./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 e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/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_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:53,939 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:54,008 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:57:54,014 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:54,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:54,051 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:54,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:54,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:54,054 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:54,059 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:54,061 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:54,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:54,062 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:54,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:54,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:57:54,065 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:54,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:54,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:54,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:54,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:57:54,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:54,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:57:54,068 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:54,069 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:57:54,069 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:54,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:54,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:54,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:54,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:54,071 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:54,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:54,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:57:54,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:54,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:54,073 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:54,073 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:57:54,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:54,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:54,074 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:54,085 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_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2023-11-06 21:57:54,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:54,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:54,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:54,459 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:54,460 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:54,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-11-06 21:57:57,479 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:57,887 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:57,891 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-11-06 21:57:57,921 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/data/9001bdca0/3d4f2a074a094886b25a39dab949614a/FLAG2418f5e14 [2023-11-06 21:57:57,941 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/data/9001bdca0/3d4f2a074a094886b25a39dab949614a [2023-11-06 21:57:57,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:57,949 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:57,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:57,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:57,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:57,960 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:57" (1/1) ... [2023-11-06 21:57:57,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237b407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:57, skipping insertion in model container [2023-11-06 21:57:57,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:57" (1/1) ... [2023-11-06 21:57:58,022 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:58,211 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 21:57:58,420 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_6d7b6d7e-0756-4a52-ae1c-739687100c0c/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-11-06 21:57:58,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:58,444 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:58,475 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 21:57:58,510 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_6d7b6d7e-0756-4a52-ae1c-739687100c0c/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-11-06 21:57:58,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:58,567 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:57:58,568 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:57:58,568 WARN L672 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:57:58,576 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:58,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58 WrapperNode [2023-11-06 21:57:58,577 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:58,578 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:58,579 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:58,579 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:58,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,654 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2023-11-06 21:57:58,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:58,658 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:58,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:58,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:58,668 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,676 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,701 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,714 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:58,720 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:58,720 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:58,721 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:58,722 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (1/1) ... [2023-11-06 21:57:58,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:58,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:58,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7b6d7e-0756-4a52-ae1c-739687100c0c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:57:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 21:57:58,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 21:57:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:57:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:57:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:57:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:57:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:57:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:57:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:58,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:58,812 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:57:58,987 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:58,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:59,224 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:59,371 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:59,377 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 21:57:59,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:59 BoogieIcfgContainer [2023-11-06 21:57:59,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:59,382 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:59,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:59,386 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:59,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:57" (1/3) ... [2023-11-06 21:57:59,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa38ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:59, skipping insertion in model container [2023-11-06 21:57:59,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:58" (2/3) ... [2023-11-06 21:57:59,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa38ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:59, skipping insertion in model container [2023-11-06 21:57:59,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:59" (3/3) ... [2023-11-06 21:57:59,389 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-11-06 21:57:59,399 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:57:59,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:59,408 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 21:57:59,409 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:57:59,483 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 21:57:59,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 72 transitions, 148 flow [2023-11-06 21:57:59,579 INFO L124 PetriNetUnfolderBase]: 8/111 cut-off events. [2023-11-06 21:57:59,580 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:57:59,586 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. [2023-11-06 21:57:59,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 72 transitions, 148 flow [2023-11-06 21:57:59,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 72 transitions, 148 flow [2023-11-06 21:57:59,594 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:57:59,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 72 transitions, 148 flow [2023-11-06 21:57:59,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 72 transitions, 148 flow [2023-11-06 21:57:59,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 72 transitions, 148 flow [2023-11-06 21:57:59,651 INFO L124 PetriNetUnfolderBase]: 8/111 cut-off events. [2023-11-06 21:57:59,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:57:59,653 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. [2023-11-06 21:57:59,655 INFO L119 LiptonReduction]: Number of co-enabled transitions 1428 [2023-11-06 21:58:01,163 INFO L134 LiptonReduction]: Checked pairs total: 3882 [2023-11-06 21:58:01,163 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-11-06 21:58:01,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:01,186 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c68d9e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:01,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 21:58:01,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:58:01,192 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-06 21:58:01,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:58:01,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:01,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 21:58:01,194 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)] === [2023-11-06 21:58:01,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1854603210, now seen corresponding path program 1 times [2023-11-06 21:58:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017363924] [2023-11-06 21:58:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:58:01,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:58:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:58:01,383 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:58:01,385 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:58:01,386 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 21:58:01,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 21:58:01,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 21:58:01,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 21:58:01,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:58:01,390 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-06 21:58:01,412 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:58:01,412 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 21:58:01,455 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 21:58:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 90 transitions, 190 flow [2023-11-06 21:58:01,524 INFO L124 PetriNetUnfolderBase]: 13/170 cut-off events. [2023-11-06 21:58:01,525 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:58:01,528 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. [2023-11-06 21:58:01,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 90 transitions, 190 flow [2023-11-06 21:58:01,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 90 transitions, 190 flow [2023-11-06 21:58:01,531 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:58:01,532 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 90 transitions, 190 flow [2023-11-06 21:58:01,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 90 transitions, 190 flow [2023-11-06 21:58:01,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 90 transitions, 190 flow [2023-11-06 21:58:01,569 INFO L124 PetriNetUnfolderBase]: 13/170 cut-off events. [2023-11-06 21:58:01,570 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:58:01,574 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. [2023-11-06 21:58:01,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 3468 [2023-11-06 21:58:03,049 INFO L134 LiptonReduction]: Checked pairs total: 10569 [2023-11-06 21:58:03,049 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-11-06 21:58:03,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:03,053 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c68d9e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:03,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 21:58:03,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:58:03,059 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-06 21:58:03,059 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:58:03,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:03,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:58:03,059 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)] === [2023-11-06 21:58:03,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1207289367, now seen corresponding path program 1 times [2023-11-06 21:58:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:03,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092143474] [2023-11-06 21:58:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:03,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:03,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092143474] [2023-11-06 21:58:03,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092143474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:03,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:03,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:03,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882803603] [2023-11-06 21:58:03,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:03,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:03,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:03,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:03,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:03,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 149 [2023-11-06 21:58:03,466 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) [2023-11-06 21:58:03,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:03,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 149 [2023-11-06 21:58:03,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:04,054 INFO L124 PetriNetUnfolderBase]: 1886/3179 cut-off events. [2023-11-06 21:58:04,054 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-06 21:58:04,060 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. [2023-11-06 21:58:04,078 INFO L140 encePairwiseOnDemand]: 137/149 looper letters, 53 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-06 21:58:04,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 263 flow [2023-11-06 21:58:04,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-06 21:58:04,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480984340044742 [2023-11-06 21:58:04,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-06 21:58:04,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-06 21:58:04,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:04,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-06 21:58:04,110 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) [2023-11-06 21:58:04,115 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) [2023-11-06 21:58:04,116 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) [2023-11-06 21:58:04,118 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 98 flow. Second operand 3 states and 245 transitions. [2023-11-06 21:58:04,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 263 flow [2023-11-06 21:58:04,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:58:04,127 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 140 flow [2023-11-06 21:58:04,131 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} [2023-11-06 21:58:04,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-11-06 21:58:04,136 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 140 flow [2023-11-06 21:58:04,137 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) [2023-11-06 21:58:04,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:04,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 21:58:04,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:58:04,139 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)] === [2023-11-06 21:58:04,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1799159363, now seen corresponding path program 1 times [2023-11-06 21:58:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:04,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164626639] [2023-11-06 21:58:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:58:04,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:58:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:58:04,220 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:58:04,224 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:58:04,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 21:58:04,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 21:58:04,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 21:58:04,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 21:58:04,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 21:58:04,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:58:04,226 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 21:58:04,227 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:58:04,227 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 21:58:04,265 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 21:58:04,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 108 transitions, 234 flow [2023-11-06 21:58:04,304 INFO L124 PetriNetUnfolderBase]: 18/229 cut-off events. [2023-11-06 21:58:04,305 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 21:58:04,307 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. [2023-11-06 21:58:04,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 108 transitions, 234 flow [2023-11-06 21:58:04,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 234 flow [2023-11-06 21:58:04,309 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:58:04,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 108 transitions, 234 flow [2023-11-06 21:58:04,310 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 108 transitions, 234 flow [2023-11-06 21:58:04,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 108 transitions, 234 flow [2023-11-06 21:58:04,336 INFO L124 PetriNetUnfolderBase]: 18/229 cut-off events. [2023-11-06 21:58:04,336 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 21:58:04,338 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. [2023-11-06 21:58:04,345 INFO L119 LiptonReduction]: Number of co-enabled transitions 6120 [2023-11-06 21:58:05,937 INFO L134 LiptonReduction]: Checked pairs total: 19261 [2023-11-06 21:58:05,937 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-11-06 21:58:05,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:05,940 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c68d9e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:05,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 21:58:05,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:58:05,946 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-06 21:58:05,946 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:58:05,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:05,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:58:05,947 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)] === [2023-11-06 21:58:05,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:05,947 INFO L85 PathProgramCache]: Analyzing trace with hash 206549988, now seen corresponding path program 1 times [2023-11-06 21:58:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:05,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690094948] [2023-11-06 21:58:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:05,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:06,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690094948] [2023-11-06 21:58:06,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690094948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:06,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:06,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:06,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216116279] [2023-11-06 21:58:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:06,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:06,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:06,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 175 [2023-11-06 21:58:06,137 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) [2023-11-06 21:58:06,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:06,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 175 [2023-11-06 21:58:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:11,434 INFO L124 PetriNetUnfolderBase]: 35438/50764 cut-off events. [2023-11-06 21:58:11,434 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2023-11-06 21:58:11,513 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. [2023-11-06 21:58:11,753 INFO L140 encePairwiseOnDemand]: 159/175 looper letters, 73 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2023-11-06 21:58:11,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 366 flow [2023-11-06 21:58:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:58:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-11-06 21:58:11,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580952380952381 [2023-11-06 21:58:11,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-11-06 21:58:11,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-11-06 21:58:11,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:11,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-11-06 21:58:11,758 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) [2023-11-06 21:58:11,760 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) [2023-11-06 21:58:11,761 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) [2023-11-06 21:58:11,761 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 128 flow. Second operand 3 states and 293 transitions. [2023-11-06 21:58:11,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 366 flow [2023-11-06 21:58:11,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 362 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 21:58:11,768 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 190 flow [2023-11-06 21:58:11,769 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} [2023-11-06 21:58:11,770 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-11-06 21:58:11,770 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 190 flow [2023-11-06 21:58:11,771 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) [2023-11-06 21:58:11,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:11,771 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 21:58:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:58:11,772 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)] === [2023-11-06 21:58:11,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 899224912, now seen corresponding path program 1 times [2023-11-06 21:58:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031233849] [2023-11-06 21:58:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:58:11,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:58:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:58:11,803 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:58:11,803 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:58:11,804 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 21:58:11,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 21:58:11,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 21:58:11,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 21:58:11,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 21:58:11,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 21:58:11,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:58:11,805 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 21:58:11,806 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:58:11,806 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 21:58:11,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 21:58:11,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 280 flow [2023-11-06 21:58:11,877 INFO L124 PetriNetUnfolderBase]: 23/288 cut-off events. [2023-11-06 21:58:11,878 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 21:58:11,879 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. [2023-11-06 21:58:11,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 126 transitions, 280 flow [2023-11-06 21:58:11,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 126 transitions, 280 flow [2023-11-06 21:58:11,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:58:11,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 126 transitions, 280 flow [2023-11-06 21:58:11,882 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 126 transitions, 280 flow [2023-11-06 21:58:11,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 280 flow [2023-11-06 21:58:11,917 INFO L124 PetriNetUnfolderBase]: 23/288 cut-off events. [2023-11-06 21:58:11,917 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 21:58:11,918 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. [2023-11-06 21:58:11,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 9384 [2023-11-06 21:58:13,722 INFO L134 LiptonReduction]: Checked pairs total: 37916 [2023-11-06 21:58:13,722 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-11-06 21:58:13,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:13,725 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c68d9e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:13,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 21:58:13,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:58:13,728 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-06 21:58:13,728 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:58:13,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:13,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:58:13,729 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)] === [2023-11-06 21:58:13,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1848149803, now seen corresponding path program 1 times [2023-11-06 21:58:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:13,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376208166] [2023-11-06 21:58:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:13,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:13,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:13,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376208166] [2023-11-06 21:58:13,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376208166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:13,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824977274] [2023-11-06 21:58:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:13,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:13,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 202 [2023-11-06 21:58:13,816 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) [2023-11-06 21:58:13,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:58:13,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 202 [2023-11-06 21:58:13,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand