./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:59:27,672 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:59:27,752 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 20:59:27,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:59:27,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:59:27,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:59:27,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:59:27,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:59:27,791 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:59:27,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:59:27,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:59:27,793 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:59:27,794 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:59:27,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:59:27,795 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:59:27,796 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:59:27,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:59:27,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:59:27,798 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 20:59:27,799 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 20:59:27,799 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 20:59:27,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:59:27,805 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 20:59:27,805 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 20:59:27,806 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:59:27,806 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:59:27,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:59:27,808 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:59:27,808 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:59:27,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:59:27,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:27,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:59:27,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:59:27,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:59:27,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:59:27,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:59:27,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:59:27,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:59:27,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:59:27,814 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_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2023-11-21 20:59:28,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:59:28,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:59:28,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:59:28,256 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:59:28,257 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:59:28,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-21 20:59:31,496 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:59:31,900 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:59:31,911 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-21 20:59:31,935 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data/7dbd77a9b/f8b70c985fc14669b90d1aeb0d7c9a03/FLAG39b6859f7 [2023-11-21 20:59:31,956 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data/7dbd77a9b/f8b70c985fc14669b90d1aeb0d7c9a03 [2023-11-21 20:59:31,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:59:31,967 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:59:31,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:31,972 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:59:31,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:59:31,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:31" (1/1) ... [2023-11-21 20:59:31,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b13d1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:31, skipping insertion in model container [2023-11-21 20:59:31,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:31" (1/1) ... [2023-11-21 20:59:32,054 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:59:32,347 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 20:59:32,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:32,631 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:59:32,669 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 20:59:32,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:32,756 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 20:59:32,756 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 20:59:32,756 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 20:59:32,765 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:59:32,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32 WrapperNode [2023-11-21 20:59:32,766 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:32,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:32,767 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:59:32,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:59:32,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,840 INFO L138 Inliner]: procedures = 174, calls = 52, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 121 [2023-11-21 20:59:32,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:32,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:59:32,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:59:32,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:59:32,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,859 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,860 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,868 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,870 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:59:32,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:59:32,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:59:32,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:59:32,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (1/1) ... [2023-11-21 20:59:32,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:32,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:32,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:59:32,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:59:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 20:59:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 20:59:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 20:59:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:59:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-21 20:59:32,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-21 20:59:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 20:59:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 20:59:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 20:59:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 20:59:32,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:59:32,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:59:32,982 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-21 20:59:32,982 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-21 20:59:32,984 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 20:59:33,133 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:59:33,136 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:59:33,552 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:59:33,739 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:59:33,748 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 20:59:33,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:59:33 BoogieIcfgContainer [2023-11-21 20:59:33,750 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:59:33,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:59:33,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:59:33,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:59:33,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:59:31" (1/3) ... [2023-11-21 20:59:33,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f62bcc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:59:33, skipping insertion in model container [2023-11-21 20:59:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:32" (2/3) ... [2023-11-21 20:59:33,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f62bcc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:59:33, skipping insertion in model container [2023-11-21 20:59:33,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:59:33" (3/3) ... [2023-11-21 20:59:33,769 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-11-21 20:59:33,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:59:33,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-21 20:59:33,790 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 20:59:33,870 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-21 20:59:33,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 89 transitions, 206 flow [2023-11-21 20:59:33,969 INFO L124 PetriNetUnfolderBase]: 4/85 cut-off events. [2023-11-21 20:59:33,969 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-21 20:59:33,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 85 events. 4/85 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-21 20:59:33,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 89 transitions, 206 flow [2023-11-21 20:59:33,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 84 transitions, 192 flow [2023-11-21 20:59:33,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:59:34,002 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@51b063c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:59:34,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-21 20:59:34,006 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 20:59:34,006 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 20:59:34,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 20:59:34,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:34,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 20:59:34,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:34,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash 8626, now seen corresponding path program 1 times [2023-11-21 20:59:34,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:34,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828743964] [2023-11-21 20:59:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:34,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828743964] [2023-11-21 20:59:34,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828743964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:34,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:34,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009638685] [2023-11-21 20:59:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:34,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:34,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:34,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 89 [2023-11-21 20:59:34,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-11-21 20:59:34,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:34,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 89 [2023-11-21 20:59:34,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:35,503 INFO L124 PetriNetUnfolderBase]: 2192/5034 cut-off events. [2023-11-21 20:59:35,504 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2023-11-21 20:59:35,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8356 conditions, 5034 events. 2192/5034 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 43802 event pairs, 2192 based on Foata normal form. 632/5216 useless extension candidates. Maximal degree in co-relation 7278. Up to 3091 conditions per place. [2023-11-21 20:59:35,566 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 26 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-21 20:59:35,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 76 transitions, 232 flow [2023-11-21 20:59:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-11-21 20:59:35,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340823970037453 [2023-11-21 20:59:35,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-11-21 20:59:35,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-11-21 20:59:35,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:35,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-11-21 20:59:35,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2023-11-21 20:59:35,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:35,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:35,601 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 192 flow. Second operand 3 states and 196 transitions. [2023-11-21 20:59:35,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 76 transitions, 232 flow [2023-11-21 20:59:35,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 216 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-21 20:59:35,619 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 164 flow [2023-11-21 20:59:35,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-11-21 20:59:35,625 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -10 predicate places. [2023-11-21 20:59:35,625 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 164 flow [2023-11-21 20:59:35,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-11-21 20:59:35,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:35,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 20:59:35,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:59:35,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:35,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 8627, now seen corresponding path program 1 times [2023-11-21 20:59:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:35,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947700844] [2023-11-21 20:59:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:35,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:35,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947700844] [2023-11-21 20:59:35,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947700844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:35,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:35,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:35,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269524617] [2023-11-21 20:59:35,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:35,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:35,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:35,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 20:59:35,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-21 20:59:35,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:35,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 20:59:35,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:36,410 INFO L124 PetriNetUnfolderBase]: 1532/3610 cut-off events. [2023-11-21 20:59:36,411 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-21 20:59:36,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5885 conditions, 3610 events. 1532/3610 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 30163 event pairs, 1532 based on Foata normal form. 226/3566 useless extension candidates. Maximal degree in co-relation 5875. Up to 2205 conditions per place. [2023-11-21 20:59:36,444 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 24 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-21 20:59:36,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 74 transitions, 212 flow [2023-11-21 20:59:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-11-21 20:59:36,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340823970037453 [2023-11-21 20:59:36,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-11-21 20:59:36,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-11-21 20:59:36,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:36,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-11-21 20:59:36,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2023-11-21 20:59:36,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:36,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:36,460 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 164 flow. Second operand 3 states and 196 transitions. [2023-11-21 20:59:36,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 74 transitions, 212 flow [2023-11-21 20:59:36,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:36,464 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 160 flow [2023-11-21 20:59:36,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2023-11-21 20:59:36,465 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -12 predicate places. [2023-11-21 20:59:36,466 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 160 flow [2023-11-21 20:59:36,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-21 20:59:36,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:36,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 20:59:36,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 20:59:36,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:36,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash 257262780, now seen corresponding path program 1 times [2023-11-21 20:59:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:36,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620507205] [2023-11-21 20:59:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:36,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:36,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:36,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620507205] [2023-11-21 20:59:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620507205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:36,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:36,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532233034] [2023-11-21 20:59:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:36,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:36,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 89 [2023-11-21 20:59:36,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2023-11-21 20:59:36,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:36,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 89 [2023-11-21 20:59:36,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:37,293 INFO L124 PetriNetUnfolderBase]: 1704/3987 cut-off events. [2023-11-21 20:59:37,293 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-21 20:59:37,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6512 conditions, 3987 events. 1704/3987 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 33591 event pairs, 1704 based on Foata normal form. 0/3706 useless extension candidates. Maximal degree in co-relation 6502. Up to 2455 conditions per place. [2023-11-21 20:59:37,341 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 26 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-21 20:59:37,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 212 flow [2023-11-21 20:59:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-11-21 20:59:37,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7191011235955056 [2023-11-21 20:59:37,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-11-21 20:59:37,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-11-21 20:59:37,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:37,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-11-21 20:59:37,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-21 20:59:37,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:37,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:37,349 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 160 flow. Second operand 3 states and 192 transitions. [2023-11-21 20:59:37,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 212 flow [2023-11-21 20:59:37,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:37,354 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 156 flow [2023-11-21 20:59:37,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2023-11-21 20:59:37,356 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -14 predicate places. [2023-11-21 20:59:37,356 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 156 flow [2023-11-21 20:59:37,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2023-11-21 20:59:37,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:37,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 20:59:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 20:59:37,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:37,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash 257262781, now seen corresponding path program 1 times [2023-11-21 20:59:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:37,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490306135] [2023-11-21 20:59:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:37,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:37,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:37,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490306135] [2023-11-21 20:59:37,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490306135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:37,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:37,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:37,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162143990] [2023-11-21 20:59:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:37,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:37,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 20:59:37,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2023-11-21 20:59:37,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:37,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 20:59:37,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:38,071 INFO L124 PetriNetUnfolderBase]: 1532/3574 cut-off events. [2023-11-21 20:59:38,071 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-21 20:59:38,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5849 conditions, 3574 events. 1532/3574 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29727 event pairs, 1532 based on Foata normal form. 63/3403 useless extension candidates. Maximal degree in co-relation 5839. Up to 2205 conditions per place. [2023-11-21 20:59:38,104 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 24 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-11-21 20:59:38,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 204 flow [2023-11-21 20:59:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-11-21 20:59:38,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340823970037453 [2023-11-21 20:59:38,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-11-21 20:59:38,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-11-21 20:59:38,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:38,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-11-21 20:59:38,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2023-11-21 20:59:38,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:38,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:38,111 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 156 flow. Second operand 3 states and 196 transitions. [2023-11-21 20:59:38,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 204 flow [2023-11-21 20:59:38,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:38,117 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 152 flow [2023-11-21 20:59:38,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-11-21 20:59:38,120 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -16 predicate places. [2023-11-21 20:59:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 152 flow [2023-11-21 20:59:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2023-11-21 20:59:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:38,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:38,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 20:59:38,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:38,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1894112150, now seen corresponding path program 1 times [2023-11-21 20:59:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:38,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985247147] [2023-11-21 20:59:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:38,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:38,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985247147] [2023-11-21 20:59:38,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985247147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:38,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:38,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:38,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556632781] [2023-11-21 20:59:38,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:38,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:38,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:38,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:38,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 89 [2023-11-21 20:59:38,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-11-21 20:59:38,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:38,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 89 [2023-11-21 20:59:38,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:38,858 INFO L124 PetriNetUnfolderBase]: 1576/3652 cut-off events. [2023-11-21 20:59:38,859 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-21 20:59:38,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6001 conditions, 3652 events. 1576/3652 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30447 event pairs, 1576 based on Foata normal form. 0/3433 useless extension candidates. Maximal degree in co-relation 5991. Up to 2279 conditions per place. [2023-11-21 20:59:38,894 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 26 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-21 20:59:38,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 204 flow [2023-11-21 20:59:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-11-21 20:59:38,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7191011235955056 [2023-11-21 20:59:38,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-11-21 20:59:38,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-11-21 20:59:38,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:38,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-11-21 20:59:38,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-21 20:59:38,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:38,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:38,903 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 152 flow. Second operand 3 states and 192 transitions. [2023-11-21 20:59:38,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 204 flow [2023-11-21 20:59:38,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 68 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:38,906 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 148 flow [2023-11-21 20:59:38,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2023-11-21 20:59:38,911 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -18 predicate places. [2023-11-21 20:59:38,911 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 148 flow [2023-11-21 20:59:38,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-11-21 20:59:38,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:38,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:38,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 20:59:38,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:38,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:38,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1894112151, now seen corresponding path program 1 times [2023-11-21 20:59:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:38,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615229996] [2023-11-21 20:59:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:38,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:39,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615229996] [2023-11-21 20:59:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615229996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:39,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:39,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:39,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010629886] [2023-11-21 20:59:39,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:39,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:39,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:39,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 20:59:39,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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) [2023-11-21 20:59:39,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:39,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 20:59:39,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:39,612 INFO L124 PetriNetUnfolderBase]: 1532/3562 cut-off events. [2023-11-21 20:59:39,612 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-21 20:59:39,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5837 conditions, 3562 events. 1532/3562 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29567 event pairs, 1532 based on Foata normal form. 27/3367 useless extension candidates. Maximal degree in co-relation 5827. Up to 2205 conditions per place. [2023-11-21 20:59:39,647 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 24 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-21 20:59:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 196 flow [2023-11-21 20:59:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-11-21 20:59:39,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340823970037453 [2023-11-21 20:59:39,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-11-21 20:59:39,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-11-21 20:59:39,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:39,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-11-21 20:59:39,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2023-11-21 20:59:39,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:39,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:39,654 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 148 flow. Second operand 3 states and 196 transitions. [2023-11-21 20:59:39,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 196 flow [2023-11-21 20:59:39,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 66 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:39,662 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 144 flow [2023-11-21 20:59:39,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2023-11-21 20:59:39,666 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -20 predicate places. [2023-11-21 20:59:39,666 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 144 flow [2023-11-21 20:59:39,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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) [2023-11-21 20:59:39,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:39,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:39,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 20:59:39,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:39,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 215014010, now seen corresponding path program 1 times [2023-11-21 20:59:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:39,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642033450] [2023-11-21 20:59:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:39,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642033450] [2023-11-21 20:59:39,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642033450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:39,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:39,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789210344] [2023-11-21 20:59:39,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:39,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:39,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 89 [2023-11-21 20:59:39,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-21 20:59:39,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:39,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 89 [2023-11-21 20:59:39,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:40,329 INFO L124 PetriNetUnfolderBase]: 1632/3629 cut-off events. [2023-11-21 20:59:40,329 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-21 20:59:40,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 3629 events. 1632/3629 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29384 event pairs, 1632 based on Foata normal form. 0/3477 useless extension candidates. Maximal degree in co-relation 6044. Up to 2355 conditions per place. [2023-11-21 20:59:40,352 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 26 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-11-21 20:59:40,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 196 flow [2023-11-21 20:59:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-11-21 20:59:40,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7191011235955056 [2023-11-21 20:59:40,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-11-21 20:59:40,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-11-21 20:59:40,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:40,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-11-21 20:59:40,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-21 20:59:40,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:40,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:40,357 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 144 flow. Second operand 3 states and 192 transitions. [2023-11-21 20:59:40,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 196 flow [2023-11-21 20:59:40,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:40,359 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 140 flow [2023-11-21 20:59:40,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2023-11-21 20:59:40,360 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -22 predicate places. [2023-11-21 20:59:40,361 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 140 flow [2023-11-21 20:59:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-21 20:59:40,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:40,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 20:59:40,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 215014011, now seen corresponding path program 1 times [2023-11-21 20:59:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461462963] [2023-11-21 20:59:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:40,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461462963] [2023-11-21 20:59:40,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461462963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:40,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:40,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:59:40,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707522738] [2023-11-21 20:59:40,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:40,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:40,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:40,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 20:59:40,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2023-11-21 20:59:40,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:40,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 20:59:40,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:40,839 INFO L124 PetriNetUnfolderBase]: 1532/3470 cut-off events. [2023-11-21 20:59:40,839 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-21 20:59:40,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 3470 events. 1532/3470 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28243 event pairs, 1532 based on Foata normal form. 49/3389 useless extension candidates. Maximal degree in co-relation 5735. Up to 2205 conditions per place. [2023-11-21 20:59:40,865 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 24 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-21 20:59:40,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 62 transitions, 188 flow [2023-11-21 20:59:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-11-21 20:59:40,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340823970037453 [2023-11-21 20:59:40,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-11-21 20:59:40,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-11-21 20:59:40,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:40,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-11-21 20:59:40,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2023-11-21 20:59:40,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:40,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:40,870 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 140 flow. Second operand 3 states and 196 transitions. [2023-11-21 20:59:40,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 62 transitions, 188 flow [2023-11-21 20:59:40,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:40,872 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 136 flow [2023-11-21 20:59:40,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-11-21 20:59:40,875 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -24 predicate places. [2023-11-21 20:59:40,875 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 136 flow [2023-11-21 20:59:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2023-11-21 20:59:40,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:40,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:40,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 20:59:40,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:40,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1451812211, now seen corresponding path program 1 times [2023-11-21 20:59:40,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:40,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881118446] [2023-11-21 20:59:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:40,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:40,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:40,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881118446] [2023-11-21 20:59:40,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881118446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:40,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:40,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:59:40,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526415025] [2023-11-21 20:59:40,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:40,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:59:40,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:59:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:59:40,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 89 [2023-11-21 20:59:40,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 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) [2023-11-21 20:59:40,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:40,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 89 [2023-11-21 20:59:40,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:43,778 INFO L124 PetriNetUnfolderBase]: 14102/24968 cut-off events. [2023-11-21 20:59:43,779 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2023-11-21 20:59:43,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44950 conditions, 24968 events. 14102/24968 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 220516 event pairs, 1535 based on Foata normal form. 0/24393 useless extension candidates. Maximal degree in co-relation 44932. Up to 6266 conditions per place. [2023-11-21 20:59:43,959 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 182 selfloop transitions, 37 changer transitions 0/246 dead transitions. [2023-11-21 20:59:43,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 246 transitions, 977 flow [2023-11-21 20:59:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 20:59:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 20:59:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 859 transitions. [2023-11-21 20:59:43,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.742437337942956 [2023-11-21 20:59:43,964 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 859 transitions. [2023-11-21 20:59:43,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 859 transitions. [2023-11-21 20:59:43,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:43,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 859 transitions. [2023-11-21 20:59:43,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 66.07692307692308) internal successors, (859), 13 states have internal predecessors, (859), 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) [2023-11-21 20:59:43,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 20:59:43,971 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 20:59:43,972 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 136 flow. Second operand 13 states and 859 transitions. [2023-11-21 20:59:43,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 246 transitions, 977 flow [2023-11-21 20:59:43,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 246 transitions, 969 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:43,978 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 375 flow [2023-11-21 20:59:43,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=375, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2023-11-21 20:59:43,979 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -6 predicate places. [2023-11-21 20:59:43,979 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 375 flow [2023-11-21 20:59:43,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 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) [2023-11-21 20:59:43,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:43,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:43,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 20:59:43,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:43,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:43,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1465384461, now seen corresponding path program 1 times [2023-11-21 20:59:43,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:43,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409472118] [2023-11-21 20:59:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:43,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:44,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:44,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409472118] [2023-11-21 20:59:44,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409472118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:44,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:44,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 20:59:44,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862097060] [2023-11-21 20:59:44,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:44,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:44,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:44,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:44,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 20:59:44,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 375 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2023-11-21 20:59:44,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:44,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 20:59:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:45,787 INFO L124 PetriNetUnfolderBase]: 7409/15154 cut-off events. [2023-11-21 20:59:45,788 INFO L125 PetriNetUnfolderBase]: For 5770/6213 co-relation queries the response was YES. [2023-11-21 20:59:46,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30758 conditions, 15154 events. 7409/15154 cut-off events. For 5770/6213 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 147672 event pairs, 2916 based on Foata normal form. 708/15044 useless extension candidates. Maximal degree in co-relation 24307. Up to 5305 conditions per place. [2023-11-21 20:59:46,101 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 41 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2023-11-21 20:59:46,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 510 flow [2023-11-21 20:59:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-11-21 20:59:46,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8127340823970037 [2023-11-21 20:59:46,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-11-21 20:59:46,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-11-21 20:59:46,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:46,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-11-21 20:59:46,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2023-11-21 20:59:46,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:46,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 20:59:46,107 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 375 flow. Second operand 3 states and 217 transitions. [2023-11-21 20:59:46,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 510 flow [2023-11-21 20:59:46,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 20:59:46,520 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 391 flow [2023-11-21 20:59:46,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=391, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2023-11-21 20:59:46,522 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2023-11-21 20:59:46,522 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 391 flow [2023-11-21 20:59:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2023-11-21 20:59:46,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:46,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 20:59:46,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:46,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1791583799, now seen corresponding path program 2 times [2023-11-21 20:59:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:46,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448577838] [2023-11-21 20:59:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:46,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:46,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:46,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448577838] [2023-11-21 20:59:46,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448577838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:46,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 20:59:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540712582] [2023-11-21 20:59:46,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:46,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:59:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:59:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:59:46,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 20:59:46,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 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) [2023-11-21 20:59:46,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:46,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 20:59:46,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:48,175 INFO L124 PetriNetUnfolderBase]: 6413/13177 cut-off events. [2023-11-21 20:59:48,176 INFO L125 PetriNetUnfolderBase]: For 6362/6557 co-relation queries the response was YES. [2023-11-21 20:59:48,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28036 conditions, 13177 events. 6413/13177 cut-off events. For 6362/6557 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 121276 event pairs, 1703 based on Foata normal form. 318/13131 useless extension candidates. Maximal degree in co-relation 24971. Up to 3859 conditions per place. [2023-11-21 20:59:48,295 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 63 selfloop transitions, 9 changer transitions 0/145 dead transitions. [2023-11-21 20:59:48,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 660 flow [2023-11-21 20:59:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 20:59:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 20:59:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 298 transitions. [2023-11-21 20:59:48,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8370786516853933 [2023-11-21 20:59:48,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 298 transitions. [2023-11-21 20:59:48,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 298 transitions. [2023-11-21 20:59:48,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:48,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 298 transitions. [2023-11-21 20:59:48,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 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) [2023-11-21 20:59:48,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 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) [2023-11-21 20:59:48,303 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 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) [2023-11-21 20:59:48,303 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 391 flow. Second operand 4 states and 298 transitions. [2023-11-21 20:59:48,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 660 flow [2023-11-21 20:59:48,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 145 transitions, 648 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:48,501 INFO L231 Difference]: Finished difference. Result has 94 places, 109 transitions, 457 flow [2023-11-21 20:59:48,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=94, PETRI_TRANSITIONS=109} [2023-11-21 20:59:48,502 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2023-11-21 20:59:48,502 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 109 transitions, 457 flow [2023-11-21 20:59:48,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 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) [2023-11-21 20:59:48,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:48,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:48,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 20:59:48,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:48,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2095153151, now seen corresponding path program 1 times [2023-11-21 20:59:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:48,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254356558] [2023-11-21 20:59:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:48,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:48,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254356558] [2023-11-21 20:59:48,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254356558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:48,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:48,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:59:48,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439861779] [2023-11-21 20:59:48,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:48,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:59:48,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:59:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:59:48,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 89 [2023-11-21 20:59:48,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 109 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 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) [2023-11-21 20:59:48,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:48,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 89 [2023-11-21 20:59:48,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:51,592 INFO L124 PetriNetUnfolderBase]: 13462/23238 cut-off events. [2023-11-21 20:59:51,592 INFO L125 PetriNetUnfolderBase]: For 21248/21969 co-relation queries the response was YES. [2023-11-21 20:59:51,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57109 conditions, 23238 events. 13462/23238 cut-off events. For 21248/21969 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 191812 event pairs, 2029 based on Foata normal form. 468/23314 useless extension candidates. Maximal degree in co-relation 52783. Up to 5104 conditions per place. [2023-11-21 20:59:51,797 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 204 selfloop transitions, 70 changer transitions 0/314 dead transitions. [2023-11-21 20:59:51,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 314 transitions, 1842 flow [2023-11-21 20:59:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 20:59:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 20:59:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 845 transitions. [2023-11-21 20:59:51,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7303370786516854 [2023-11-21 20:59:51,801 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 845 transitions. [2023-11-21 20:59:51,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 845 transitions. [2023-11-21 20:59:51,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:51,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 845 transitions. [2023-11-21 20:59:51,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.0) internal successors, (845), 13 states have internal predecessors, (845), 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) [2023-11-21 20:59:51,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 20:59:51,809 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 20:59:51,809 INFO L175 Difference]: Start difference. First operand has 94 places, 109 transitions, 457 flow. Second operand 13 states and 845 transitions. [2023-11-21 20:59:51,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 314 transitions, 1842 flow [2023-11-21 20:59:52,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 314 transitions, 1842 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 20:59:52,608 INFO L231 Difference]: Finished difference. Result has 116 places, 168 transitions, 1060 flow [2023-11-21 20:59:52,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1060, PETRI_PLACES=116, PETRI_TRANSITIONS=168} [2023-11-21 20:59:52,609 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 23 predicate places. [2023-11-21 20:59:52,609 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 168 transitions, 1060 flow [2023-11-21 20:59:52,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 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) [2023-11-21 20:59:52,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:52,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 20:59:52,611 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:52,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1939781929, now seen corresponding path program 1 times [2023-11-21 20:59:52,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:52,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883306950] [2023-11-21 20:59:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:52,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:52,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883306950] [2023-11-21 20:59:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883306950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:52,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:59:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051195429] [2023-11-21 20:59:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:59:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:59:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:59:52,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 89 [2023-11-21 20:59:52,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 168 transitions, 1060 flow. Second operand has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 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) [2023-11-21 20:59:52,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:52,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 89 [2023-11-21 20:59:52,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:56,244 INFO L124 PetriNetUnfolderBase]: 14310/24733 cut-off events. [2023-11-21 20:59:56,244 INFO L125 PetriNetUnfolderBase]: For 36428/36773 co-relation queries the response was YES. [2023-11-21 20:59:56,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71323 conditions, 24733 events. 14310/24733 cut-off events. For 36428/36773 co-relation queries the response was YES. Maximal size of possible extension queue 1258. Compared 205445 event pairs, 3047 based on Foata normal form. 444/24940 useless extension candidates. Maximal degree in co-relation 66975. Up to 7174 conditions per place. [2023-11-21 20:59:56,438 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 201 selfloop transitions, 87 changer transitions 0/328 dead transitions. [2023-11-21 20:59:56,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 328 transitions, 2378 flow [2023-11-21 20:59:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 20:59:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 20:59:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 825 transitions. [2023-11-21 20:59:56,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7130509939498704 [2023-11-21 20:59:56,443 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 825 transitions. [2023-11-21 20:59:56,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 825 transitions. [2023-11-21 20:59:56,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:56,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 825 transitions. [2023-11-21 20:59:56,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 63.46153846153846) internal successors, (825), 13 states have internal predecessors, (825), 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) [2023-11-21 20:59:56,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 20:59:56,451 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 20:59:56,451 INFO L175 Difference]: Start difference. First operand has 116 places, 168 transitions, 1060 flow. Second operand 13 states and 825 transitions. [2023-11-21 20:59:56,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 328 transitions, 2378 flow [2023-11-21 20:59:57,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 328 transitions, 2376 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-21 20:59:57,809 INFO L231 Difference]: Finished difference. Result has 132 places, 197 transitions, 1538 flow [2023-11-21 20:59:57,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1538, PETRI_PLACES=132, PETRI_TRANSITIONS=197} [2023-11-21 20:59:57,811 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 39 predicate places. [2023-11-21 20:59:57,812 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 197 transitions, 1538 flow [2023-11-21 20:59:57,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 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) [2023-11-21 20:59:57,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:57,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:57,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 20:59:57,814 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 20:59:57,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1122724535, now seen corresponding path program 1 times [2023-11-21 20:59:57,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:57,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984268065] [2023-11-21 20:59:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:57,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:57,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:57,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984268065] [2023-11-21 20:59:57,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984268065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:57,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:57,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:59:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289300124] [2023-11-21 20:59:57,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:59:57,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:59:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:59:57,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 89 [2023-11-21 20:59:57,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 197 transitions, 1538 flow. Second operand has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 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) [2023-11-21 20:59:57,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:57,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 89 [2023-11-21 20:59:57,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:00:01,502 INFO L124 PetriNetUnfolderBase]: 15061/25949 cut-off events. [2023-11-21 21:00:01,502 INFO L125 PetriNetUnfolderBase]: For 55887/56479 co-relation queries the response was YES. [2023-11-21 21:00:01,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78653 conditions, 25949 events. 15061/25949 cut-off events. For 55887/56479 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 215421 event pairs, 3000 based on Foata normal form. 670/26344 useless extension candidates. Maximal degree in co-relation 74721. Up to 7244 conditions per place. [2023-11-21 21:00:01,727 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 215 selfloop transitions, 94 changer transitions 0/363 dead transitions. [2023-11-21 21:00:01,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 363 transitions, 2946 flow [2023-11-21 21:00:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 21:00:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 21:00:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 827 transitions. [2023-11-21 21:00:01,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7147796024200519 [2023-11-21 21:00:01,731 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 827 transitions. [2023-11-21 21:00:01,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 827 transitions. [2023-11-21 21:00:01,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:00:01,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 827 transitions. [2023-11-21 21:00:01,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 63.61538461538461) internal successors, (827), 13 states have internal predecessors, (827), 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) [2023-11-21 21:00:01,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 21:00:01,739 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 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) [2023-11-21 21:00:01,739 INFO L175 Difference]: Start difference. First operand has 132 places, 197 transitions, 1538 flow. Second operand 13 states and 827 transitions. [2023-11-21 21:00:01,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 363 transitions, 2946 flow [2023-11-21 21:00:03,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 363 transitions, 2932 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-21 21:00:03,725 INFO L231 Difference]: Finished difference. Result has 147 places, 226 transitions, 2032 flow [2023-11-21 21:00:03,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2032, PETRI_PLACES=147, PETRI_TRANSITIONS=226} [2023-11-21 21:00:03,726 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 54 predicate places. [2023-11-21 21:00:03,727 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 226 transitions, 2032 flow [2023-11-21 21:00:03,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 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) [2023-11-21 21:00:03,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:00:03,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:03,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 21:00:03,728 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting readerErr0ASSERT_VIOLATIONMEMORY_LEAK === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 21:00:03,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1171582728, now seen corresponding path program 1 times [2023-11-21 21:00:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:03,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121681863] [2023-11-21 21:00:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:03,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:00:03,781 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 21:00:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:00:03,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 21:00:03,863 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 21:00:03,864 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (23 of 24 remaining) [2023-11-21 21:00:03,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 24 remaining) [2023-11-21 21:00:03,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2023-11-21 21:00:03,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2023-11-21 21:00:03,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2023-11-21 21:00:03,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2023-11-21 21:00:03,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2023-11-21 21:00:03,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2023-11-21 21:00:03,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2023-11-21 21:00:03,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2023-11-21 21:00:03,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2023-11-21 21:00:03,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2023-11-21 21:00:03,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2023-11-21 21:00:03,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2023-11-21 21:00:03,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2023-11-21 21:00:03,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2023-11-21 21:00:03,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2023-11-21 21:00:03,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 24 remaining) [2023-11-21 21:00:03,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (5 of 24 remaining) [2023-11-21 21:00:03,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 24 remaining) [2023-11-21 21:00:03,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 24 remaining) [2023-11-21 21:00:03,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 24 remaining) [2023-11-21 21:00:03,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 24 remaining) [2023-11-21 21:00:03,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 24 remaining) [2023-11-21 21:00:03,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 21:00:03,873 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:03,880 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-21 21:00:03,880 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 21:00:03,936 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated [2023-11-21 21:00:03,938 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated [2023-11-21 21:00:03,938 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated [2023-11-21 21:00:03,943 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated [2023-11-21 21:00:03,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 09:00:03 BasicIcfg [2023-11-21 21:00:03,962 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 21:00:03,962 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 21:00:03,963 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 21:00:03,963 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 21:00:03,963 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:59:33" (3/4) ... [2023-11-21 21:00:03,965 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 21:00:03,966 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 21:00:03,967 INFO L158 Benchmark]: Toolchain (without parser) took 32000.06ms. Allocated memory was 148.9MB in the beginning and 9.5GB in the end (delta: 9.4GB). Free memory was 104.8MB in the beginning and 8.4GB in the end (delta: -8.3GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2023-11-21 21:00:03,968 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 148.9MB. Free memory is still 123.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:00:03,968 INFO L158 Benchmark]: CACSL2BoogieTranslator took 795.18ms. Allocated memory is still 148.9MB. Free memory was 104.4MB in the beginning and 84.2MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-21 21:00:03,969 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.00ms. Allocated memory is still 148.9MB. Free memory was 84.2MB in the beginning and 82.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:00:03,969 INFO L158 Benchmark]: Boogie Preprocessor took 37.06ms. Allocated memory is still 148.9MB. Free memory was 81.7MB in the beginning and 80.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:00:03,969 INFO L158 Benchmark]: RCFGBuilder took 870.87ms. Allocated memory was 148.9MB in the beginning and 186.6MB in the end (delta: 37.7MB). Free memory was 80.4MB in the beginning and 145.4MB in the end (delta: -65.0MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2023-11-21 21:00:03,970 INFO L158 Benchmark]: TraceAbstraction took 30208.26ms. Allocated memory was 186.6MB in the beginning and 9.5GB in the end (delta: 9.3GB). Free memory was 144.4MB in the beginning and 8.4GB in the end (delta: -8.3GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2023-11-21 21:00:03,970 INFO L158 Benchmark]: Witness Printer took 4.34ms. Allocated memory is still 9.5GB. Free memory is still 8.4GB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:00:03,972 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 148.9MB. Free memory is still 123.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 795.18ms. Allocated memory is still 148.9MB. Free memory was 104.4MB in the beginning and 84.2MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.00ms. Allocated memory is still 148.9MB. Free memory was 84.2MB in the beginning and 82.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.06ms. Allocated memory is still 148.9MB. Free memory was 81.7MB in the beginning and 80.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 870.87ms. Allocated memory was 148.9MB in the beginning and 186.6MB in the end (delta: 37.7MB). Free memory was 80.4MB in the beginning and 145.4MB in the end (delta: -65.0MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. * TraceAbstraction took 30208.26ms. Allocated memory was 186.6MB in the beginning and 9.5GB in the end (delta: 9.3GB). Free memory was 144.4MB in the beginning and 8.4GB in the end (delta: -8.3GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Witness Printer took 4.34ms. Allocated memory is still 9.5GB. Free memory is still 8.4GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 16. Possible FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, t1={8:0}, t2={6:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, t1={8:0}, t2={6:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=0, t1={8:0}, t2={6:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L724] 2 int l; VAL [arg={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, t1={8:0}, t2={6:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L724] 4 int l; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) [L738] CALL 4 reach_error() [L16] COND FALSE 4 !(0) VAL [r=0, w=1, x=3, y=0] [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [r=0, w=1, x=3, y=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 747]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 111 locations, 24 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 30.0s, OverallIterations: 15, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 27.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1307 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 984 mSDsluCounter, 274 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 171 mSDsCounter, 37 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2357 IncrementalHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 37 mSolverCounterUnsat, 103 mSDtfsCounter, 2357 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2032occurred in iteration=14, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 207 NumberOfCodeBlocks, 207 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 498 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-21 21:00:04,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:00:06,735 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:00:06,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 21:00:06,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:00:06,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:00:06,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:00:06,925 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:00:06,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:00:06,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:00:06,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:00:06,933 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:00:06,934 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:00:06,934 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:00:06,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:00:06,937 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:00:06,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:00:06,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:00:06,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:00:06,939 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 21:00:06,940 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 21:00:06,941 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 21:00:06,941 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:00:06,942 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 21:00:06,942 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 21:00:06,943 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 21:00:06,943 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 21:00:06,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:00:06,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:00:06,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:00:06,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:00:06,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:00:06,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:00:06,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:06,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:00:06,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:00:06,948 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 21:00:06,948 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 21:00:06,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:00:06,949 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:00:06,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:00:06,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:00:06,950 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 21:00:06,950 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_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2023-11-21 21:00:07,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:00:07,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:00:07,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:00:07,445 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:00:07,445 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:00:07,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-21 21:00:10,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:00:11,001 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:00:11,002 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2023-11-21 21:00:11,024 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data/400568e1b/7b5597d9c73d430cb95ecb66ffcb9b26/FLAG9a0c206bf [2023-11-21 21:00:11,043 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/data/400568e1b/7b5597d9c73d430cb95ecb66ffcb9b26 [2023-11-21 21:00:11,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:00:11,047 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:00:11,051 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:11,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:00:11,057 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:00:11,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505bc6d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11, skipping insertion in model container [2023-11-21 21:00:11,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,132 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:00:11,322 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 21:00:11,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:11,581 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:00:11,614 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 21:00:11,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:00:11,745 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:00:11,745 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:00:11,746 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 21:00:11,754 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:00:11,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11 WrapperNode [2023-11-21 21:00:11,766 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:00:11,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:11,768 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:00:11,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:00:11,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,881 INFO L138 Inliner]: procedures = 177, calls = 52, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 122 [2023-11-21 21:00:11,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:00:11,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:00:11,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:00:11,884 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:00:11,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,909 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,910 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,917 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,919 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,922 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,924 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:00:11,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:00:11,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:00:11,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:00:11,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (1/1) ... [2023-11-21 21:00:11,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:00:11,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:00:11,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:00:11,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:00:12,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 21:00:12,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 21:00:12,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:00:12,003 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-21 21:00:12,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-21 21:00:12,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:00:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:00:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 21:00:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 21:00:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 21:00:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:00:12,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:00:12,005 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-21 21:00:12,005 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-21 21:00:12,007 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 21:00:12,187 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:00:12,190 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:00:12,625 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:00:12,886 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:00:12,886 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 21:00:12,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:12 BoogieIcfgContainer [2023-11-21 21:00:12,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:00:12,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:00:12,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:00:12,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:00:12,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:00:11" (1/3) ... [2023-11-21 21:00:12,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f88312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:12, skipping insertion in model container [2023-11-21 21:00:12,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:11" (2/3) ... [2023-11-21 21:00:12,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f88312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:12, skipping insertion in model container [2023-11-21 21:00:12,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:12" (3/3) ... [2023-11-21 21:00:12,903 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-11-21 21:00:12,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:00:12,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-21 21:00:12,926 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 21:00:13,033 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-21 21:00:13,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 89 transitions, 206 flow [2023-11-21 21:00:13,133 INFO L124 PetriNetUnfolderBase]: 4/85 cut-off events. [2023-11-21 21:00:13,133 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-21 21:00:13,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 85 events. 4/85 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-21 21:00:13,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 89 transitions, 206 flow [2023-11-21 21:00:13,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 84 transitions, 192 flow [2023-11-21 21:00:13,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:00:13,179 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@796d171d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:00:13,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-21 21:00:13,184 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:00:13,184 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 21:00:13,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:00:13,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:00:13,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 21:00:13,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 21:00:13,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash 8690, now seen corresponding path program 1 times [2023-11-21 21:00:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:00:13,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747592648] [2023-11-21 21:00:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:13,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:00:13,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:00:13,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:00:13,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-21 21:00:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:13,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 21:00:13,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:13,501 INFO L349 Elim1Store]: treesize reduction 103, result has 12.7 percent of original size [2023-11-21 21:00:13,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-11-21 21:00:13,575 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-11-21 21:00:13,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2023-11-21 21:00:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:13,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:00:13,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:00:13,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747592648] [2023-11-21 21:00:13,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747592648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:13,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:13,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:00:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540910453] [2023-11-21 21:00:13,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:13,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:00:13,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:00:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:00:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:00:13,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 21:00:13,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-21 21:00:13,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:00:13,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 21:00:13,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:00:14,714 INFO L124 PetriNetUnfolderBase]: 1532/3656 cut-off events. [2023-11-21 21:00:14,716 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2023-11-21 21:00:14,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6092 conditions, 3656 events. 1532/3656 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 30910 event pairs, 1532 based on Foata normal form. 693/4033 useless extension candidates. Maximal degree in co-relation 5148. Up to 2205 conditions per place. [2023-11-21 21:00:14,766 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 24 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-21 21:00:14,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 76 transitions, 228 flow [2023-11-21 21:00:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:00:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:00:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-21 21:00:14,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7490636704119851 [2023-11-21 21:00:14,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-21 21:00:14,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-21 21:00:14,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:00:14,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-21 21:00:14,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2023-11-21 21:00:14,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 21:00:14,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2023-11-21 21:00:14,805 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 192 flow. Second operand 3 states and 200 transitions. [2023-11-21 21:00:14,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 76 transitions, 228 flow [2023-11-21 21:00:14,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 212 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-21 21:00:14,827 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 164 flow [2023-11-21 21:00:14,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-11-21 21:00:14,835 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -10 predicate places. [2023-11-21 21:00:14,835 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 164 flow [2023-11-21 21:00:14,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-21 21:00:14,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:00:14,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 21:00:14,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:00:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:00:15,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-21 21:00:15,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash 8691, now seen corresponding path program 1 times [2023-11-21 21:00:15,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:00:15,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694051736] [2023-11-21 21:00:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:15,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:00:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:00:15,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:00:15,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67ceb45c-1657-4415-9294-525eae24fa5d/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-21 21:00:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:15,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 21:00:15,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:00:15,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:15,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:15,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:15,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2023-11-21 21:00:15,265 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-21 21:00:15,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-11-21 21:00:15,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:15,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:15,353 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-11-21 21:00:15,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 16 [2023-11-21 21:00:15,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:00:15,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 21:00:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:00:15,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:00:15,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:00:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694051736] [2023-11-21 21:00:15,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694051736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:15,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:15,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:00:15,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726717904] [2023-11-21 21:00:15,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:15,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:00:15,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:00:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:00:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:00:15,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2023-11-21 21:00:15,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2023-11-21 21:00:15,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:00:15,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2023-11-21 21:00:15,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand