./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:33:17,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:33:17,641 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:33:17,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:33:17,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:33:17,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:33:17,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:33:17,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:33:17,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:33:17,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:33:17,701 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:33:17,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:33:17,703 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:33:17,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:33:17,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:33:17,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:33:17,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:33:17,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:33:17,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:33:17,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:33:17,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:33:17,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:33:17,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:33:17,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:33:17,709 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:33:17,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:33:17,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:33:17,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:33:17,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:17,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:33:17,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:33:17,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:33:17,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:33:17,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:33:17,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:33:17,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:33:17,715 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:33:17,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:33:17,715 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:33:17,716 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_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2023-11-12 02:33:18,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:33:18,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:33:18,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:33:18,087 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:33:18,088 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:33:18,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2023-11-12 02:33:21,319 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:33:21,573 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:33:21,574 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2023-11-12 02:33:21,584 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/data/348899046/121d42534d0a4264b8ee7134b56db423/FLAG8fb3962cc [2023-11-12 02:33:21,599 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/data/348899046/121d42534d0a4264b8ee7134b56db423 [2023-11-12 02:33:21,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:33:21,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:33:21,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:21,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:33:21,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:33:21,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:21,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bd95c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21, skipping insertion in model container [2023-11-12 02:33:21,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:21,650 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:33:21,847 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_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3694,3707] [2023-11-12 02:33:21,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:21,872 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:33:21,909 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_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3694,3707] [2023-11-12 02:33:21,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:21,937 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:33:21,938 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:33:21,947 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:33:21,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21 WrapperNode [2023-11-12 02:33:21,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:21,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:21,950 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:33:21,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:33:21,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:21,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,012 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 315 [2023-11-12 02:33:22,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:22,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:33:22,013 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:33:22,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:33:22,022 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,042 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,051 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:33:22,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:33:22,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:33:22,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:33:22,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:22,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:33:22,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:33:22,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:33:22,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:33:22,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:33:22,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:33:22,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:33:22,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:33:22,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:33:22,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:33:22,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:33:22,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:33:22,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:33:22,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:33:22,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:33:22,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:33:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:33:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:33:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:33:22,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:33:22,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:33:22,173 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:33:22,310 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:33:22,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:33:22,974 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:33:23,313 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:33:23,313 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 02:33:23,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:23 BoogieIcfgContainer [2023-11-12 02:33:23,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:33:23,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:33:23,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:33:23,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:33:23,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:33:21" (1/3) ... [2023-11-12 02:33:23,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716d5dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:23, skipping insertion in model container [2023-11-12 02:33:23,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (2/3) ... [2023-11-12 02:33:23,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716d5dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:23, skipping insertion in model container [2023-11-12 02:33:23,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:23" (3/3) ... [2023-11-12 02:33:23,334 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-11-12 02:33:23,344 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:33:23,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:33:23,356 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:33:23,356 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:33:23,467 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:33:23,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 221 transitions, 470 flow [2023-11-12 02:33:23,662 INFO L124 PetriNetUnfolderBase]: 15/217 cut-off events. [2023-11-12 02:33:23,662 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:33:23,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 217 events. 15/217 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 175. Up to 2 conditions per place. [2023-11-12 02:33:23,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 221 transitions, 470 flow [2023-11-12 02:33:23,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 204 transitions, 432 flow [2023-11-12 02:33:23,692 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:33:23,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 204 transitions, 432 flow [2023-11-12 02:33:23,710 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 204 transitions, 432 flow [2023-11-12 02:33:23,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 204 transitions, 432 flow [2023-11-12 02:33:23,772 INFO L124 PetriNetUnfolderBase]: 15/204 cut-off events. [2023-11-12 02:33:23,772 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:33:23,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 204 events. 15/204 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 142 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 175. Up to 2 conditions per place. [2023-11-12 02:33:23,778 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2023-11-12 02:33:34,752 INFO L134 LiptonReduction]: Checked pairs total: 5253 [2023-11-12 02:33:34,752 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-11-12 02:33:34,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:34,799 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45d4a7db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:34,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:33:34,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:33:34,831 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-11-12 02:33:34,831 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:33:34,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:34,834 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] [2023-11-12 02:33:34,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:33:34,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1975734847, now seen corresponding path program 1 times [2023-11-12 02:33:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:34,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604907389] [2023-11-12 02:33:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:35,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:35,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604907389] [2023-11-12 02:33:35,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604907389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:35,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:35,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:35,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750866211] [2023-11-12 02:33:35,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:35,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:35,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:35,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:35,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 425 [2023-11-12 02:33:35,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:35,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:35,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 425 [2023-11-12 02:33:35,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:36,358 INFO L124 PetriNetUnfolderBase]: 4382/5585 cut-off events. [2023-11-12 02:33:36,358 INFO L125 PetriNetUnfolderBase]: For 296/296 co-relation queries the response was YES. [2023-11-12 02:33:36,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11503 conditions, 5585 events. 4382/5585 cut-off events. For 296/296 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 24037 event pairs, 656 based on Foata normal form. 1/3759 useless extension candidates. Maximal degree in co-relation 9316. Up to 4602 conditions per place. [2023-11-12 02:33:36,419 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 51 selfloop transitions, 5 changer transitions 1/61 dead transitions. [2023-11-12 02:33:36,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 281 flow [2023-11-12 02:33:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-11-12 02:33:36,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49254901960784314 [2023-11-12 02:33:36,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-11-12 02:33:36,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-11-12 02:33:36,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:36,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-11-12 02:33:36,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,474 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 94 flow. Second operand 3 states and 628 transitions. [2023-11-12 02:33:36,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 281 flow [2023-11-12 02:33:36,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 251 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-12 02:33:36,490 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 111 flow [2023-11-12 02:33:36,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-11-12 02:33:36,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-11-12 02:33:36,496 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 111 flow [2023-11-12 02:33:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:36,498 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] [2023-11-12 02:33:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:33:36,498 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 2 more)] === [2023-11-12 02:33:36,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:36,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1214281547, now seen corresponding path program 1 times [2023-11-12 02:33:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:36,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713671169] [2023-11-12 02:33:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:36,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713671169] [2023-11-12 02:33:36,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713671169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:36,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:36,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851891568] [2023-11-12 02:33:36,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:36,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:36,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:36,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-11-12 02:33:36,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:36,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:36,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-11-12 02:33:36,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:38,032 INFO L124 PetriNetUnfolderBase]: 5147/6783 cut-off events. [2023-11-12 02:33:38,032 INFO L125 PetriNetUnfolderBase]: For 995/995 co-relation queries the response was YES. [2023-11-12 02:33:38,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15325 conditions, 6783 events. 5147/6783 cut-off events. For 995/995 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32075 event pairs, 3005 based on Foata normal form. 1/4772 useless extension candidates. Maximal degree in co-relation 2011. Up to 5237 conditions per place. [2023-11-12 02:33:38,083 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 34 selfloop transitions, 2 changer transitions 26/66 dead transitions. [2023-11-12 02:33:38,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 310 flow [2023-11-12 02:33:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:33:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:33:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 799 transitions. [2023-11-12 02:33:38,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-12 02:33:38,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 799 transitions. [2023-11-12 02:33:38,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 799 transitions. [2023-11-12 02:33:38,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:38,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 799 transitions. [2023-11-12 02:33:38,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,105 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,105 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 111 flow. Second operand 4 states and 799 transitions. [2023-11-12 02:33:38,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 310 flow [2023-11-12 02:33:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:38,118 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 124 flow [2023-11-12 02:33:38,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-11-12 02:33:38,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-12 02:33:38,120 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 124 flow [2023-11-12 02:33:38,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:38,121 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, 1] [2023-11-12 02:33:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:33:38,121 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 2 more)] === [2023-11-12 02:33:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1000722353, now seen corresponding path program 1 times [2023-11-12 02:33:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438677416] [2023-11-12 02:33:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:38,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438677416] [2023-11-12 02:33:38,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438677416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:38,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389672536] [2023-11-12 02:33:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:38,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:38,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:38,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:38,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:33:38,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:38,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:38,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389672536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:38,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-12 02:33:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136440607] [2023-11-12 02:33:38,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:33:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:33:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:33:38,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 425 [2023-11-12 02:33:38,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 185.3) internal successors, (1853), 10 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:38,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:38,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 425 [2023-11-12 02:33:38,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:40,096 INFO L124 PetriNetUnfolderBase]: 5147/6785 cut-off events. [2023-11-12 02:33:40,096 INFO L125 PetriNetUnfolderBase]: For 2109/2109 co-relation queries the response was YES. [2023-11-12 02:33:40,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15755 conditions, 6785 events. 5147/6785 cut-off events. For 2109/2109 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 32026 event pairs, 3005 based on Foata normal form. 297/5930 useless extension candidates. Maximal degree in co-relation 15742. Up to 5236 conditions per place. [2023-11-12 02:33:40,161 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 59 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-11-12 02:33:40,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 334 flow [2023-11-12 02:33:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1152 transitions. [2023-11-12 02:33:40,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45176470588235296 [2023-11-12 02:33:40,167 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1152 transitions. [2023-11-12 02:33:40,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1152 transitions. [2023-11-12 02:33:40,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:40,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1152 transitions. [2023-11-12 02:33:40,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:40,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:40,182 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:40,183 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 124 flow. Second operand 6 states and 1152 transitions. [2023-11-12 02:33:40,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 334 flow [2023-11-12 02:33:40,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 326 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:40,187 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 159 flow [2023-11-12 02:33:40,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-12 02:33:40,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-11-12 02:33:40,189 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 159 flow [2023-11-12 02:33:40,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 185.3) internal successors, (1853), 10 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:40,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:40,232 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, 1] [2023-11-12 02:33:40,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:33:40,433 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 2 more)] === [2023-11-12 02:33:40,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1168440926, now seen corresponding path program 1 times [2023-11-12 02:33:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:40,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700272365] [2023-11-12 02:33:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:40,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:40,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700272365] [2023-11-12 02:33:40,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700272365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:40,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144989839] [2023-11-12 02:33:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:40,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:40,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:40,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:40,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:33:40,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:40,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144989839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:41,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:41,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-12 02:33:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468340599] [2023-11-12 02:33:41,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:41,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:33:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:33:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:33:41,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 425 [2023-11-12 02:33:41,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 159 flow. Second operand has 10 states, 10 states have (on average 185.9) internal successors, (1859), 10 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:41,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:41,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 425 [2023-11-12 02:33:41,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:42,062 INFO L124 PetriNetUnfolderBase]: 4241/5551 cut-off events. [2023-11-12 02:33:42,062 INFO L125 PetriNetUnfolderBase]: For 3308/3308 co-relation queries the response was YES. [2023-11-12 02:33:42,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13927 conditions, 5551 events. 4241/5551 cut-off events. For 3308/3308 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24748 event pairs, 2379 based on Foata normal form. 0/4701 useless extension candidates. Maximal degree in co-relation 13453. Up to 5236 conditions per place. [2023-11-12 02:33:42,105 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 33 selfloop transitions, 4 changer transitions 20/61 dead transitions. [2023-11-12 02:33:42,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 313 flow [2023-11-12 02:33:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1147 transitions. [2023-11-12 02:33:42,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498039215686275 [2023-11-12 02:33:42,114 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1147 transitions. [2023-11-12 02:33:42,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1147 transitions. [2023-11-12 02:33:42,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:42,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1147 transitions. [2023-11-12 02:33:42,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.16666666666666) internal successors, (1147), 6 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:42,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:42,129 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:42,129 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 159 flow. Second operand 6 states and 1147 transitions. [2023-11-12 02:33:42,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 313 flow [2023-11-12 02:33:42,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 298 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-12 02:33:42,134 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 142 flow [2023-11-12 02:33:42,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-12 02:33:42,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-11-12 02:33:42,137 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 142 flow [2023-11-12 02:33:42,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 185.9) internal successors, (1859), 10 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:42,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:42,140 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-11-12 02:33:42,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:42,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:42,345 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 2 more)] === [2023-11-12 02:33:42,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:42,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2036122121, now seen corresponding path program 2 times [2023-11-12 02:33:42,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:42,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974505220] [2023-11-12 02:33:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:42,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:33:42,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:42,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974505220] [2023-11-12 02:33:42,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974505220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:42,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802443894] [2023-11-12 02:33:42,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:33:42,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:42,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:42,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:42,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:33:42,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:33:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:42,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:33:42,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:43,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:43,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802443894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:43,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:43,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-11-12 02:33:43,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420538701] [2023-11-12 02:33:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:43,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:33:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:33:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:33:43,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 425 [2023-11-12 02:33:43,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 186.4) internal successors, (1864), 10 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:43,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:43,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 425 [2023-11-12 02:33:43,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:45,777 INFO L124 PetriNetUnfolderBase]: 10969/13893 cut-off events. [2023-11-12 02:33:45,777 INFO L125 PetriNetUnfolderBase]: For 4262/4262 co-relation queries the response was YES. [2023-11-12 02:33:45,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35295 conditions, 13893 events. 10969/13893 cut-off events. For 4262/4262 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 62626 event pairs, 339 based on Foata normal form. 3/13886 useless extension candidates. Maximal degree in co-relation 35265. Up to 4971 conditions per place. [2023-11-12 02:33:45,896 INFO L140 encePairwiseOnDemand]: 417/425 looper letters, 129 selfloop transitions, 21 changer transitions 4/158 dead transitions. [2023-11-12 02:33:45,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 158 transitions, 801 flow [2023-11-12 02:33:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:33:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:33:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1933 transitions. [2023-11-12 02:33:45,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548235294117647 [2023-11-12 02:33:45,906 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1933 transitions. [2023-11-12 02:33:45,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1933 transitions. [2023-11-12 02:33:45,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:45,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1933 transitions. [2023-11-12 02:33:45,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.3) internal successors, (1933), 10 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:45,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 425.0) internal successors, (4675), 11 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:45,924 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 425.0) internal successors, (4675), 11 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:45,924 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 142 flow. Second operand 10 states and 1933 transitions. [2023-11-12 02:33:45,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 158 transitions, 801 flow [2023-11-12 02:33:45,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 158 transitions, 789 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:33:45,930 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 304 flow [2023-11-12 02:33:45,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=304, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-11-12 02:33:45,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2023-11-12 02:33:45,933 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 304 flow [2023-11-12 02:33:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 186.4) internal successors, (1864), 10 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:45,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:45,935 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2023-11-12 02:33:45,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:46,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:46,142 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 2 more)] === [2023-11-12 02:33:46,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:46,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1915066236, now seen corresponding path program 1 times [2023-11-12 02:33:46,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:46,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674457880] [2023-11-12 02:33:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:46,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674457880] [2023-11-12 02:33:47,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674457880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834648282] [2023-11-12 02:33:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:47,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:47,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:33:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:47,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:33:47,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:48,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 02:33:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:33:48,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:48,606 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:33:48,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-12 02:33:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:48,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834648282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:48,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:48,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 23 [2023-11-12 02:33:48,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786454031] [2023-11-12 02:33:48,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:33:48,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:33:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:33:50,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 425 [2023-11-12 02:33:50,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 304 flow. Second operand has 24 states, 24 states have (on average 162.45833333333334) internal successors, (3899), 24 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:50,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:50,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 425 [2023-11-12 02:33:50,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:55,254 INFO L124 PetriNetUnfolderBase]: 19201/24758 cut-off events. [2023-11-12 02:33:55,254 INFO L125 PetriNetUnfolderBase]: For 42844/42856 co-relation queries the response was YES. [2023-11-12 02:33:55,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79790 conditions, 24758 events. 19201/24758 cut-off events. For 42844/42856 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 126574 event pairs, 1249 based on Foata normal form. 4/24752 useless extension candidates. Maximal degree in co-relation 79755. Up to 16151 conditions per place. [2023-11-12 02:33:55,490 INFO L140 encePairwiseOnDemand]: 411/425 looper letters, 292 selfloop transitions, 220 changer transitions 5/521 dead transitions. [2023-11-12 02:33:55,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 521 transitions, 3323 flow [2023-11-12 02:33:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 02:33:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-12 02:33:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5049 transitions. [2023-11-12 02:33:55,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096551724137931 [2023-11-12 02:33:55,510 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5049 transitions. [2023-11-12 02:33:55,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5049 transitions. [2023-11-12 02:33:55,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:55,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5049 transitions. [2023-11-12 02:33:55,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 174.10344827586206) internal successors, (5049), 29 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 425.0) internal successors, (12750), 30 states have internal predecessors, (12750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,560 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 425.0) internal successors, (12750), 30 states have internal predecessors, (12750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,560 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 304 flow. Second operand 29 states and 5049 transitions. [2023-11-12 02:33:55,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 521 transitions, 3323 flow [2023-11-12 02:33:55,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 521 transitions, 3087 flow, removed 116 selfloop flow, removed 3 redundant places. [2023-11-12 02:33:55,851 INFO L231 Difference]: Finished difference. Result has 88 places, 289 transitions, 2175 flow [2023-11-12 02:33:55,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2175, PETRI_PLACES=88, PETRI_TRANSITIONS=289} [2023-11-12 02:33:55,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2023-11-12 02:33:55,853 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 289 transitions, 2175 flow [2023-11-12 02:33:55,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.45833333333334) internal successors, (3899), 24 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:55,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:55,855 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2023-11-12 02:33:55,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:56,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:33:56,062 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 2 more)] === [2023-11-12 02:33:56,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:56,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2121580679, now seen corresponding path program 1 times [2023-11-12 02:33:56,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:56,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451604430] [2023-11-12 02:33:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:56,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451604430] [2023-11-12 02:33:56,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451604430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:56,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13573458] [2023-11-12 02:33:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:56,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:56,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be8f80ee-c5c2-4166-b5a4-bfe70a8b4f9a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:33:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:56,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:33:56,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:57,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 02:33:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:33:57,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:33:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13573458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:57,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:57,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 17 [2023-11-12 02:33:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369426298] [2023-11-12 02:33:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:33:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:33:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:33:57,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 425 [2023-11-12 02:33:57,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 289 transitions, 2175 flow. Second operand has 18 states, 18 states have (on average 173.5) internal successors, (3123), 18 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:57,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:57,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 425 [2023-11-12 02:33:57,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:34:03,541 INFO L124 PetriNetUnfolderBase]: 25254/32711 cut-off events. [2023-11-12 02:34:03,541 INFO L125 PetriNetUnfolderBase]: For 68142/68188 co-relation queries the response was YES. [2023-11-12 02:34:03,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116682 conditions, 32711 events. 25254/32711 cut-off events. For 68142/68188 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 175097 event pairs, 1741 based on Foata normal form. 24/32725 useless extension candidates. Maximal degree in co-relation 116642. Up to 22840 conditions per place. [2023-11-12 02:34:03,878 INFO L140 encePairwiseOnDemand]: 411/425 looper letters, 431 selfloop transitions, 289 changer transitions 5/729 dead transitions. [2023-11-12 02:34:03,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 729 transitions, 5810 flow [2023-11-12 02:34:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:34:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-12 02:34:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4823 transitions. [2023-11-12 02:34:03,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364705882352941 [2023-11-12 02:34:03,909 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4823 transitions. [2023-11-12 02:34:03,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4823 transitions. [2023-11-12 02:34:03,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:34:03,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4823 transitions. [2023-11-12 02:34:03,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 185.5) internal successors, (4823), 26 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:34:03,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 425.0) internal successors, (11475), 27 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:34:03,967 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 425.0) internal successors, (11475), 27 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:34:03,968 INFO L175 Difference]: Start difference. First operand has 88 places, 289 transitions, 2175 flow. Second operand 26 states and 4823 transitions. [2023-11-12 02:34:03,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 729 transitions, 5810 flow