./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:47,306 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:47,428 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:47,440 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:47,440 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:47,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:47,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:47,479 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:47,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:47,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:47,487 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:47,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:47,488 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:47,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:47,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:47,491 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:47,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:47,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:47,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:47,493 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:47,493 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:47,494 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:47,494 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:47,495 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:47,495 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:47,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:47,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:47,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:47,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:47,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:47,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:47,500 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:47,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:47,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:47,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:47,501 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:47,502 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:47,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:47,502 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:47,503 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_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad [2023-11-06 21:14:47,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:47,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:47,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:47,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:47,863 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:47,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-06 21:14:50,898 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:51,184 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:51,185 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-06 21:14:51,201 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/data/61239e94b/bbb61b7fb609429a97e10c6758fab550/FLAGd79301e10 [2023-11-06 21:14:51,220 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/data/61239e94b/bbb61b7fb609429a97e10c6758fab550 [2023-11-06 21:14:51,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:51,228 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:51,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:51,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:51,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:51,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc3f4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51, skipping insertion in model container [2023-11-06 21:14:51,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,279 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:51,532 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2023-11-06 21:14:51,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:51,559 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:51,589 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2023-11-06 21:14:51,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:51,611 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:51,612 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:14:51,618 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:51,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51 WrapperNode [2023-11-06 21:14:51,619 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:51,620 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:51,620 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:51,620 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:51,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,639 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,673 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 239 [2023-11-06 21:14:51,673 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:51,674 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:51,674 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:51,674 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:51,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,714 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,746 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,751 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:51,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:51,756 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:51,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:51,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (1/1) ... [2023-11-06 21:14:51,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:51,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:51,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:51,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:14:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:14:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:14:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:14:51,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:14:51,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:14:51,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:14:51,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 21:14:51,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 21:14:51,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:51,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:14:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:14:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:14:51,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:51,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:51,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:14:51,890 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:14:52,062 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:52,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:52,630 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:52,753 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:52,754 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 21:14:52,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:52 BoogieIcfgContainer [2023-11-06 21:14:52,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:52,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:52,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:52,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:52,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:51" (1/3) ... [2023-11-06 21:14:52,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7c6bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:52, skipping insertion in model container [2023-11-06 21:14:52,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:51" (2/3) ... [2023-11-06 21:14:52,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7c6bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:52, skipping insertion in model container [2023-11-06 21:14:52,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:52" (3/3) ... [2023-11-06 21:14:52,767 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2023-11-06 21:14:52,776 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:14:52,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:52,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:52,787 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:14:52,894 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 21:14:52,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 321 transitions, 663 flow [2023-11-06 21:14:53,079 INFO L124 PetriNetUnfolderBase]: 27/318 cut-off events. [2023-11-06 21:14:53,080 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:14:53,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 27/318 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 232 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 249. Up to 2 conditions per place. [2023-11-06 21:14:53,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 321 transitions, 663 flow [2023-11-06 21:14:53,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 307 transitions, 632 flow [2023-11-06 21:14:53,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:14:53,126 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 307 transitions, 632 flow [2023-11-06 21:14:53,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 307 transitions, 632 flow [2023-11-06 21:14:53,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 307 transitions, 632 flow [2023-11-06 21:14:53,295 INFO L124 PetriNetUnfolderBase]: 27/307 cut-off events. [2023-11-06 21:14:53,295 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:14:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 307 events. 27/307 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 249. Up to 2 conditions per place. [2023-11-06 21:14:53,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2023-11-06 21:15:04,821 INFO L134 LiptonReduction]: Checked pairs total: 4170 [2023-11-06 21:15:04,822 INFO L136 LiptonReduction]: Total number of compositions: 341 [2023-11-06 21:15:04,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:15:04,844 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@507997e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:15:04,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 21:15:04,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:15:04,853 INFO L124 PetriNetUnfolderBase]: 8/34 cut-off events. [2023-11-06 21:15:04,853 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:15:04,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:04,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:04,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:04,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:04,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1258296860, now seen corresponding path program 1 times [2023-11-06 21:15:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802414311] [2023-11-06 21:15:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:04,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:05,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:05,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802414311] [2023-11-06 21:15:05,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802414311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:05,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:05,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:15:05,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290377869] [2023-11-06 21:15:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:05,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:05,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 662 [2023-11-06 21:15:05,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:05,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:05,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 662 [2023-11-06 21:15:05,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:06,176 INFO L124 PetriNetUnfolderBase]: 765/1028 cut-off events. [2023-11-06 21:15:06,177 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-06 21:15:06,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 1028 events. 765/1028 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3648 event pairs, 352 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 1824. Up to 1002 conditions per place. [2023-11-06 21:15:06,189 INFO L140 encePairwiseOnDemand]: 659/662 looper letters, 31 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-06 21:15:06,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 156 flow [2023-11-06 21:15:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:15:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2023-11-06 21:15:06,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310171198388721 [2023-11-06 21:15:06,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2023-11-06 21:15:06,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2023-11-06 21:15:06,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:06,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2023-11-06 21:15:06,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:06,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 662.0) internal successors, (2648), 4 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:06,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 662.0) internal successors, (2648), 4 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:06,263 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 88 flow. Second operand 3 states and 856 transitions. [2023-11-06 21:15:06,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 156 flow [2023-11-06 21:15:06,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 21:15:06,275 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 88 flow [2023-11-06 21:15:06,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2023-11-06 21:15:06,284 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-06 21:15:06,285 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 88 flow [2023-11-06 21:15:06,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:06,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:06,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:06,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:15:06,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:06,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:06,302 INFO L85 PathProgramCache]: Analyzing trace with hash 899510902, now seen corresponding path program 1 times [2023-11-06 21:15:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:06,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797327243] [2023-11-06 21:15:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:15:06,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797327243] [2023-11-06 21:15:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797327243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:06,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:06,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:06,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356094368] [2023-11-06 21:15:06,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:06,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:06,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:06,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:15:06,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 662 [2023-11-06 21:15:06,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:06,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:06,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 662 [2023-11-06 21:15:06,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:07,053 INFO L124 PetriNetUnfolderBase]: 765/1030 cut-off events. [2023-11-06 21:15:07,053 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 21:15:07,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 1030 events. 765/1030 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3653 event pairs, 352 based on Foata normal form. 0/596 useless extension candidates. Maximal degree in co-relation 2061. Up to 1001 conditions per place. [2023-11-06 21:15:07,063 INFO L140 encePairwiseOnDemand]: 655/662 looper letters, 29 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-11-06 21:15:07,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 162 flow [2023-11-06 21:15:07,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:15:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1133 transitions. [2023-11-06 21:15:07,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278700906344411 [2023-11-06 21:15:07,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1133 transitions. [2023-11-06 21:15:07,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1133 transitions. [2023-11-06 21:15:07,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:07,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1133 transitions. [2023-11-06 21:15:07,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 662.0) internal successors, (3310), 5 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,085 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 662.0) internal successors, (3310), 5 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,086 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 88 flow. Second operand 4 states and 1133 transitions. [2023-11-06 21:15:07,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 162 flow [2023-11-06 21:15:07,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 158 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:15:07,088 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 112 flow [2023-11-06 21:15:07,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-06 21:15:07,090 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-11-06 21:15:07,090 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 112 flow [2023-11-06 21:15:07,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:07,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:07,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:15:07,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:07,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:07,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1768778455, now seen corresponding path program 1 times [2023-11-06 21:15:07,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:07,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460031180] [2023-11-06 21:15:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:07,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:15:07,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:07,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460031180] [2023-11-06 21:15:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460031180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:07,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:07,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:15:07,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266890659] [2023-11-06 21:15:07,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:07,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:07,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:07,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 662 [2023-11-06 21:15:07,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:07,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 662 [2023-11-06 21:15:07,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:07,666 INFO L124 PetriNetUnfolderBase]: 1449/1926 cut-off events. [2023-11-06 21:15:07,666 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 21:15:07,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3898 conditions, 1926 events. 1449/1926 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7624 event pairs, 303 based on Foata normal form. 1/1154 useless extension candidates. Maximal degree in co-relation 3878. Up to 1172 conditions per place. [2023-11-06 21:15:07,685 INFO L140 encePairwiseOnDemand]: 657/662 looper letters, 53 selfloop transitions, 4 changer transitions 1/61 dead transitions. [2023-11-06 21:15:07,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 61 transitions, 279 flow [2023-11-06 21:15:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:15:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 914 transitions. [2023-11-06 21:15:07,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602215508559919 [2023-11-06 21:15:07,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 914 transitions. [2023-11-06 21:15:07,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 914 transitions. [2023-11-06 21:15:07,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:07,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 914 transitions. [2023-11-06 21:15:07,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 662.0) internal successors, (2648), 4 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 662.0) internal successors, (2648), 4 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,753 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 112 flow. Second operand 3 states and 914 transitions. [2023-11-06 21:15:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 61 transitions, 279 flow [2023-11-06 21:15:07,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 61 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:15:07,758 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 137 flow [2023-11-06 21:15:07,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2023-11-06 21:15:07,760 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-11-06 21:15:07,765 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 137 flow [2023-11-06 21:15:07,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:07,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:07,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:07,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:15:07,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:07,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -943465240, now seen corresponding path program 1 times [2023-11-06 21:15:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:07,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53841912] [2023-11-06 21:15:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53841912] [2023-11-06 21:15:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53841912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048226549] [2023-11-06 21:15:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:08,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:08,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:08,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:15:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:08,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:15:08,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:08,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048226549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:08,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:08,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 21:15:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47772414] [2023-11-06 21:15:08,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:08,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:15:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:15:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:15:08,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 662 [2023-11-06 21:15:09,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 137 flow. Second operand has 12 states, 12 states have (on average 266.9166666666667) internal successors, (3203), 12 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:09,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:09,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 662 [2023-11-06 21:15:09,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:09,809 INFO L124 PetriNetUnfolderBase]: 2228/3077 cut-off events. [2023-11-06 21:15:09,810 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-11-06 21:15:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6767 conditions, 3077 events. 2228/3077 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13909 event pairs, 790 based on Foata normal form. 0/2128 useless extension candidates. Maximal degree in co-relation 4085. Up to 1468 conditions per place. [2023-11-06 21:15:09,837 INFO L140 encePairwiseOnDemand]: 651/662 looper letters, 90 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-11-06 21:15:09,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 564 flow [2023-11-06 21:15:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:15:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 21:15:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2477 transitions. [2023-11-06 21:15:09,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41574353810003356 [2023-11-06 21:15:09,849 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2477 transitions. [2023-11-06 21:15:09,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2477 transitions. [2023-11-06 21:15:09,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:09,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2477 transitions. [2023-11-06 21:15:09,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.22222222222223) internal successors, (2477), 9 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:09,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 662.0) internal successors, (6620), 10 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:09,882 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 662.0) internal successors, (6620), 10 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:09,883 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 137 flow. Second operand 9 states and 2477 transitions. [2023-11-06 21:15:09,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 564 flow [2023-11-06 21:15:09,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 110 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:15:09,888 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 256 flow [2023-11-06 21:15:09,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2023-11-06 21:15:09,889 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2023-11-06 21:15:09,890 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 256 flow [2023-11-06 21:15:09,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 266.9166666666667) internal successors, (3203), 12 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:09,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:09,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:09,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:10,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:10,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:10,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1940340561, now seen corresponding path program 1 times [2023-11-06 21:15:10,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:10,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393517606] [2023-11-06 21:15:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:10,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:10,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:10,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393517606] [2023-11-06 21:15:10,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393517606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:10,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567626505] [2023-11-06 21:15:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:10,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:10,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:10,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:15:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:10,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:15:10,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:10,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:15:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567626505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:10,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:15:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 21:15:10,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930330397] [2023-11-06 21:15:10,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:15:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:15:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:15:11,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 662 [2023-11-06 21:15:11,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 256 flow. Second operand has 12 states, 12 states have (on average 266.0) internal successors, (3192), 12 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:11,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:11,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 662 [2023-11-06 21:15:11,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:11,967 INFO L124 PetriNetUnfolderBase]: 1517/2116 cut-off events. [2023-11-06 21:15:11,968 INFO L125 PetriNetUnfolderBase]: For 319/330 co-relation queries the response was YES. [2023-11-06 21:15:11,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5142 conditions, 2116 events. 1517/2116 cut-off events. For 319/330 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8805 event pairs, 810 based on Foata normal form. 11/1496 useless extension candidates. Maximal degree in co-relation 4601. Up to 1843 conditions per place. [2023-11-06 21:15:11,990 INFO L140 encePairwiseOnDemand]: 651/662 looper letters, 33 selfloop transitions, 9 changer transitions 34/78 dead transitions. [2023-11-06 21:15:11,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 474 flow [2023-11-06 21:15:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:15:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 21:15:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2178 transitions. [2023-11-06 21:15:12,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112537764350453 [2023-11-06 21:15:12,003 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2178 transitions. [2023-11-06 21:15:12,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2178 transitions. [2023-11-06 21:15:12,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:12,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2178 transitions. [2023-11-06 21:15:12,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 272.25) internal successors, (2178), 8 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:12,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 662.0) internal successors, (5958), 9 states have internal predecessors, (5958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:12,030 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 662.0) internal successors, (5958), 9 states have internal predecessors, (5958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:12,030 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 256 flow. Second operand 8 states and 2178 transitions. [2023-11-06 21:15:12,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 474 flow [2023-11-06 21:15:12,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 453 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-06 21:15:12,040 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 206 flow [2023-11-06 21:15:12,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-11-06 21:15:12,044 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-11-06 21:15:12,048 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 206 flow [2023-11-06 21:15:12,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 266.0) internal successors, (3192), 12 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:12,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:12,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:12,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:12,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:12,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:12,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash -816791603, now seen corresponding path program 2 times [2023-11-06 21:15:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046986784] [2023-11-06 21:15:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:15:12,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:12,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046986784] [2023-11-06 21:15:12,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046986784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076974716] [2023-11-06 21:15:12,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:15:12,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:12,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:12,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:12,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:15:12,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:15:12,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:12,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:15:12,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:15:12,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:15:13,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076974716] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:13,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-06 21:15:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045516443] [2023-11-06 21:15:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:13,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:15:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:13,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:15:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:15:13,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 662 [2023-11-06 21:15:13,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 267.3333333333333) internal successors, (1604), 6 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:13,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:13,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 662 [2023-11-06 21:15:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:13,755 INFO L124 PetriNetUnfolderBase]: 1466/1930 cut-off events. [2023-11-06 21:15:13,756 INFO L125 PetriNetUnfolderBase]: For 431/431 co-relation queries the response was YES. [2023-11-06 21:15:13,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5075 conditions, 1930 events. 1466/1930 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7771 event pairs, 205 based on Foata normal form. 0/1360 useless extension candidates. Maximal degree in co-relation 5035. Up to 1369 conditions per place. [2023-11-06 21:15:13,777 INFO L140 encePairwiseOnDemand]: 655/662 looper letters, 48 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2023-11-06 21:15:13,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 363 flow [2023-11-06 21:15:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:15:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1627 transitions. [2023-11-06 21:15:13,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096173212487412 [2023-11-06 21:15:13,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1627 transitions. [2023-11-06 21:15:13,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1627 transitions. [2023-11-06 21:15:13,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:13,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1627 transitions. [2023-11-06 21:15:13,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 271.1666666666667) internal successors, (1627), 6 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:13,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 662.0) internal successors, (4634), 7 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:13,807 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 662.0) internal successors, (4634), 7 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:13,808 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 206 flow. Second operand 6 states and 1627 transitions. [2023-11-06 21:15:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 363 flow [2023-11-06 21:15:13,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 313 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-06 21:15:13,826 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 202 flow [2023-11-06 21:15:13,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-06 21:15:13,829 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2023-11-06 21:15:13,830 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 202 flow [2023-11-06 21:15:13,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 267.3333333333333) internal successors, (1604), 6 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:13,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:13,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:13,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:14,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:14,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1909693522, now seen corresponding path program 2 times [2023-11-06 21:15:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448419885] [2023-11-06 21:15:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:14,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:14,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448419885] [2023-11-06 21:15:14,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448419885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:14,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416926345] [2023-11-06 21:15:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:15:14,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:14,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:14,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:15:14,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:15:14,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:15:14,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:15:14,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:14,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:14,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416926345] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:14,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:14,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-06 21:15:14,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057638869] [2023-11-06 21:15:14,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:14,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:15:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:15:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:15:14,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 662 [2023-11-06 21:15:14,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 267.5) internal successors, (1605), 6 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:14,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:14,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 662 [2023-11-06 21:15:14,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:15,282 INFO L124 PetriNetUnfolderBase]: 1541/2080 cut-off events. [2023-11-06 21:15:15,283 INFO L125 PetriNetUnfolderBase]: For 974/1100 co-relation queries the response was YES. [2023-11-06 21:15:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5191 conditions, 2080 events. 1541/2080 cut-off events. For 974/1100 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8133 event pairs, 626 based on Foata normal form. 126/1741 useless extension candidates. Maximal degree in co-relation 5156. Up to 1551 conditions per place. [2023-11-06 21:15:15,303 INFO L140 encePairwiseOnDemand]: 657/662 looper letters, 61 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-11-06 21:15:15,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 416 flow [2023-11-06 21:15:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:15:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1631 transitions. [2023-11-06 21:15:15,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106243705941591 [2023-11-06 21:15:15,311 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1631 transitions. [2023-11-06 21:15:15,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1631 transitions. [2023-11-06 21:15:15,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:15,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1631 transitions. [2023-11-06 21:15:15,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 271.8333333333333) internal successors, (1631), 6 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:15,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 662.0) internal successors, (4634), 7 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:15,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 662.0) internal successors, (4634), 7 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:15,329 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 202 flow. Second operand 6 states and 1631 transitions. [2023-11-06 21:15:15,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 416 flow [2023-11-06 21:15:15,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 402 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 21:15:15,340 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 210 flow [2023-11-06 21:15:15,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-06 21:15:15,341 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2023-11-06 21:15:15,341 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 210 flow [2023-11-06 21:15:15,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 267.5) internal successors, (1605), 6 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:15,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:15,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:15,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:15,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:15:15,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:15,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1046161655, now seen corresponding path program 1 times [2023-11-06 21:15:15,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:15,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076933036] [2023-11-06 21:15:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:15,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:15,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076933036] [2023-11-06 21:15:15,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076933036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173583565] [2023-11-06 21:15:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:15,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:15,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:15,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:15:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:15,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:15:15,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:16,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:16,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173583565] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:16,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:16,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-06 21:15:16,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032489569] [2023-11-06 21:15:16,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:16,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:15:16,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:15:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:15:16,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 662 [2023-11-06 21:15:16,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 268.6666666666667) internal successors, (1612), 6 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:16,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:15:16,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 662 [2023-11-06 21:15:16,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:15:16,647 INFO L124 PetriNetUnfolderBase]: 1181/1619 cut-off events. [2023-11-06 21:15:16,647 INFO L125 PetriNetUnfolderBase]: For 712/935 co-relation queries the response was YES. [2023-11-06 21:15:16,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 1619 events. 1181/1619 cut-off events. For 712/935 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5868 event pairs, 382 based on Foata normal form. 303/1572 useless extension candidates. Maximal degree in co-relation 4410. Up to 855 conditions per place. [2023-11-06 21:15:16,667 INFO L140 encePairwiseOnDemand]: 655/662 looper letters, 58 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2023-11-06 21:15:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 419 flow [2023-11-06 21:15:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:15:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1636 transitions. [2023-11-06 21:15:16,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118831822759315 [2023-11-06 21:15:16,675 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1636 transitions. [2023-11-06 21:15:16,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1636 transitions. [2023-11-06 21:15:16,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:15:16,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1636 transitions. [2023-11-06 21:15:16,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.6666666666667) internal successors, (1636), 6 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:16,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 662.0) internal successors, (4634), 7 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:16,692 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 662.0) internal successors, (4634), 7 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:16,693 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 210 flow. Second operand 6 states and 1636 transitions. [2023-11-06 21:15:16,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 419 flow [2023-11-06 21:15:16,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 406 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 21:15:16,703 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 237 flow [2023-11-06 21:15:16,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=662, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-06 21:15:16,708 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-11-06 21:15:16,708 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 237 flow [2023-11-06 21:15:16,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 268.6666666666667) internal successors, (1612), 6 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:16,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:15:16,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:16,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:16,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:15:16,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:15:16,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash 684363430, now seen corresponding path program 1 times [2023-11-06 21:15:16,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793439625] [2023-11-06 21:15:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:16,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 21:15:20,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793439625] [2023-11-06 21:15:20,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793439625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:20,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141574188] [2023-11-06 21:15:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:20,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:20,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:20,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:20,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a3f769-c61d-44b0-90c9-f6cb5d29fb82/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:15:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:20,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 21:15:20,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:20,648 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:15:20,801 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 21:15:20,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 21:15:21,004 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:21,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-06 21:15:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:21,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 21:15:21,938 INFO L322 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2023-11-06 21:15:21,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 39 [2023-11-06 21:15:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:15:22,592 INFO L322 Elim1Store]: treesize reduction 56, result has 32.5 percent of original size [2023-11-06 21:15:22,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 113 treesize of output 119 [2023-11-06 21:15:28,212 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:15:28,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 435 treesize of output 1429