:14,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:39:14,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:14,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 05:39:14,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:14,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:39:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:39:14,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:39:14,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:39:14,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:39:14,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:39:14,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:39:14,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:39:14,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:39:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:39:14,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:39:15,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:39:15,061 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:39:15,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:39:15,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:39:15,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:39:15,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 05:39:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:15,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:15,904 INFO L349 Elim1Store]: treesize reduction 41, result has 52.3 percent of original size [2023-11-29 05:39:15,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 128 [2023-11-29 05:39:16,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:16,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-11-29 05:39:16,945 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:39:16,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 61 [2023-11-29 05:39:16,950 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:39:16,982 INFO L349 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2023-11-29 05:39:16,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 72 [2023-11-29 05:39:17,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:17,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-11-29 05:39:17,048 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:39:17,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 72 [2023-11-29 05:39:17,053 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:39:17,086 INFO L349 Elim1Store]: treesize reduction 10, result has 82.8 percent of original size [2023-11-29 05:39:17,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 81 [2023-11-29 05:39:17,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:17,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 69 [2023-11-29 05:39:17,191 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:39:17,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 97 [2023-11-29 05:39:17,197 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:39:17,198 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:39:17,250 INFO L349 Elim1Store]: treesize reduction 10, result has 88.9 percent of original size [2023-11-29 05:39:17,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 92 treesize of output 128 [2023-11-29 05:39:18,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:18,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 62 [2023-11-29 05:39:18,316 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:39:18,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 84 [2023-11-29 05:39:18,322 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:39:18,356 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-11-29 05:39:18,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 89 [2023-11-29 05:39:18,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:39:18,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2023-11-29 05:39:18,573 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:39:18,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 59 [2023-11-29 05:39:18,579 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:39:18,612 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-11-29 05:39:18,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 74 [2023-11-29 05:39:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:20,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29962669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:20,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:20,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2023-11-29 05:39:20,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30560423] [2023-11-29 05:39:20,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:20,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:39:20,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:20,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:39:20,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=802, Unknown=6, NotChecked=0, Total=930 [2023-11-29 05:39:20,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:39:20,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 217 transitions, 3247 flow. Second operand has 31 states, 31 states have (on average 6.903225806451613) internal successors, (214), 31 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:20,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:20,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:39:20,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:29,399 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse12 (select |c_#memory_int#3| c_~B~0.base)) (.cse10 (select |c_#memory_int#3| c_~A~0.base)) (.cse1 (+ c_~i_BA~0 1)) (.cse11 (* c_~i_AB~0 4)) (.cse21 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|))) (let ((.cse0 (= c_~i_AB~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse5 (+ .cse21 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ c_~A~0.offset 4 .cse11)) (.cse13 (forall ((v_~i_BA~0_84 Int)) (or (let ((.cse49 (* 4 v_~i_BA~0_84))) (= (select .cse12 (+ .cse49 c_~B~0.offset)) (select .cse10 (+ c_~A~0.offset .cse49)))) (< v_~i_BA~0_84 .cse1) (< c_~An~0 (+ 1 v_~i_BA~0_84))))) (.cse22 (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|))) (and (or (not .cse0) (and (forall ((v_~i_BA~0_84 Int)) (or (< v_~i_BA~0_84 .cse1) (forall ((v_arrayElimArr_1 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int#3| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (let ((.cse2 (* 4 v_~i_BA~0_84))) (= (select v_arrayElimArr_1 (+ .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse3 (+ c_~A~0.offset .cse2)))) (not (= (select .cse3 .cse4) (select v_arrayElimArr_1 .cse5)))))) (< c_~An~0 (+ 1 v_~i_BA~0_84)))) (forall ((v_~i_BA~0_84 Int)) (or (< v_~i_BA~0_84 .cse1) (< c_~An~0 (+ 1 v_~i_BA~0_84)) (forall ((v_arrayElimArr_1 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int#3| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base)) (.cse6 (* 4 v_~i_BA~0_84))) (let ((.cse7 (select .cse9 (+ c_~A~0.offset .cse6))) (.cse8 (select v_arrayElimArr_1 .cse5))) (or (= (select v_arrayElimArr_1 (+ .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse7) (= .cse8 .cse7) (not (= (select .cse9 .cse4) .cse8)))))))))) (or (not (= (select .cse10 (+ c_~A~0.offset .cse11)) (select .cse12 (+ c_~B~0.offset .cse11)))) .cse13) (or .cse0 (let ((.cse16 (+ 4 .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_~i_BA~0_84 Int)) (or (< v_~i_BA~0_84 .cse1) (< c_~An~0 (+ 1 v_~i_BA~0_84)) (forall ((v_arrayElimArr_1 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int#3| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base)) (.cse14 (* 4 v_~i_BA~0_84))) (let ((.cse15 (select .cse17 (+ c_~A~0.offset .cse14)))) (or (= (select v_arrayElimArr_1 (+ .cse14 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse15) (not (= (select v_arrayElimArr_1 .cse16) (select .cse17 .cse4))) (= (select v_arrayElimArr_1 .cse5) .cse15))))))) (forall ((v_~i_BA~0_84 Int)) (or (< v_~i_BA~0_84 .cse1) (< c_~An~0 (+ 1 v_~i_BA~0_84)) (forall ((v_arrayElimArr_1 (Array Int Int))) (let ((.cse19 (select (store |c_#memory_int#3| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (let ((.cse18 (* 4 v_~i_BA~0_84))) (= (select v_arrayElimArr_1 (+ .cse18 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse19 (+ c_~A~0.offset .cse18)))) (not (= (select v_arrayElimArr_1 .cse16) (select .cse19 .cse4)))))) (= (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) v_~i_BA~0_84))) (or (forall ((v_arrayElimArr_1 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int#3| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (= (select v_arrayElimArr_1 .cse5) (select .cse20 (+ c_~A~0.offset .cse21 4))) (not (= (select v_arrayElimArr_1 .cse16) (select .cse20 .cse4)))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| c_~i_BA~0) (< c_~An~0 .cse22))))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem2| |c_thread1Thread1of1ForFork1_#t~mem1|)) .cse13) (or (not (= (select .cse12 (+ 4 c_~B~0.offset .cse11)) (select .cse10 .cse4))) .cse13) (or (let ((.cse26 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_155| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_155|) 0)))) (.cse41 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_155| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_155|) 0)) (= |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_155| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))) (.cse44 (+ (* c_~i_BA~0 4) 1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse45 (+ (* c_~An~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse47 (= c_~i_AB~0 0)) (.cse27 (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 5)) (.cse25 (< .cse45 9)) (.cse34 (< 0 .cse44)) (.cse40 (< 0 (+ 5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (.cse32 (and (or .cse26 (= 0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse41)) (.cse43 (< c_~An~0 3)) (.cse42 (< 0 .cse1)) (.cse24 (< c_~An~0 (+ c_~i_BA~0 2)))) (and (or (let ((.cse46 (* (- 1) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse35 (div .cse46 4)) (.cse31 (div (+ 3 .cse46) 4)) (.cse39 (+ .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse23 (< .cse39 5)) (.cse37 (< 0 (+ 5 .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (.cse30 (* 4 .cse31)) (.cse28 (< c_~i_AB~0 .cse1)) (.cse29 (< .cse45 (+ 9 .cse11))) (.cse33 (< .cse11 .cse44)) (.cse36 (< c_~An~0 (+ c_~i_AB~0 3))) (.cse38 (* .cse35 4))) (and (or .cse23 .cse24 .cse25 .cse26 .cse27 .cse28 .cse29) (or (< (+ .cse30 .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 5) .cse23 .cse24 (< (+ c_~i_AB~0 .cse31) .cse1) .cse25 .cse28 .cse32) (or .cse33 .cse34 .cse24 .cse28 .cse32) (or (< c_~An~0 (+ c_~i_AB~0 .cse35 3)) .cse36 .cse34 .cse24 .cse37 (< 0 (+ .cse38 5 .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse32) (or (< c_~An~0 2) (< 0 c_~i_BA~0) .cse32) (or (= .cse39 0) (and (or .cse34 .cse24 .cse28) (or .cse23 .cse24 .cse25 .cse28) (or .cse36 .cse34 .cse24 .cse37) (or .cse36 .cse24 .cse25)) .cse32) (or (and (or .cse33 .cse36 .cse24 .cse40) (or .cse36 .cse24 .cse29) (or .cse33 .cse24 .cse28) (or .cse24 .cse27 .cse28 .cse29)) .cse41) (or .cse33 .cse36 .cse34 .cse24 .cse37 .cse26 .cse40) (or (and (or .cse42 .cse36 (< 0 (+ c_~i_AB~0 2)) .cse24) (or .cse24 .cse43 .cse28 (< c_~i_AB~0 2)) (or .cse42 .cse24 .cse28) (or .cse36 .cse24 .cse43)) .cse32) (or .cse24 (< .cse31 .cse1) .cse26 .cse27 (< (+ .cse30 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ 5 .cse11)) .cse28 .cse29) (or (and (or .cse36 .cse24) (or .cse24 .cse28)) .cse41) (or .cse36 .cse24 .cse25 .cse32 .cse29) (or .cse33 .cse36 .cse24 .cse26 (< c_~An~0 (+ .cse35 3)) (< .cse11 (+ .cse38 5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse40))))) .cse47) (or (not .cse47) (let ((.cse48 (and (or .cse24 .cse43) (or .cse42 .cse24)))) (and (or .cse42 .cse24 .cse25 .cse26 .cse27) (or .cse42 .cse34 .cse24 .cse32) (or .cse48 .cse41) (or .cse24 .cse43 .cse25 .cse32) (or .cse34 .cse24 .cse43 .cse26 .cse40) (or .cse48 .cse32))))))) (< .cse22 |c_ULTIMATE.start_create_fresh_int_array_~size#1|))))) is different from false [2023-11-29 05:39:33,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:39:39,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:39:46,357 INFO L124 PetriNetUnfolderBase]: 10550/19467 cut-off events. [2023-11-29 05:39:46,358 INFO L125 PetriNetUnfolderBase]: For 268801/268801 co-relation queries the response was YES. [2023-11-29 05:39:46,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113445 conditions, 19467 events. 10550/19467 cut-off events. For 268801/268801 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 167485 event pairs, 2232 based on Foata normal form. 300/19766 useless extension candidates. Maximal degree in co-relation 111889. Up to 5449 conditions per place. [2023-11-29 05:39:46,517 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 736 selfloop transitions, 583 changer transitions 3/1325 dead transitions. [2023-11-29 05:39:46,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1325 transitions, 20346 flow [2023-11-29 05:39:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 05:39:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-29 05:39:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 963 transitions. [2023-11-29 05:39:46,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125839677563815 [2023-11-29 05:39:46,520 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 963 transitions. [2023-11-29 05:39:46,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 963 transitions. [2023-11-29 05:39:46,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:46,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 963 transitions. [2023-11-29 05:39:46,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 12.506493506493506) internal successors, (963), 77 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:46,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 29.0) internal successors, (2262), 78 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:46,527 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 29.0) internal successors, (2262), 78 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:46,527 INFO L175 Difference]: Start difference. First operand has 192 places, 217 transitions, 3247 flow. Second operand 77 states and 963 transitions. [2023-11-29 05:39:46,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1325 transitions, 20346 flow [2023-11-29 05:39:47,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1325 transitions, 19908 flow, removed 123 selfloop flow, removed 15 redundant places. [2023-11-29 05:39:47,830 INFO L231 Difference]: Finished difference. Result has 290 places, 849 transitions, 15806 flow [2023-11-29 05:39:47,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=15806, PETRI_PLACES=290, PETRI_TRANSITIONS=849} [2023-11-29 05:39:47,831 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 263 predicate places. [2023-11-29 05:39:47,831 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 849 transitions, 15806 flow [2023-11-29 05:39:47,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.903225806451613) internal successors, (214), 31 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:47,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:47,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:47,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:39:48,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:48,032 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:39:48,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 274050970, now seen corresponding path program 4 times [2023-11-29 05:39:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:48,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358875443] [2023-11-29 05:39:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:48,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:48,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358875443] [2023-11-29 05:39:48,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358875443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707152891] [2023-11-29 05:39:48,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:39:48,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:48,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:48,456 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:48,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:39:48,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:39:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:48,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:39:48,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:48,707 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 05:39:48,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-11-29 05:39:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:48,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:48,827 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-29 05:39:48,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-29 05:39:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:39:48,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707152891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:48,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:48,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2023-11-29 05:39:48,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698727535] [2023-11-29 05:39:48,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:48,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:39:48,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:48,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:39:48,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:39:48,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:39:48,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 849 transitions, 15806 flow. Second operand has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:48,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:48,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:39:48,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:56,624 INFO L124 PetriNetUnfolderBase]: 10513/19290 cut-off events. [2023-11-29 05:39:56,624 INFO L125 PetriNetUnfolderBase]: For 702073/702073 co-relation queries the response was YES. [2023-11-29 05:39:56,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147921 conditions, 19290 events. 10513/19290 cut-off events. For 702073/702073 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 164218 event pairs, 2714 based on Foata normal form. 415/19703 useless extension candidates. Maximal degree in co-relation 146858. Up to 13073 conditions per place. [2023-11-29 05:39:56,844 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 726 selfloop transitions, 382 changer transitions 14/1125 dead transitions. [2023-11-29 05:39:56,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1125 transitions, 21787 flow [2023-11-29 05:39:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:39:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 05:39:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 429 transitions. [2023-11-29 05:39:56,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509127789046653 [2023-11-29 05:39:56,846 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 429 transitions. [2023-11-29 05:39:56,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 429 transitions. [2023-11-29 05:39:56,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:56,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 429 transitions. [2023-11-29 05:39:56,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 12.617647058823529) internal successors, (429), 34 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:56,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 29.0) internal successors, (1015), 35 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:56,850 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 29.0) internal successors, (1015), 35 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:56,850 INFO L175 Difference]: Start difference. First operand has 290 places, 849 transitions, 15806 flow. Second operand 34 states and 429 transitions. [2023-11-29 05:39:56,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1125 transitions, 21787 flow [2023-11-29 05:40:01,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1125 transitions, 20197 flow, removed 730 selfloop flow, removed 12 redundant places. [2023-11-29 05:40:01,173 INFO L231 Difference]: Finished difference. Result has 319 places, 907 transitions, 16590 flow [2023-11-29 05:40:01,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14390, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16590, PETRI_PLACES=319, PETRI_TRANSITIONS=907} [2023-11-29 05:40:01,174 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 292 predicate places. [2023-11-29 05:40:01,174 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 907 transitions, 16590 flow [2023-11-29 05:40:01,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.157894736842104) internal successors, (155), 19 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:01,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:01,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:01,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:40:01,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:01,375 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:40:01,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1127632314, now seen corresponding path program 5 times [2023-11-29 05:40:01,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:01,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022846535] [2023-11-29 05:40:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:01,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022846535] [2023-11-29 05:40:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022846535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836169632] [2023-11-29 05:40:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:40:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:01,783 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:01,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:40:01,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:40:01,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:01,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 05:40:01,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:02,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:40:02,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-29 05:40:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:02,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:02,138 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:40:02,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:40:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:02,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836169632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:02,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:02,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-11-29 05:40:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451777635] [2023-11-29 05:40:02,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:02,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:40:02,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:40:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:40:02,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:40:02,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 907 transitions, 16590 flow. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:02,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:02,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:40:02,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:10,754 INFO L124 PetriNetUnfolderBase]: 11223/20642 cut-off events. [2023-11-29 05:40:10,754 INFO L125 PetriNetUnfolderBase]: For 858259/858262 co-relation queries the response was YES. [2023-11-29 05:40:11,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161828 conditions, 20642 events. 11223/20642 cut-off events. For 858259/858262 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 178680 event pairs, 3327 based on Foata normal form. 42/20680 useless extension candidates. Maximal degree in co-relation 161692. Up to 15857 conditions per place. [2023-11-29 05:40:11,101 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 756 selfloop transitions, 319 changer transitions 26/1104 dead transitions. [2023-11-29 05:40:11,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1104 transitions, 21763 flow [2023-11-29 05:40:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:40:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:40:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 244 transitions. [2023-11-29 05:40:11,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206896551724138 [2023-11-29 05:40:11,102 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 244 transitions. [2023-11-29 05:40:11,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 244 transitions. [2023-11-29 05:40:11,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:11,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 244 transitions. [2023-11-29 05:40:11,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.2) internal successors, (244), 20 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:11,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:11,103 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 29.0) internal successors, (609), 21 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:11,104 INFO L175 Difference]: Start difference. First operand has 319 places, 907 transitions, 16590 flow. Second operand 20 states and 244 transitions. [2023-11-29 05:40:11,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1104 transitions, 21763 flow [2023-11-29 05:40:16,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1104 transitions, 20804 flow, removed 169 selfloop flow, removed 18 redundant places. [2023-11-29 05:40:16,570 INFO L231 Difference]: Finished difference. Result has 326 places, 1017 transitions, 19106 flow [2023-11-29 05:40:16,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15633, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=19106, PETRI_PLACES=326, PETRI_TRANSITIONS=1017} [2023-11-29 05:40:16,571 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 299 predicate places. [2023-11-29 05:40:16,571 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1017 transitions, 19106 flow [2023-11-29 05:40:16,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:16,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:16,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:16,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:40:16,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 05:40:16,772 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:40:16,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 649670272, now seen corresponding path program 5 times [2023-11-29 05:40:16,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114094512] [2023-11-29 05:40:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:16,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:17,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114094512] [2023-11-29 05:40:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114094512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251024707] [2023-11-29 05:40:17,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:40:17,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:17,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:17,030 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:17,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:40:17,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:40:17,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:17,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 05:40:17,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:17,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:40:17,373 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:40:17,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:40:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:17,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:17,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:40:17,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-29 05:40:17,595 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:40:17,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-29 05:40:17,678 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 05:40:17,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 203 [2023-11-29 05:40:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:40:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251024707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:17,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 21 [2023-11-29 05:40:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480884162] [2023-11-29 05:40:17,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:17,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:40:17,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:40:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:40:17,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:40:17,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1017 transitions, 19106 flow. Second operand has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 22 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:17,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:17,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:40:17,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:26,958 INFO L124 PetriNetUnfolderBase]: 11295/20781 cut-off events. [2023-11-29 05:40:26,958 INFO L125 PetriNetUnfolderBase]: For 800438/800441 co-relation queries the response was YES. [2023-11-29 05:40:27,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162488 conditions, 20781 events. 11295/20781 cut-off events. For 800438/800441 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 180335 event pairs, 3711 based on Foata normal form. 24/20801 useless extension candidates. Maximal degree in co-relation 162347. Up to 18978 conditions per place. [2023-11-29 05:40:27,211 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 901 selfloop transitions, 177 changer transitions 26/1107 dead transitions. [2023-11-29 05:40:27,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1107 transitions, 22543 flow [2023-11-29 05:40:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:40:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:40:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 195 transitions. [2023-11-29 05:40:27,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39553752535496955 [2023-11-29 05:40:27,212 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 195 transitions. [2023-11-29 05:40:27,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 195 transitions. [2023-11-29 05:40:27,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:27,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 195 transitions. [2023-11-29 05:40:27,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.470588235294118) internal successors, (195), 17 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:27,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:27,214 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:27,214 INFO L175 Difference]: Start difference. First operand has 326 places, 1017 transitions, 19106 flow. Second operand 17 states and 195 transitions. [2023-11-29 05:40:27,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1107 transitions, 22543 flow [2023-11-29 05:40:33,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1107 transitions, 21574 flow, removed 374 selfloop flow, removed 11 redundant places. [2023-11-29 05:40:33,525 INFO L231 Difference]: Finished difference. Result has 333 places, 1034 transitions, 19240 flow [2023-11-29 05:40:33,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18323, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19240, PETRI_PLACES=333, PETRI_TRANSITIONS=1034} [2023-11-29 05:40:33,526 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 306 predicate places. [2023-11-29 05:40:33,526 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1034 transitions, 19240 flow [2023-11-29 05:40:33,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 22 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:33,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:33,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:33,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:40:33,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:33,727 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:40:33,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:33,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2030239526, now seen corresponding path program 6 times [2023-11-29 05:40:33,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:33,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864299159] [2023-11-29 05:40:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:33,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:34,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864299159] [2023-11-29 05:40:34,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864299159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498395132] [2023-11-29 05:40:34,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:40:34,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:34,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:34,128 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:34,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:40:34,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:40:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:34,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:40:34,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:34,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:40:34,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-29 05:40:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:34,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:34,557 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:40:34,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:40:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498395132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:34,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:34,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2023-11-29 05:40:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237571211] [2023-11-29 05:40:34,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:40:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:40:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:40:34,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:40:34,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1034 transitions, 19240 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:34,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:34,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:40:34,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:43,293 INFO L124 PetriNetUnfolderBase]: 11264/20708 cut-off events. [2023-11-29 05:40:43,293 INFO L125 PetriNetUnfolderBase]: For 632648/632651 co-relation queries the response was YES. [2023-11-29 05:40:43,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155054 conditions, 20708 events. 11264/20708 cut-off events. For 632648/632651 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 178966 event pairs, 3282 based on Foata normal form. 131/20835 useless extension candidates. Maximal degree in co-relation 154909. Up to 15882 conditions per place. [2023-11-29 05:40:43,681 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 778 selfloop transitions, 350 changer transitions 2/1133 dead transitions. [2023-11-29 05:40:43,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1133 transitions, 22598 flow [2023-11-29 05:40:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:40:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 05:40:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 229 transitions. [2023-11-29 05:40:43,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41560798548094374 [2023-11-29 05:40:43,683 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 229 transitions. [2023-11-29 05:40:43,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 229 transitions. [2023-11-29 05:40:43,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:43,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 229 transitions. [2023-11-29 05:40:43,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.052631578947368) internal successors, (229), 19 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:43,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:43,685 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:43,685 INFO L175 Difference]: Start difference. First operand has 333 places, 1034 transitions, 19240 flow. Second operand 19 states and 229 transitions. [2023-11-29 05:40:43,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1133 transitions, 22598 flow [2023-11-29 05:40:49,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1133 transitions, 22382 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-11-29 05:40:49,597 INFO L231 Difference]: Finished difference. Result has 339 places, 1048 transitions, 20182 flow [2023-11-29 05:40:49,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18986, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20182, PETRI_PLACES=339, PETRI_TRANSITIONS=1048} [2023-11-29 05:40:49,598 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 312 predicate places. [2023-11-29 05:40:49,598 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1048 transitions, 20182 flow [2023-11-29 05:40:49,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:49,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:49,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:49,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:40:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:49,799 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:40:49,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1832745144, now seen corresponding path program 6 times [2023-11-29 05:40:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:49,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505265553] [2023-11-29 05:40:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:40:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505265553] [2023-11-29 05:40:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505265553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261099126] [2023-11-29 05:40:50,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:40:50,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:50,062 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:50,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:40:50,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 05:40:50,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:50,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 05:40:50,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:50,555 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-11-29 05:40:50,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 45 [2023-11-29 05:40:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:50,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:51,000 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:40:51,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:40:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:40:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261099126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:51,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:51,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 13] total 34 [2023-11-29 05:40:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572570041] [2023-11-29 05:40:51,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:51,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 05:40:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:51,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 05:40:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:40:51,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:40:51,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1048 transitions, 20182 flow. Second operand has 35 states, 35 states have (on average 7.142857142857143) internal successors, (250), 35 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:51,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:51,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:40:51,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:16,479 INFO L124 PetriNetUnfolderBase]: 27213/49944 cut-off events. [2023-11-29 05:41:16,479 INFO L125 PetriNetUnfolderBase]: For 1707289/1707289 co-relation queries the response was YES. [2023-11-29 05:41:17,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382703 conditions, 49944 events. 27213/49944 cut-off events. For 1707289/1707289 co-relation queries the response was YES. Maximal size of possible extension queue 2545. Compared 488773 event pairs, 4141 based on Foata normal form. 244/50186 useless extension candidates. Maximal degree in co-relation 382559. Up to 18987 conditions per place. [2023-11-29 05:41:17,304 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 1210 selfloop transitions, 1903 changer transitions 13/3129 dead transitions. [2023-11-29 05:41:17,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 3129 transitions, 63305 flow [2023-11-29 05:41:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 05:41:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-11-29 05:41:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 749 transitions. [2023-11-29 05:41:17,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39734748010610077 [2023-11-29 05:41:17,306 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 749 transitions. [2023-11-29 05:41:17,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 749 transitions. [2023-11-29 05:41:17,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:17,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 749 transitions. [2023-11-29 05:41:17,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 11.523076923076923) internal successors, (749), 65 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:17,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 29.0) internal successors, (1914), 66 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:17,312 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 29.0) internal successors, (1914), 66 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:17,312 INFO L175 Difference]: Start difference. First operand has 339 places, 1048 transitions, 20182 flow. Second operand 65 states and 749 transitions. [2023-11-29 05:41:17,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 3129 transitions, 63305 flow [2023-11-29 05:41:42,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 3129 transitions, 61774 flow, removed 66 selfloop flow, removed 15 redundant places. [2023-11-29 05:41:42,099 INFO L231 Difference]: Finished difference. Result has 423 places, 2699 transitions, 58832 flow [2023-11-29 05:41:42,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19484, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=58832, PETRI_PLACES=423, PETRI_TRANSITIONS=2699} [2023-11-29 05:41:42,101 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 396 predicate places. [2023-11-29 05:41:42,101 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 2699 transitions, 58832 flow [2023-11-29 05:41:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.142857142857143) internal successors, (250), 35 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:42,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:42,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:42,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:41:42,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 05:41:42,302 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:41:42,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash -620856524, now seen corresponding path program 7 times [2023-11-29 05:41:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317784724] [2023-11-29 05:41:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:41:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317784724] [2023-11-29 05:41:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317784724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:42,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228369785] [2023-11-29 05:41:42,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:41:42,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:42,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:42,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:42,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:41:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:42,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:41:42,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:42,877 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 05:41:42,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-29 05:41:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:41:42,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:42,944 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:41:42,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:41:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:41:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228369785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:42,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 19 [2023-11-29 05:41:42,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847182809] [2023-11-29 05:41:42,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:42,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:41:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:41:42,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:41:42,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:41:42,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 2699 transitions, 58832 flow. Second operand has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:42,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:42,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:41:42,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:28,256 INFO L124 PetriNetUnfolderBase]: 28824/52916 cut-off events. [2023-11-29 05:42:28,257 INFO L125 PetriNetUnfolderBase]: For 2666540/2666543 co-relation queries the response was YES. [2023-11-29 05:42:29,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465935 conditions, 52916 events. 28824/52916 cut-off events. For 2666540/2666543 co-relation queries the response was YES. Maximal size of possible extension queue 2711. Compared 522462 event pairs, 7229 based on Foata normal form. 543/53451 useless extension candidates. Maximal degree in co-relation 465756. Up to 38065 conditions per place. [2023-11-29 05:42:29,473 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 2206 selfloop transitions, 819 changer transitions 2/3030 dead transitions. [2023-11-29 05:42:29,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 3030 transitions, 71743 flow [2023-11-29 05:42:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:42:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:42:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 211 transitions. [2023-11-29 05:42:29,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279918864097363 [2023-11-29 05:42:29,475 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 211 transitions. [2023-11-29 05:42:29,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 211 transitions. [2023-11-29 05:42:29,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:29,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 211 transitions. [2023-11-29 05:42:29,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 17 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:29,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:29,477 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:29,477 INFO L175 Difference]: Start difference. First operand has 423 places, 2699 transitions, 58832 flow. Second operand 17 states and 211 transitions. [2023-11-29 05:42:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 3030 transitions, 71743 flow [2023-11-29 05:43:31,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 3030 transitions, 69024 flow, removed 1262 selfloop flow, removed 8 redundant places. [2023-11-29 05:43:31,521 INFO L231 Difference]: Finished difference. Result has 434 places, 2767 transitions, 60514 flow [2023-11-29 05:43:31,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56238, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=735, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=60514, PETRI_PLACES=434, PETRI_TRANSITIONS=2767} [2023-11-29 05:43:31,523 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 407 predicate places. [2023-11-29 05:43:31,524 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 2767 transitions, 60514 flow [2023-11-29 05:43:31,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.7) internal successors, (154), 20 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:31,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:31,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:31,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:31,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 05:43:31,725 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:43:31,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:31,725 INFO L85 PathProgramCache]: Analyzing trace with hash 504047724, now seen corresponding path program 7 times [2023-11-29 05:43:31,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:31,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782781009] [2023-11-29 05:43:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:31,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:43:31,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:31,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782781009] [2023-11-29 05:43:31,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782781009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:31,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871956991] [2023-11-29 05:43:31,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:43:31,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:31,986 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:31,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:43:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:32,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:43:32,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:32,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:32,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-29 05:43:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:43:32,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:32,316 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:43:32,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:43:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:43:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871956991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:32,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:32,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 18 [2023-11-29 05:43:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638050871] [2023-11-29 05:43:32,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:32,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:43:32,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:43:32,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:43:32,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:43:32,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 2767 transitions, 60514 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:32,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:32,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:43:32,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:19,650 INFO L124 PetriNetUnfolderBase]: 28962/53500 cut-off events. [2023-11-29 05:44:19,650 INFO L125 PetriNetUnfolderBase]: For 2680349/2680352 co-relation queries the response was YES. [2023-11-29 05:44:20,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460722 conditions, 53500 events. 28962/53500 cut-off events. For 2680349/2680352 co-relation queries the response was YES. Maximal size of possible extension queue 2645. Compared 529733 event pairs, 8462 based on Foata normal form. 354/53846 useless extension candidates. Maximal degree in co-relation 460539. Up to 45176 conditions per place. [2023-11-29 05:44:20,890 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 2272 selfloop transitions, 637 changer transitions 10/2922 dead transitions. [2023-11-29 05:44:20,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 2922 transitions, 68618 flow [2023-11-29 05:44:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:44:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 05:44:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 229 transitions. [2023-11-29 05:44:20,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41560798548094374 [2023-11-29 05:44:20,891 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 229 transitions. [2023-11-29 05:44:20,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 229 transitions. [2023-11-29 05:44:20,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:20,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 229 transitions. [2023-11-29 05:44:20,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.052631578947368) internal successors, (229), 19 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:20,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:20,893 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:20,893 INFO L175 Difference]: Start difference. First operand has 434 places, 2767 transitions, 60514 flow. Second operand 19 states and 229 transitions. [2023-11-29 05:44:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 2922 transitions, 68618 flow [2023-11-29 05:45:16,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 2922 transitions, 67145 flow, removed 112 selfloop flow, removed 12 redundant places. [2023-11-29 05:45:16,781 INFO L231 Difference]: Finished difference. Result has 443 places, 2803 transitions, 61397 flow [2023-11-29 05:45:16,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=59087, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=61397, PETRI_PLACES=443, PETRI_TRANSITIONS=2803} [2023-11-29 05:45:16,783 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 416 predicate places. [2023-11-29 05:45:16,783 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 2803 transitions, 61397 flow [2023-11-29 05:45:16,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:16,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:16,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:16,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:45:16,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 05:45:16,984 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:45:16,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2126258226, now seen corresponding path program 8 times [2023-11-29 05:45:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318551427] [2023-11-29 05:45:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:45:17,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:17,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318551427] [2023-11-29 05:45:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318551427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:17,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099944342] [2023-11-29 05:45:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:45:17,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:17,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:17,292 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:17,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:45:17,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:45:17,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:45:17,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:45:17,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:17,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:45:17,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-29 05:45:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:45:17,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:17,652 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-29 05:45:17,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-29 05:45:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:45:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099944342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:17,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:17,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2023-11-29 05:45:17,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220141289] [2023-11-29 05:45:17,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:17,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:45:17,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:45:17,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:45:17,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:45:17,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 2803 transitions, 61397 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:17,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:17,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:45:17,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:09,449 INFO L124 PetriNetUnfolderBase]: 28572/52628 cut-off events. [2023-11-29 05:46:09,449 INFO L125 PetriNetUnfolderBase]: For 2604419/2604422 co-relation queries the response was YES. [2023-11-29 05:46:10,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457217 conditions, 52628 events. 28572/52628 cut-off events. For 2604419/2604422 co-relation queries the response was YES. Maximal size of possible extension queue 2547. Compared 516491 event pairs, 8366 based on Foata normal form. 62/52682 useless extension candidates. Maximal degree in co-relation 457031. Up to 45176 conditions per place. [2023-11-29 05:46:10,728 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 2268 selfloop transitions, 636 changer transitions 18/2925 dead transitions. [2023-11-29 05:46:10,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 2925 transitions, 68382 flow [2023-11-29 05:46:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:46:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:46:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 252 transitions. [2023-11-29 05:46:10,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-29 05:46:10,730 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 252 transitions. [2023-11-29 05:46:10,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 252 transitions. [2023-11-29 05:46:10,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:10,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 252 transitions. [2023-11-29 05:46:10,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 12.0) internal successors, (252), 21 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:10,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:10,732 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:10,732 INFO L175 Difference]: Start difference. First operand has 443 places, 2803 transitions, 61397 flow. Second operand 21 states and 252 transitions. [2023-11-29 05:46:10,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 2925 transitions, 68382 flow [2023-11-29 05:47:16,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 2925 transitions, 67970 flow, removed 14 selfloop flow, removed 9 redundant places. [2023-11-29 05:47:16,250 INFO L231 Difference]: Finished difference. Result has 456 places, 2801 transitions, 62265 flow [2023-11-29 05:47:16,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=60644, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=62265, PETRI_PLACES=456, PETRI_TRANSITIONS=2801} [2023-11-29 05:47:16,253 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 429 predicate places. [2023-11-29 05:47:16,253 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 2801 transitions, 62265 flow [2023-11-29 05:47:16,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:16,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:47:16,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:16,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:47:16,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:16,454 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:47:16,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1952361928, now seen corresponding path program 8 times [2023-11-29 05:47:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:16,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323871360] [2023-11-29 05:47:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:16,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323871360] [2023-11-29 05:47:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323871360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113063706] [2023-11-29 05:47:16,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:47:16,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:16,733 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:16,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:47:16,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:47:16,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:16,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:47:16,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:17,018 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 05:47:17,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-29 05:47:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:17,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:17,116 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-11-29 05:47:17,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-11-29 05:47:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:47:17,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113063706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:17,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:17,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-11-29 05:47:17,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116614385] [2023-11-29 05:47:17,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:17,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:47:17,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:47:17,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:47:17,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:47:17,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 2801 transitions, 62265 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:17,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:47:17,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:47:17,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:48:24,077 INFO L124 PetriNetUnfolderBase]: 34002/62697 cut-off events. [2023-11-29 05:48:24,077 INFO L125 PetriNetUnfolderBase]: For 3325807/3325810 co-relation queries the response was YES. [2023-11-29 05:48:25,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552100 conditions, 62697 events. 34002/62697 cut-off events. For 3325807/3325810 co-relation queries the response was YES. Maximal size of possible extension queue 2958. Compared 627442 event pairs, 8496 based on Foata normal form. 553/63242 useless extension candidates. Maximal degree in co-relation 551913. Up to 37699 conditions per place. [2023-11-29 05:48:25,553 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 3057 selfloop transitions, 747 changer transitions 2/3809 dead transitions. [2023-11-29 05:48:25,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 3809 transitions, 90379 flow [2023-11-29 05:48:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:48:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:48:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 217 transitions. [2023-11-29 05:48:25,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676724137931034 [2023-11-29 05:48:25,555 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 217 transitions. [2023-11-29 05:48:25,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 217 transitions. [2023-11-29 05:48:25,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:48:25,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 217 transitions. [2023-11-29 05:48:25,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:25,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:25,557 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:25,557 INFO L175 Difference]: Start difference. First operand has 456 places, 2801 transitions, 62265 flow. Second operand 16 states and 217 transitions. [2023-11-29 05:48:25,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 3809 transitions, 90379 flow [2023-11-29 05:50:08,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 3809 transitions, 88971 flow, removed 85 selfloop flow, removed 16 redundant places. [2023-11-29 05:50:08,642 INFO L231 Difference]: Finished difference. Result has 456 places, 3059 transitions, 69394 flow [2023-11-29 05:50:08,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=60726, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=69394, PETRI_PLACES=456, PETRI_TRANSITIONS=3059} [2023-11-29 05:50:08,645 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 429 predicate places. [2023-11-29 05:50:08,645 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 3059 transitions, 69394 flow [2023-11-29 05:50:08,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:08,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:50:08,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:08,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:50:08,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:08,846 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:50:08,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:08,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1700565130, now seen corresponding path program 9 times [2023-11-29 05:50:08,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:08,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990709848] [2023-11-29 05:50:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:08,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:50:09,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:09,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990709848] [2023-11-29 05:50:09,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990709848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:50:09,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970846280] [2023-11-29 05:50:09,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:50:09,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:09,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:09,207 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:09,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca355936-44bc-4749-a000-d6566aa342c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:50:09,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:50:09,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:09,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 05:50:09,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:09,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:50:09,880 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:50:09,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 05:50:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:50:09,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:10,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:50:10,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2023-11-29 05:50:10,712 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:50:10,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-11-29 05:50:10,778 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2023-11-29 05:50:10,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 207 [2023-11-29 05:50:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:50:11,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970846280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:11,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:50:11,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 31 [2023-11-29 05:50:11,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284610813] [2023-11-29 05:50:11,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:11,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 05:50:11,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 05:50:11,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2023-11-29 05:50:11,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-29 05:50:11,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 3059 transitions, 69394 flow. Second operand has 32 states, 32 states have (on average 7.15625) internal successors, (229), 32 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:11,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:50:11,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-29 05:50:11,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:51:33,951 INFO L124 PetriNetUnfolderBase]: 36479/67522 cut-off events. [2023-11-29 05:51:33,951 INFO L125 PetriNetUnfolderBase]: For 3876114/3876117 co-relation queries the response was YES. [2023-11-29 05:51:35,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611205 conditions, 67522 events. 36479/67522 cut-off events. For 3876114/3876117 co-relation queries the response was YES. Maximal size of possible extension queue 3208. Compared 686854 event pairs, 9123 based on Foata normal form. 34/67548 useless extension candidates. Maximal degree in co-relation 611011. Up to 46431 conditions per place. [2023-11-29 05:51:35,797 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 1785 selfloop transitions, 1681 changer transitions 62/3531 dead transitions. [2023-11-29 05:51:35,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 3531 transitions, 85920 flow [2023-11-29 05:51:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 05:51:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 05:51:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 315 transitions. [2023-11-29 05:51:35,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177718832891247 [2023-11-29 05:51:35,799 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 315 transitions. [2023-11-29 05:51:35,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 315 transitions. [2023-11-29 05:51:35,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:51:35,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 315 transitions. [2023-11-29 05:51:35,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 12.115384615384615) internal successors, (315), 26 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:35,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 29.0) internal successors, (783), 27 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:35,801 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 29.0) internal successors, (783), 27 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:35,801 INFO L175 Difference]: Start difference. First operand has 456 places, 3059 transitions, 69394 flow. Second operand 26 states and 315 transitions. [2023-11-29 05:51:35,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 3531 transitions, 85920 flow