./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/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_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/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_e77e8af3-932b-4778-b19f-f0190e903af6/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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:28:22,573 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:28:22,692 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:28:22,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:28:22,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:28:22,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:28:22,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:28:22,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:28:22,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:28:22,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:28:22,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:28:22,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:28:22,758 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:28:22,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:28:22,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:28:22,761 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:28:22,761 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:28:22,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:28:22,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:28:22,763 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:28:22,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:28:22,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:28:22,765 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:28:22,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:28:22,766 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:28:22,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:28:22,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:28:22,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:28:22,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:22,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:28:22,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:28:22,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:28:22,772 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:28:22,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:28:22,773 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:28:22,773 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:28:22,773 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:28:22,774 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:28:22,774 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:28:22,774 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_e77e8af3-932b-4778-b19f-f0190e903af6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2023-11-12 02:28:23,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:28:23,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:28:23,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:28:23,103 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:28:23,103 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:28:23,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-11-12 02:28:26,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:28:26,633 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:28:26,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-11-12 02:28:26,660 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/data/79d3d188f/b26d07bab2134a21a388b4ada00b415b/FLAG82b7ad5f8 [2023-11-12 02:28:26,674 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/data/79d3d188f/b26d07bab2134a21a388b4ada00b415b [2023-11-12 02:28:26,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:28:26,679 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:28:26,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:26,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:28:26,687 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:28:26,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:26" (1/1) ... [2023-11-12 02:28:26,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f31798a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:26, skipping insertion in model container [2023-11-12 02:28:26,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:26" (1/1) ... [2023-11-12 02:28:26,749 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:28:26,933 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-12 02:28:27,162 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_e77e8af3-932b-4778-b19f-f0190e903af6/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-11-12 02:28:27,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:27,191 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:28:27,237 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-12 02:28:27,283 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_e77e8af3-932b-4778-b19f-f0190e903af6/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-11-12 02:28:27,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:27,337 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:28:27,337 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:28:27,337 WARN L672 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:28:27,346 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:28:27,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27 WrapperNode [2023-11-12 02:28:27,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:27,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:27,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:28:27,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:28:27,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,416 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2023-11-12 02:28:27,417 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:27,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:28:27,418 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:28:27,418 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:28:27,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,473 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,477 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:28:27,478 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:28:27,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:28:27,478 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:28:27,479 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (1/1) ... [2023-11-12 02:28:27,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:27,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:27,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:28:27,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77e8af3-932b-4778-b19f-f0190e903af6/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:28:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:28:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 02:28:27,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 02:28:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:28:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:28:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:28:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:28:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:28:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:28:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:28:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:28:27,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:28:27,553 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 02:28:27,686 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:28:27,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:28:27,903 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:28:28,038 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:28:28,038 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:28:28,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:28 BoogieIcfgContainer [2023-11-12 02:28:28,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:28:28,049 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:28:28,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:28:28,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:28:28,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:28:26" (1/3) ... [2023-11-12 02:28:28,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ee6a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:28, skipping insertion in model container [2023-11-12 02:28:28,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:27" (2/3) ... [2023-11-12 02:28:28,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ee6a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:28, skipping insertion in model container [2023-11-12 02:28:28,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:28" (3/3) ... [2023-11-12 02:28:28,059 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-11-12 02:28:28,069 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:28:28,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:28:28,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 02:28:28,081 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:28:28,151 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:28:28,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 72 transitions, 148 flow [2023-11-12 02:28:28,322 INFO L124 PetriNetUnfolderBase]: 8/111 cut-off events. [2023-11-12 02:28:28,322 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:28,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 111 events. 8/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 213 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-12 02:28:28,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 72 transitions, 148 flow [2023-11-12 02:28:28,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 72 transitions, 148 flow [2023-11-12 02:28:28,337 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:28,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 72 transitions, 148 flow [2023-11-12 02:28:28,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 72 transitions, 148 flow [2023-11-12 02:28:28,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 72 transitions, 148 flow [2023-11-12 02:28:28,378 INFO L124 PetriNetUnfolderBase]: 8/111 cut-off events. [2023-11-12 02:28:28,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:28,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 111 events. 8/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 213 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-12 02:28:28,382 INFO L119 LiptonReduction]: Number of co-enabled transitions 1428 [2023-11-12 02:28:29,982 INFO L134 LiptonReduction]: Checked pairs total: 3882 [2023-11-12 02:28:29,982 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-11-12 02:28:30,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:30,023 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;@4ebb333f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:30,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:28:30,035 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:30,035 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-12 02:28:30,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:30,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:30,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:28:30,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:28:30,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1854603210, now seen corresponding path program 1 times [2023-11-12 02:28:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:30,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309178509] [2023-11-12 02:28:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:30,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:30,204 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:30,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:30,270 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:30,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 02:28:30,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 02:28:30,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 02:28:30,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 02:28:30,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:28:30,277 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 02:28:30,282 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:30,282 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:28:30,327 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:28:30,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 90 transitions, 190 flow [2023-11-12 02:28:30,421 INFO L124 PetriNetUnfolderBase]: 13/170 cut-off events. [2023-11-12 02:28:30,421 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:28:30,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 170 events. 13/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 429 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-11-12 02:28:30,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 90 transitions, 190 flow [2023-11-12 02:28:30,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 90 transitions, 190 flow [2023-11-12 02:28:30,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:30,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 90 transitions, 190 flow [2023-11-12 02:28:30,432 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 90 transitions, 190 flow [2023-11-12 02:28:30,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 90 transitions, 190 flow [2023-11-12 02:28:30,474 INFO L124 PetriNetUnfolderBase]: 13/170 cut-off events. [2023-11-12 02:28:30,475 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:28:30,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 170 events. 13/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 429 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-11-12 02:28:30,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 3468 [2023-11-12 02:28:31,959 INFO L134 LiptonReduction]: Checked pairs total: 10569 [2023-11-12 02:28:31,959 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-11-12 02:28:31,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:31,963 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;@4ebb333f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:31,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:28:31,967 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:31,967 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-12 02:28:31,967 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:28:31,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:31,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:31,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:28:31,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1207289367, now seen corresponding path program 1 times [2023-11-12 02:28:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:31,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547202021] [2023-11-12 02:28:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:31,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:32,170 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 02:28:32,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547202021] [2023-11-12 02:28:32,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547202021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:32,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:32,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:32,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698539453] [2023-11-12 02:28:32,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:32,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:32,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:32,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 149 [2023-11-12 02:28:32,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 02:28:32,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:32,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 149 [2023-11-12 02:28:32,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:32,747 INFO L124 PetriNetUnfolderBase]: 1886/3179 cut-off events. [2023-11-12 02:28:32,747 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-12 02:28:32,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6137 conditions, 3179 events. 1886/3179 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17979 event pairs, 1093 based on Foata normal form. 263/3068 useless extension candidates. Maximal degree in co-relation 3762. Up to 2293 conditions per place. [2023-11-12 02:28:32,771 INFO L140 encePairwiseOnDemand]: 137/149 looper letters, 53 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-12 02:28:32,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 263 flow [2023-11-12 02:28:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-12 02:28:32,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480984340044742 [2023-11-12 02:28:32,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-12 02:28:32,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-12 02:28:32,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:32,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-12 02:28:32,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 02:28:32,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 02:28:32,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 02:28:32,812 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 98 flow. Second operand 3 states and 245 transitions. [2023-11-12 02:28:32,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 263 flow [2023-11-12 02:28:32,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:32,821 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 140 flow [2023-11-12 02:28:32,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-11-12 02:28:32,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-12 02:28:32,834 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 140 flow [2023-11-12 02:28:32,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 02:28:32,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:32,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:28:32,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:28:32,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:28:32,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1799159363, now seen corresponding path program 1 times [2023-11-12 02:28:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:32,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545548811] [2023-11-12 02:28:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:32,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:32,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:32,931 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:32,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 02:28:32,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 02:28:32,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 02:28:32,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 02:28:32,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 02:28:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:28:32,934 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:28:32,934 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:32,935 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:28:32,976 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:28:32,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 108 transitions, 234 flow [2023-11-12 02:28:33,017 INFO L124 PetriNetUnfolderBase]: 18/229 cut-off events. [2023-11-12 02:28:33,018 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:28:33,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 667 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2023-11-12 02:28:33,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 108 transitions, 234 flow [2023-11-12 02:28:33,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 234 flow [2023-11-12 02:28:33,022 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:33,022 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 108 transitions, 234 flow [2023-11-12 02:28:33,023 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 108 transitions, 234 flow [2023-11-12 02:28:33,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 108 transitions, 234 flow [2023-11-12 02:28:33,049 INFO L124 PetriNetUnfolderBase]: 18/229 cut-off events. [2023-11-12 02:28:33,049 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:28:33,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 667 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2023-11-12 02:28:33,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 6120 [2023-11-12 02:28:34,611 INFO L134 LiptonReduction]: Checked pairs total: 19261 [2023-11-12 02:28:34,612 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-11-12 02:28:34,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:34,615 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;@4ebb333f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:34,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 02:28:34,618 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:34,619 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-12 02:28:34,619 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:28:34,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:34,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:34,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:28:34,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:34,620 INFO L85 PathProgramCache]: Analyzing trace with hash 206549988, now seen corresponding path program 1 times [2023-11-12 02:28:34,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563530824] [2023-11-12 02:28:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:34,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:34,706 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 02:28:34,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563530824] [2023-11-12 02:28:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563530824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:34,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:34,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427379457] [2023-11-12 02:28:34,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:34,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 175 [2023-11-12 02:28:34,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 02:28:34,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:34,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 175 [2023-11-12 02:28:34,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:40,266 INFO L124 PetriNetUnfolderBase]: 35438/50764 cut-off events. [2023-11-12 02:28:40,267 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2023-11-12 02:28:40,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99579 conditions, 50764 events. 35438/50764 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 336750 event pairs, 18959 based on Foata normal form. 3744/47420 useless extension candidates. Maximal degree in co-relation 23209. Up to 34788 conditions per place. [2023-11-12 02:28:40,592 INFO L140 encePairwiseOnDemand]: 159/175 looper letters, 73 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2023-11-12 02:28:40,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 366 flow [2023-11-12 02:28:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-11-12 02:28:40,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580952380952381 [2023-11-12 02:28:40,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-11-12 02:28:40,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-11-12 02:28:40,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:40,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-11-12 02:28:40,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:40,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 02:28:40,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 02:28:40,607 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 128 flow. Second operand 3 states and 293 transitions. [2023-11-12 02:28:40,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 366 flow [2023-11-12 02:28:40,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 362 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:40,614 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 190 flow [2023-11-12 02:28:40,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-12 02:28:40,616 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-11-12 02:28:40,616 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 190 flow [2023-11-12 02:28:40,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 02:28:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:28:40,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:28:40,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:28:40,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 899224912, now seen corresponding path program 1 times [2023-11-12 02:28:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:40,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252982915] [2023-11-12 02:28:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:40,655 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:40,676 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:40,677 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:40,677 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-12 02:28:40,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-12 02:28:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-12 02:28:40,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-12 02:28:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-12 02:28:40,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-12 02:28:40,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:28:40,682 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:28:40,683 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:40,684 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:28:40,736 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:28:40,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 280 flow [2023-11-12 02:28:40,785 INFO L124 PetriNetUnfolderBase]: 23/288 cut-off events. [2023-11-12 02:28:40,785 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:28:40,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 288 events. 23/288 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 886 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2023-11-12 02:28:40,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 126 transitions, 280 flow [2023-11-12 02:28:40,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 126 transitions, 280 flow [2023-11-12 02:28:40,790 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:40,790 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 126 transitions, 280 flow [2023-11-12 02:28:40,792 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 126 transitions, 280 flow [2023-11-12 02:28:40,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 280 flow [2023-11-12 02:28:40,830 INFO L124 PetriNetUnfolderBase]: 23/288 cut-off events. [2023-11-12 02:28:40,831 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:28:40,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 288 events. 23/288 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 886 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2023-11-12 02:28:40,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 9384 [2023-11-12 02:28:42,526 INFO L134 LiptonReduction]: Checked pairs total: 37916 [2023-11-12 02:28:42,526 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-11-12 02:28:42,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:42,530 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;@4ebb333f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:42,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-12 02:28:42,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:42,534 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-12 02:28:42,534 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:28:42,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:42,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:28:42,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-12 02:28:42,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1848149803, now seen corresponding path program 1 times [2023-11-12 02:28:42,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156395355] [2023-11-12 02:28:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:42,661 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 02:28:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156395355] [2023-11-12 02:28:42,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156395355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:42,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900877451] [2023-11-12 02:28:42,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:42,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:42,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 202 [2023-11-12 02:28:42,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 02:28:42,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:42,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 202 [2023-11-12 02:28:42,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand