./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:21:58,624 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:21:58,721 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 18:21:58,728 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:21:58,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:21:58,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:21:58,761 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:21:58,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:21:58,762 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:21:58,763 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:21:58,763 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:21:58,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:21:58,765 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:21:58,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:21:58,766 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:21:58,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:21:58,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 18:21:58,767 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:21:58,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:21:58,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:21:58,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:21:58,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 18:21:58,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:21:58,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 18:21:58,774 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:21:58,774 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:21:58,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 18:21:58,775 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:21:58,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:21:58,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:21:58,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:21:58,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:21:58,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:21:58,781 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:21:58,782 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:21:58,782 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 18:21:58,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:21:58,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:21:58,783 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:21:58,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:21:58,784 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:21:58,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:21:58,785 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_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-11-08 18:21:59,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:21:59,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:21:59,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:21:59,171 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:21:59,172 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:21:59,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c Unable to find full path for "g++" [2024-11-08 18:22:01,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:22:01,836 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:22:01,837 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-08 18:22:01,849 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/data/ad66b8de1/01388a67bba1481fbe2d31de8c277491/FLAG849904cbe [2024-11-08 18:22:01,869 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/data/ad66b8de1/01388a67bba1481fbe2d31de8c277491 [2024-11-08 18:22:01,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:22:01,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:22:01,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:22:01,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:22:01,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:22:01,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:22:01" (1/1) ... [2024-11-08 18:22:01,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f0a2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:01, skipping insertion in model container [2024-11-08 18:22:01,889 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:22:01" (1/1) ... [2024-11-08 18:22:01,918 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:22:02,169 WARN L250 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_d5dd0e68-18b3-4b6d-bb8c-248725a78642/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-08 18:22:02,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:22:02,186 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:22:02,210 WARN L250 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_d5dd0e68-18b3-4b6d-bb8c-248725a78642/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-08 18:22:02,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:22:02,231 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:22:02,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02 WrapperNode [2024-11-08 18:22:02,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:22:02,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:22:02,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:22:02,234 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:22:02,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,275 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-11-08 18:22:02,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:22:02,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:22:02,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:22:02,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:22:02,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,293 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,308 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-08 18:22:02,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,309 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:22:02,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:22:02,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:22:02,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:22:02,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (1/1) ... [2024-11-08 18:22:02,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:22:02,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:02,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:22:02,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:22:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:22:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:22:02,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:22:02,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:22:02,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:22:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:22:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 18:22:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 18:22:02,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:22:02,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:22:02,413 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:22:02,520 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:22:02,523 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:22:02,805 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:22:02,806 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:22:03,060 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:22:03,061 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:22:03,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:22:03 BoogieIcfgContainer [2024-11-08 18:22:03,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:22:03,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:22:03,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:22:03,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:22:03,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:22:01" (1/3) ... [2024-11-08 18:22:03,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4513bd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:22:03, skipping insertion in model container [2024-11-08 18:22:03,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:22:02" (2/3) ... [2024-11-08 18:22:03,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4513bd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:22:03, skipping insertion in model container [2024-11-08 18:22:03,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:22:03" (3/3) ... [2024-11-08 18:22:03,075 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-11-08 18:22:03,095 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:22:03,096 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 18:22:03,096 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:22:03,152 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 18:22:03,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2024-11-08 18:22:03,269 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-08 18:22:03,269 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 18:22:03,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-08 18:22:03,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2024-11-08 18:22:03,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2024-11-08 18:22:03,323 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:22:03,341 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67bcb6af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:22:03,342 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-08 18:22:03,360 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:22:03,360 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2024-11-08 18:22:03,360 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 18:22:03,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:03,361 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:22:03,362 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:03,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1916317962, now seen corresponding path program 1 times [2024-11-08 18:22:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:03,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845459569] [2024-11-08 18:22:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:03,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:03,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:03,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845459569] [2024-11-08 18:22:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845459569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:22:03,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:22:03,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:22:03,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566232717] [2024-11-08 18:22:03,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:22:03,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:22:03,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:22:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:22:03,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-11-08 18:22:03,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2024-11-08 18:22:03,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:03,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-11-08 18:22:03,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:04,071 INFO L124 PetriNetUnfolderBase]: 92/182 cut-off events. [2024-11-08 18:22:04,072 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-08 18:22:04,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 182 events. 92/182 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 616 event pairs, 40 based on Foata normal form. 16/180 useless extension candidates. Maximal degree in co-relation 326. Up to 113 conditions per place. [2024-11-08 18:22:04,077 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 22 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-08 18:22:04,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 129 flow [2024-11-08 18:22:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:22:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:22:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-08 18:22:04,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-08 18:22:04,095 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 4 states and 63 transitions. [2024-11-08 18:22:04,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 129 flow [2024-11-08 18:22:04,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:22:04,102 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 68 flow [2024-11-08 18:22:04,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2024-11-08 18:22:04,108 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-08 18:22:04,109 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 68 flow [2024-11-08 18:22:04,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2024-11-08 18:22:04,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:04,109 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:22:04,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:22:04,110 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:04,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:04,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1052615672, now seen corresponding path program 1 times [2024-11-08 18:22:04,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:04,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614940669] [2024-11-08 18:22:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:04,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:04,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:04,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614940669] [2024-11-08 18:22:04,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614940669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:22:04,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:22:04,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:22:04,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315934275] [2024-11-08 18:22:04,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:22:04,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:22:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:22:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:22:04,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-11-08 18:22:04,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:04,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:04,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-11-08 18:22:04,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:04,461 INFO L124 PetriNetUnfolderBase]: 127/262 cut-off events. [2024-11-08 18:22:04,462 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-08 18:22:04,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 262 events. 127/262 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1010 event pairs, 66 based on Foata normal form. 26/276 useless extension candidates. Maximal degree in co-relation 125. Up to 169 conditions per place. [2024-11-08 18:22:04,469 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 23 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-11-08 18:22:04,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 145 flow [2024-11-08 18:22:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:22:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:22:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-08 18:22:04,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-08 18:22:04,472 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 68 flow. Second operand 4 states and 62 transitions. [2024-11-08 18:22:04,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 145 flow [2024-11-08 18:22:04,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:22:04,475 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 80 flow [2024-11-08 18:22:04,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-08 18:22:04,477 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-11-08 18:22:04,477 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 80 flow [2024-11-08 18:22:04,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:04,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:04,478 INFO L204 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] [2024-11-08 18:22:04,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:22:04,478 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:04,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1746929033, now seen corresponding path program 1 times [2024-11-08 18:22:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:04,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773319056] [2024-11-08 18:22:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:04,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773319056] [2024-11-08 18:22:04,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773319056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:04,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128377786] [2024-11-08 18:22:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:04,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:04,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:22:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:04,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:22:04,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:05,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:05,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128377786] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:05,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:22:05,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-11-08 18:22:05,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016522316] [2024-11-08 18:22:05,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:22:05,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:22:05,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:22:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:22:05,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 27 [2024-11-08 18:22:05,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 80 flow. Second operand has 5 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) [2024-11-08 18:22:05,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:05,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 27 [2024-11-08 18:22:05,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:05,667 INFO L124 PetriNetUnfolderBase]: 184/403 cut-off events. [2024-11-08 18:22:05,667 INFO L125 PetriNetUnfolderBase]: For 116/132 co-relation queries the response was YES. [2024-11-08 18:22:05,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 403 events. 184/403 cut-off events. For 116/132 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1792 event pairs, 23 based on Foata normal form. 1/395 useless extension candidates. Maximal degree in co-relation 281. Up to 97 conditions per place. [2024-11-08 18:22:05,679 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 36 selfloop transitions, 5 changer transitions 2/52 dead transitions. [2024-11-08 18:22:05,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 52 transitions, 246 flow [2024-11-08 18:22:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:22:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:22:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-08 18:22:05,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2024-11-08 18:22:05,683 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 80 flow. Second operand 4 states and 83 transitions. [2024-11-08 18:22:05,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 52 transitions, 246 flow [2024-11-08 18:22:05,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:22:05,689 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 114 flow [2024-11-08 18:22:05,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-11-08 18:22:05,692 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2024-11-08 18:22:05,693 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 114 flow [2024-11-08 18:22:05,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2024-11-08 18:22:05,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:05,693 INFO L204 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] [2024-11-08 18:22:05,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 18:22:05,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:05,899 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:05,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash -166477055, now seen corresponding path program 2 times [2024-11-08 18:22:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:05,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469683558] [2024-11-08 18:22:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:05,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:06,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:06,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469683558] [2024-11-08 18:22:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469683558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:06,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755249305] [2024-11-08 18:22:06,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:22:06,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:06,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:06,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:22:06,202 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:22:06,202 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:06,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 18:22:06,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:06,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:06,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755249305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:06,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:06,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-08 18:22:06,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490725248] [2024-11-08 18:22:06,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:06,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 18:22:06,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 18:22:06,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-11-08 18:22:06,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-11-08 18:22:06,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 114 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:06,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:06,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-11-08 18:22:06,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:07,074 INFO L124 PetriNetUnfolderBase]: 464/895 cut-off events. [2024-11-08 18:22:07,076 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-11-08 18:22:07,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2186 conditions, 895 events. 464/895 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4489 event pairs, 49 based on Foata normal form. 59/944 useless extension candidates. Maximal degree in co-relation 776. Up to 298 conditions per place. [2024-11-08 18:22:07,086 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 44 selfloop transitions, 13 changer transitions 0/62 dead transitions. [2024-11-08 18:22:07,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 355 flow [2024-11-08 18:22:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:22:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:22:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-11-08 18:22:07,089 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5493827160493827 [2024-11-08 18:22:07,089 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 114 flow. Second operand 6 states and 89 transitions. [2024-11-08 18:22:07,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 355 flow [2024-11-08 18:22:07,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 355 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:22:07,094 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 231 flow [2024-11-08 18:22:07,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-08 18:22:07,095 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2024-11-08 18:22:07,095 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 231 flow [2024-11-08 18:22:07,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:07,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:07,096 INFO L204 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] [2024-11-08 18:22:07,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 18:22:07,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:07,301 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:07,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:07,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1074563785, now seen corresponding path program 3 times [2024-11-08 18:22:07,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:07,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739114718] [2024-11-08 18:22:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:07,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:07,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739114718] [2024-11-08 18:22:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739114718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499495878] [2024-11-08 18:22:07,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:22:07,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:07,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:07,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:22:07,622 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 18:22:07,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:07,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:22:07,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:07,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:22:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499495878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:08,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:08,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-08 18:22:08,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028765243] [2024-11-08 18:22:08,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:08,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 18:22:08,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 18:22:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:22:08,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:08,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 231 flow. Second operand has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 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) [2024-11-08 18:22:08,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:08,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:08,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:09,850 INFO L124 PetriNetUnfolderBase]: 2586/4206 cut-off events. [2024-11-08 18:22:09,850 INFO L125 PetriNetUnfolderBase]: For 5421/5421 co-relation queries the response was YES. [2024-11-08 18:22:09,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12199 conditions, 4206 events. 2586/4206 cut-off events. For 5421/5421 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 22429 event pairs, 115 based on Foata normal form. 70/4276 useless extension candidates. Maximal degree in co-relation 5021. Up to 743 conditions per place. [2024-11-08 18:22:09,882 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 198 selfloop transitions, 132 changer transitions 10/341 dead transitions. [2024-11-08 18:22:09,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 341 transitions, 2303 flow [2024-11-08 18:22:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-08 18:22:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-08 18:22:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 383 transitions. [2024-11-08 18:22:09,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3833833833833834 [2024-11-08 18:22:09,889 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 231 flow. Second operand 37 states and 383 transitions. [2024-11-08 18:22:09,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 341 transitions, 2303 flow [2024-11-08 18:22:09,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 341 transitions, 2291 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-08 18:22:09,917 INFO L231 Difference]: Finished difference. Result has 100 places, 171 transitions, 1534 flow [2024-11-08 18:22:09,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1534, PETRI_PLACES=100, PETRI_TRANSITIONS=171} [2024-11-08 18:22:09,922 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 73 predicate places. [2024-11-08 18:22:09,922 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 171 transitions, 1534 flow [2024-11-08 18:22:09,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 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) [2024-11-08 18:22:09,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:09,923 INFO L204 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] [2024-11-08 18:22:09,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:22:10,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:10,124 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:10,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:10,127 INFO L85 PathProgramCache]: Analyzing trace with hash -207268131, now seen corresponding path program 4 times [2024-11-08 18:22:10,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:10,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266125664] [2024-11-08 18:22:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:10,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:10,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266125664] [2024-11-08 18:22:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266125664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592075441] [2024-11-08 18:22:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:22:10,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:10,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:10,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:22:10,412 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:22:10,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:10,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:22:10,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:10,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592075441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:10,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-11-08 18:22:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89755676] [2024-11-08 18:22:10,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:10,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 18:22:10,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 18:22:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-08 18:22:10,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:10,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 171 transitions, 1534 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:10,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:10,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:10,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:12,600 INFO L124 PetriNetUnfolderBase]: 3654/6011 cut-off events. [2024-11-08 18:22:12,601 INFO L125 PetriNetUnfolderBase]: For 36895/36895 co-relation queries the response was YES. [2024-11-08 18:22:12,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27557 conditions, 6011 events. 3654/6011 cut-off events. For 36895/36895 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 35066 event pairs, 379 based on Foata normal form. 72/6083 useless extension candidates. Maximal degree in co-relation 24513. Up to 1717 conditions per place. [2024-11-08 18:22:12,670 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 240 selfloop transitions, 178 changer transitions 24/443 dead transitions. [2024-11-08 18:22:12,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 443 transitions, 4753 flow [2024-11-08 18:22:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 18:22:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-08 18:22:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 282 transitions. [2024-11-08 18:22:12,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4177777777777778 [2024-11-08 18:22:12,673 INFO L175 Difference]: Start difference. First operand has 100 places, 171 transitions, 1534 flow. Second operand 25 states and 282 transitions. [2024-11-08 18:22:12,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 443 transitions, 4753 flow [2024-11-08 18:22:13,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 443 transitions, 4686 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-11-08 18:22:13,234 INFO L231 Difference]: Finished difference. Result has 139 places, 270 transitions, 3205 flow [2024-11-08 18:22:13,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3205, PETRI_PLACES=139, PETRI_TRANSITIONS=270} [2024-11-08 18:22:13,235 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2024-11-08 18:22:13,236 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 270 transitions, 3205 flow [2024-11-08 18:22:13,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:13,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:13,236 INFO L204 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] [2024-11-08 18:22:13,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 18:22:13,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 18:22:13,441 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:13,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1472515943, now seen corresponding path program 5 times [2024-11-08 18:22:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:13,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049742688] [2024-11-08 18:22:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:13,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:13,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049742688] [2024-11-08 18:22:13,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049742688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:13,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838196080] [2024-11-08 18:22:13,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:22:13,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:13,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:13,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:13,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:22:13,675 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 18:22:13,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:13,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:22:13,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:13,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:14,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838196080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:14,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-08 18:22:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297438429] [2024-11-08 18:22:14,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:14,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 18:22:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 18:22:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:22:14,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:14,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 270 transitions, 3205 flow. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:14,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:14,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:14,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:16,663 INFO L124 PetriNetUnfolderBase]: 4311/7097 cut-off events. [2024-11-08 18:22:16,664 INFO L125 PetriNetUnfolderBase]: For 82267/82267 co-relation queries the response was YES. [2024-11-08 18:22:16,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39832 conditions, 7097 events. 4311/7097 cut-off events. For 82267/82267 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 42950 event pairs, 470 based on Foata normal form. 32/7129 useless extension candidates. Maximal degree in co-relation 36883. Up to 2550 conditions per place. [2024-11-08 18:22:16,758 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 271 selfloop transitions, 273 changer transitions 21/566 dead transitions. [2024-11-08 18:22:16,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 566 transitions, 7644 flow [2024-11-08 18:22:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-08 18:22:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-08 18:22:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 300 transitions. [2024-11-08 18:22:16,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-11-08 18:22:16,760 INFO L175 Difference]: Start difference. First operand has 139 places, 270 transitions, 3205 flow. Second operand 28 states and 300 transitions. [2024-11-08 18:22:16,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 566 transitions, 7644 flow [2024-11-08 18:22:17,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 566 transitions, 7388 flow, removed 126 selfloop flow, removed 1 redundant places. [2024-11-08 18:22:17,353 INFO L231 Difference]: Finished difference. Result has 175 places, 420 transitions, 5840 flow [2024-11-08 18:22:17,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5840, PETRI_PLACES=175, PETRI_TRANSITIONS=420} [2024-11-08 18:22:17,355 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 148 predicate places. [2024-11-08 18:22:17,355 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 420 transitions, 5840 flow [2024-11-08 18:22:17,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:17,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:17,355 INFO L204 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] [2024-11-08 18:22:17,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:22:17,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:17,560 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:17,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1166958441, now seen corresponding path program 6 times [2024-11-08 18:22:17,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:17,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689098988] [2024-11-08 18:22:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:17,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:17,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689098988] [2024-11-08 18:22:17,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689098988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:17,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813878910] [2024-11-08 18:22:17,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:22:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:17,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:17,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:22:17,821 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 18:22:17,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:17,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:22:17,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:17,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:22:18,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813878910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:18,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:18,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-08 18:22:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467972239] [2024-11-08 18:22:18,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:18,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 18:22:18,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 18:22:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:22:18,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:18,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 420 transitions, 5840 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:18,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:18,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:18,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:20,756 INFO L124 PetriNetUnfolderBase]: 4331/7154 cut-off events. [2024-11-08 18:22:20,756 INFO L125 PetriNetUnfolderBase]: For 108515/108515 co-relation queries the response was YES. [2024-11-08 18:22:20,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47355 conditions, 7154 events. 4331/7154 cut-off events. For 108515/108515 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 43462 event pairs, 316 based on Foata normal form. 24/7178 useless extension candidates. Maximal degree in co-relation 45338. Up to 1481 conditions per place. [2024-11-08 18:22:20,927 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 268 selfloop transitions, 301 changer transitions 1/571 dead transitions. [2024-11-08 18:22:20,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 571 transitions, 8802 flow [2024-11-08 18:22:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 18:22:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-08 18:22:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 293 transitions. [2024-11-08 18:22:20,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.401920438957476 [2024-11-08 18:22:20,929 INFO L175 Difference]: Start difference. First operand has 175 places, 420 transitions, 5840 flow. Second operand 27 states and 293 transitions. [2024-11-08 18:22:20,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 571 transitions, 8802 flow [2024-11-08 18:22:21,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 571 transitions, 8368 flow, removed 202 selfloop flow, removed 6 redundant places. [2024-11-08 18:22:21,793 INFO L231 Difference]: Finished difference. Result has 200 places, 447 transitions, 6672 flow [2024-11-08 18:22:21,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6672, PETRI_PLACES=200, PETRI_TRANSITIONS=447} [2024-11-08 18:22:21,794 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2024-11-08 18:22:21,795 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 447 transitions, 6672 flow [2024-11-08 18:22:21,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:21,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:21,795 INFO L204 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] [2024-11-08 18:22:21,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:22:21,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-08 18:22:22,000 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:22,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1859393275, now seen corresponding path program 7 times [2024-11-08 18:22:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:22,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583135165] [2024-11-08 18:22:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:22,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:22,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583135165] [2024-11-08 18:22:22,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583135165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:22,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048128870] [2024-11-08 18:22:22,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:22:22,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:22,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:22,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:22,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:22:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:22,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 18:22:22,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:22,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:22,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048128870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:22,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:22,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-11-08 18:22:22,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142639550] [2024-11-08 18:22:22,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:22,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 18:22:22,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 18:22:22,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2024-11-08 18:22:22,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:22,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 447 transitions, 6672 flow. Second operand has 23 states, 23 states have (on average 5.956521739130435) internal successors, (137), 23 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:22,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:22,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:22,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:26,275 INFO L124 PetriNetUnfolderBase]: 5121/8508 cut-off events. [2024-11-08 18:22:26,275 INFO L125 PetriNetUnfolderBase]: For 144144/144144 co-relation queries the response was YES. [2024-11-08 18:22:26,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59061 conditions, 8508 events. 5121/8508 cut-off events. For 144144/144144 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 52864 event pairs, 417 based on Foata normal form. 58/8566 useless extension candidates. Maximal degree in co-relation 58235. Up to 2184 conditions per place. [2024-11-08 18:22:26,364 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 335 selfloop transitions, 442 changer transitions 12/790 dead transitions. [2024-11-08 18:22:26,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 790 transitions, 12580 flow [2024-11-08 18:22:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 18:22:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-08 18:22:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 455 transitions. [2024-11-08 18:22:26,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37448559670781895 [2024-11-08 18:22:26,368 INFO L175 Difference]: Start difference. First operand has 200 places, 447 transitions, 6672 flow. Second operand 45 states and 455 transitions. [2024-11-08 18:22:26,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 790 transitions, 12580 flow [2024-11-08 18:22:27,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 790 transitions, 12173 flow, removed 114 selfloop flow, removed 14 redundant places. [2024-11-08 18:22:27,528 INFO L231 Difference]: Finished difference. Result has 245 places, 578 transitions, 10160 flow [2024-11-08 18:22:27,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10160, PETRI_PLACES=245, PETRI_TRANSITIONS=578} [2024-11-08 18:22:27,529 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 218 predicate places. [2024-11-08 18:22:27,529 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 578 transitions, 10160 flow [2024-11-08 18:22:27,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.956521739130435) internal successors, (137), 23 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:27,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:27,530 INFO L204 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] [2024-11-08 18:22:27,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:22:27,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:27,731 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:27,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1839709761, now seen corresponding path program 8 times [2024-11-08 18:22:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:27,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302871669] [2024-11-08 18:22:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:27,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:27,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302871669] [2024-11-08 18:22:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302871669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961059079] [2024-11-08 18:22:27,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:22:27,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:27,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:27,878 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:27,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:22:27,931 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:22:27,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:27,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:22:27,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:28,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:28,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961059079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:28,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:28,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-08 18:22:28,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236147739] [2024-11-08 18:22:28,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:28,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 18:22:28,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:28,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 18:22:28,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:22:28,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:28,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 578 transitions, 10160 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 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) [2024-11-08 18:22:28,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:28,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:28,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:31,793 INFO L124 PetriNetUnfolderBase]: 5469/9016 cut-off events. [2024-11-08 18:22:31,793 INFO L125 PetriNetUnfolderBase]: For 205577/205577 co-relation queries the response was YES. [2024-11-08 18:22:31,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69698 conditions, 9016 events. 5469/9016 cut-off events. For 205577/205577 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 56539 event pairs, 424 based on Foata normal form. 28/9044 useless extension candidates. Maximal degree in co-relation 68885. Up to 2043 conditions per place. [2024-11-08 18:22:31,882 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 315 selfloop transitions, 448 changer transitions 4/768 dead transitions. [2024-11-08 18:22:31,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 768 transitions, 14384 flow [2024-11-08 18:22:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 18:22:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-08 18:22:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 301 transitions. [2024-11-08 18:22:31,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384418901660281 [2024-11-08 18:22:31,885 INFO L175 Difference]: Start difference. First operand has 245 places, 578 transitions, 10160 flow. Second operand 29 states and 301 transitions. [2024-11-08 18:22:31,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 768 transitions, 14384 flow [2024-11-08 18:22:33,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 768 transitions, 14059 flow, removed 105 selfloop flow, removed 16 redundant places. [2024-11-08 18:22:33,900 INFO L231 Difference]: Finished difference. Result has 268 places, 632 transitions, 12351 flow [2024-11-08 18:22:33,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9902, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12351, PETRI_PLACES=268, PETRI_TRANSITIONS=632} [2024-11-08 18:22:33,901 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 241 predicate places. [2024-11-08 18:22:33,901 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 632 transitions, 12351 flow [2024-11-08 18:22:33,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 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) [2024-11-08 18:22:33,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:33,902 INFO L204 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] [2024-11-08 18:22:33,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 18:22:34,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 18:22:34,103 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:34,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:34,104 INFO L85 PathProgramCache]: Analyzing trace with hash -284993831, now seen corresponding path program 9 times [2024-11-08 18:22:34,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:34,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719590338] [2024-11-08 18:22:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:34,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:34,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:34,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719590338] [2024-11-08 18:22:34,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719590338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:34,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162317863] [2024-11-08 18:22:34,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:22:34,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:34,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:34,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:34,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:22:34,361 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 18:22:34,361 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:34,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 18:22:34,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:34,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:34,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162317863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:34,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:34,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-08 18:22:34,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792699180] [2024-11-08 18:22:34,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:34,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 18:22:34,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 18:22:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:22:34,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:34,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 632 transitions, 12351 flow. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:34,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:34,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:34,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:41,464 INFO L124 PetriNetUnfolderBase]: 9297/15306 cut-off events. [2024-11-08 18:22:41,464 INFO L125 PetriNetUnfolderBase]: For 417598/417598 co-relation queries the response was YES. [2024-11-08 18:22:41,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129164 conditions, 15306 events. 9297/15306 cut-off events. For 417598/417598 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 101427 event pairs, 471 based on Foata normal form. 58/15364 useless extension candidates. Maximal degree in co-relation 128321. Up to 3116 conditions per place. [2024-11-08 18:22:41,667 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 674 selfloop transitions, 932 changer transitions 232/1839 dead transitions. [2024-11-08 18:22:41,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1839 transitions, 38696 flow [2024-11-08 18:22:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 18:22:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-08 18:22:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 416 transitions. [2024-11-08 18:22:41,672 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-11-08 18:22:41,672 INFO L175 Difference]: Start difference. First operand has 268 places, 632 transitions, 12351 flow. Second operand 40 states and 416 transitions. [2024-11-08 18:22:41,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1839 transitions, 38696 flow [2024-11-08 18:22:48,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1839 transitions, 37398 flow, removed 199 selfloop flow, removed 11 redundant places. [2024-11-08 18:22:48,762 INFO L231 Difference]: Finished difference. Result has 313 places, 1166 transitions, 26766 flow [2024-11-08 18:22:48,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11745, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=26766, PETRI_PLACES=313, PETRI_TRANSITIONS=1166} [2024-11-08 18:22:48,763 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 286 predicate places. [2024-11-08 18:22:48,764 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 1166 transitions, 26766 flow [2024-11-08 18:22:48,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:48,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:48,764 INFO L204 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] [2024-11-08 18:22:48,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 18:22:48,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:48,965 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:22:48,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash 884370173, now seen corresponding path program 10 times [2024-11-08 18:22:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943850635] [2024-11-08 18:22:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:49,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:49,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943850635] [2024-11-08 18:22:49,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943850635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:49,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128551834] [2024-11-08 18:22:49,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:22:49,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:49,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:49,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:49,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:22:49,190 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:22:49,190 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:49,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:22:49,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:49,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:49,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128551834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:49,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:49,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-11-08 18:22:49,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384751067] [2024-11-08 18:22:49,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:49,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 18:22:49,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 18:22:49,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-08 18:22:49,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:22:49,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 1166 transitions, 26766 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:49,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:49,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:22:49,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:23:00,241 INFO L124 PetriNetUnfolderBase]: 11134/18472 cut-off events. [2024-11-08 18:23:00,242 INFO L125 PetriNetUnfolderBase]: For 617709/617709 co-relation queries the response was YES. [2024-11-08 18:23:00,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165885 conditions, 18472 events. 11134/18472 cut-off events. For 617709/617709 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 129478 event pairs, 573 based on Foata normal form. 103/18575 useless extension candidates. Maximal degree in co-relation 164991. Up to 4811 conditions per place. [2024-11-08 18:23:00,715 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 513 selfloop transitions, 1378 changer transitions 11/1903 dead transitions. [2024-11-08 18:23:00,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1903 transitions, 45850 flow [2024-11-08 18:23:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 18:23:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-08 18:23:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 333 transitions. [2024-11-08 18:23:00,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-11-08 18:23:00,718 INFO L175 Difference]: Start difference. First operand has 313 places, 1166 transitions, 26766 flow. Second operand 31 states and 333 transitions. [2024-11-08 18:23:00,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1903 transitions, 45850 flow [2024-11-08 18:23:11,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1903 transitions, 44820 flow, removed 406 selfloop flow, removed 6 redundant places. [2024-11-08 18:23:11,165 INFO L231 Difference]: Finished difference. Result has 347 places, 1659 transitions, 43071 flow [2024-11-08 18:23:11,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=26022, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43071, PETRI_PLACES=347, PETRI_TRANSITIONS=1659} [2024-11-08 18:23:11,166 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 320 predicate places. [2024-11-08 18:23:11,166 INFO L471 AbstractCegarLoop]: Abstraction has has 347 places, 1659 transitions, 43071 flow [2024-11-08 18:23:11,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:23:11,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:23:11,167 INFO L204 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] [2024-11-08 18:23:11,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 18:23:11,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:11,367 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:23:11,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:23:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 434287949, now seen corresponding path program 11 times [2024-11-08 18:23:11,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:23:11,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111468590] [2024-11-08 18:23:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:23:11,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:23:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:23:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:23:11,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:23:11,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111468590] [2024-11-08 18:23:11,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111468590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:23:11,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404769149] [2024-11-08 18:23:11,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:23:11,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:11,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:23:11,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:23:11,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:23:11,541 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-08 18:23:11,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:23:11,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:23:11,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:23:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:23:11,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:23:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:23:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404769149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:23:11,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:23:11,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-08 18:23:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154726861] [2024-11-08 18:23:11,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:23:11,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 18:23:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:23:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 18:23:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:23:11,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:23:11,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1659 transitions, 43071 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:23:11,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:23:11,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:23:11,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:23:29,086 INFO L124 PetriNetUnfolderBase]: 14135/23413 cut-off events. [2024-11-08 18:23:29,087 INFO L125 PetriNetUnfolderBase]: For 913285/913285 co-relation queries the response was YES. [2024-11-08 18:23:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226674 conditions, 23413 events. 14135/23413 cut-off events. For 913285/913285 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 166962 event pairs, 325 based on Foata normal form. 64/23477 useless extension candidates. Maximal degree in co-relation 225666. Up to 4904 conditions per place. [2024-11-08 18:23:29,860 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 657 selfloop transitions, 1875 changer transitions 32/2565 dead transitions. [2024-11-08 18:23:29,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 2565 transitions, 68539 flow [2024-11-08 18:23:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-08 18:23:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-08 18:23:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 517 transitions. [2024-11-08 18:23:29,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3907785336356765 [2024-11-08 18:23:29,863 INFO L175 Difference]: Start difference. First operand has 347 places, 1659 transitions, 43071 flow. Second operand 49 states and 517 transitions. [2024-11-08 18:23:29,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 2565 transitions, 68539 flow [2024-11-08 18:24:03,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 2565 transitions, 68214 flow, removed 151 selfloop flow, removed 3 redundant places. [2024-11-08 18:24:03,755 INFO L231 Difference]: Finished difference. Result has 414 places, 2226 transitions, 64726 flow [2024-11-08 18:24:03,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=42790, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=64726, PETRI_PLACES=414, PETRI_TRANSITIONS=2226} [2024-11-08 18:24:03,758 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 387 predicate places. [2024-11-08 18:24:03,758 INFO L471 AbstractCegarLoop]: Abstraction has has 414 places, 2226 transitions, 64726 flow [2024-11-08 18:24:03,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:24:03,759 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:24:03,759 INFO L204 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] [2024-11-08 18:24:03,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 18:24:03,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:24:03,963 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:24:03,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:24:03,963 INFO L85 PathProgramCache]: Analyzing trace with hash -936422067, now seen corresponding path program 12 times [2024-11-08 18:24:03,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:24:03,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393578269] [2024-11-08 18:24:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:24:03,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:24:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:24:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:24:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:24:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393578269] [2024-11-08 18:24:04,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393578269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:24:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852781684] [2024-11-08 18:24:04,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:24:04,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:24:04,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:24:04,156 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:24:04,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 18:24:04,226 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 18:24:04,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:24:04,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:24:04,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:24:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:24:04,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:24:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:24:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852781684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:24:04,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:24:04,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-08 18:24:04,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456293803] [2024-11-08 18:24:04,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:24:04,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 18:24:04,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:24:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 18:24:04,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-08 18:24:04,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:24:04,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 2226 transitions, 64726 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:24:04,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:24:04,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:24:04,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:24:34,230 INFO L124 PetriNetUnfolderBase]: 14072/23168 cut-off events. [2024-11-08 18:24:34,231 INFO L125 PetriNetUnfolderBase]: For 1144763/1144763 co-relation queries the response was YES. [2024-11-08 18:24:34,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249245 conditions, 23168 events. 14072/23168 cut-off events. For 1144763/1144763 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 164077 event pairs, 845 based on Foata normal form. 60/23228 useless extension candidates. Maximal degree in co-relation 248251. Up to 4931 conditions per place. [2024-11-08 18:24:34,790 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 892 selfloop transitions, 1556 changer transitions 9/2458 dead transitions. [2024-11-08 18:24:34,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 2458 transitions, 74402 flow [2024-11-08 18:24:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 18:24:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-08 18:24:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 288 transitions. [2024-11-08 18:24:34,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-11-08 18:24:34,793 INFO L175 Difference]: Start difference. First operand has 414 places, 2226 transitions, 64726 flow. Second operand 26 states and 288 transitions. [2024-11-08 18:24:34,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 2458 transitions, 74402 flow [2024-11-08 18:25:07,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 2458 transitions, 72769 flow, removed 560 selfloop flow, removed 16 redundant places. [2024-11-08 18:25:07,175 INFO L231 Difference]: Finished difference. Result has 425 places, 2274 transitions, 69088 flow [2024-11-08 18:25:07,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=63091, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1497, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=69088, PETRI_PLACES=425, PETRI_TRANSITIONS=2274} [2024-11-08 18:25:07,178 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 398 predicate places. [2024-11-08 18:25:07,178 INFO L471 AbstractCegarLoop]: Abstraction has has 425 places, 2274 transitions, 69088 flow [2024-11-08 18:25:07,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:25:07,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:25:07,179 INFO L204 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] [2024-11-08 18:25:07,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 18:25:07,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:07,380 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:25:07,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:25:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2122169227, now seen corresponding path program 13 times [2024-11-08 18:25:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:25:07,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350183814] [2024-11-08 18:25:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:25:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:25:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:25:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:25:07,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:25:07,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350183814] [2024-11-08 18:25:07,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350183814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:25:07,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406182003] [2024-11-08 18:25:07,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:25:07,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:07,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:25:07,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:25:07,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 18:25:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:25:07,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:25:07,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:25:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:25:07,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:25:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:25:07,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406182003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:25:07,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:25:07,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-08 18:25:07,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341627891] [2024-11-08 18:25:07,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:25:07,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 18:25:07,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:25:07,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 18:25:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:25:07,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:25:07,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 2274 transitions, 69088 flow. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:25:07,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:25:07,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:25:07,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:25:35,765 INFO L124 PetriNetUnfolderBase]: 15022/24706 cut-off events. [2024-11-08 18:25:35,765 INFO L125 PetriNetUnfolderBase]: For 1341240/1341240 co-relation queries the response was YES. [2024-11-08 18:25:36,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277997 conditions, 24706 events. 15022/24706 cut-off events. For 1341240/1341240 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 177553 event pairs, 1794 based on Foata normal form. 40/24746 useless extension candidates. Maximal degree in co-relation 276969. Up to 14707 conditions per place. [2024-11-08 18:25:36,329 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 1069 selfloop transitions, 1600 changer transitions 6/2676 dead transitions. [2024-11-08 18:25:36,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 2676 transitions, 85463 flow [2024-11-08 18:25:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 18:25:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-08 18:25:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 237 transitions. [2024-11-08 18:25:36,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-11-08 18:25:36,331 INFO L175 Difference]: Start difference. First operand has 425 places, 2274 transitions, 69088 flow. Second operand 22 states and 237 transitions. [2024-11-08 18:25:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 2676 transitions, 85463 flow [2024-11-08 18:26:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 2676 transitions, 84047 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-11-08 18:26:16,031 INFO L231 Difference]: Finished difference. Result has 442 places, 2567 transitions, 82022 flow [2024-11-08 18:26:16,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=67865, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=82022, PETRI_PLACES=442, PETRI_TRANSITIONS=2567} [2024-11-08 18:26:16,034 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 415 predicate places. [2024-11-08 18:26:16,034 INFO L471 AbstractCegarLoop]: Abstraction has has 442 places, 2567 transitions, 82022 flow [2024-11-08 18:26:16,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:26:16,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:26:16,035 INFO L204 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] [2024-11-08 18:26:16,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 18:26:16,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:26:16,236 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 18:26:16,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:26:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -966509743, now seen corresponding path program 14 times [2024-11-08 18:26:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:26:16,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548651412] [2024-11-08 18:26:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:26:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:26:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:26:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:26:16,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:26:16,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548651412] [2024-11-08 18:26:16,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548651412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:26:16,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044683626] [2024-11-08 18:26:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:26:16,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:26:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:26:16,410 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:26:16,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5dd0e68-18b3-4b6d-bb8c-248725a78642/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 18:26:16,479 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:26:16,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:26:16,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:26:16,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:26:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:26:16,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:26:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:26:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044683626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:26:16,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:26:16,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-08 18:26:16,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138194938] [2024-11-08 18:26:16,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:26:16,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 18:26:16,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:26:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 18:26:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:26:16,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 18:26:16,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 2567 transitions, 82022 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 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) [2024-11-08 18:26:16,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:26:16,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 18:26:16,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand