./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G 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 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:21:00,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:21:00,627 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:21:00,633 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:21:00,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:21:00,660 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:21:00,661 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:21:00,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:21:00,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:21:00,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:21:00,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:21:00,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:21:00,665 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:21:00,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:21:00,667 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:21:00,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:21:00,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:21:00,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:21:00,669 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:21:00,669 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:21:00,670 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:21:00,671 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:21:00,671 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:21:00,671 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:21:00,672 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:21:00,672 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:21:00,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:21:00,673 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:21:00,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:21:00,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:00,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:21:00,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:21:00,676 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:21:00,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:21:00,677 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:21:00,677 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:21:00,678 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:21:00,678 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:21:00,678 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_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc [2023-11-06 22:21:00,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:21:01,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:21:01,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:21:01,044 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:21:01,045 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:21:01,047 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-11-06 22:21:04,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:21:04,479 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:21:04,479 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-11-06 22:21:04,502 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/data/7cb7d77b9/1dd96622be374726b4e0cb4c1e523a92/FLAG40ea1ec1a [2023-11-06 22:21:04,526 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/data/7cb7d77b9/1dd96622be374726b4e0cb4c1e523a92 [2023-11-06 22:21:04,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:21:04,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:21:04,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:04,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:21:04,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:21:04,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:04" (1/1) ... [2023-11-06 22:21:04,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663efc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:04, skipping insertion in model container [2023-11-06 22:21:04,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:04" (1/1) ... [2023-11-06 22:21:04,633 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:21:05,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:05,083 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:21:05,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:21:05,191 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:21:05,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05 WrapperNode [2023-11-06 22:21:05,192 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:21:05,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:05,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:21:05,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:21:05,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,291 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 192 [2023-11-06 22:21:05,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:21:05,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:21:05,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:21:05,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:21:05,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,323 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,353 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:21:05,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:21:05,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:21:05,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:21:05,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (1/1) ... [2023-11-06 22:21:05,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:05,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:05,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:21:05,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84439b07-01ee-435c-9d64-415d740096c2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:21:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:21:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:21:05,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:21:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:21:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:21:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:21:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:21:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:21:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:21:05,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:21:05,522 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:21:05,743 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:21:05,746 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:21:06,343 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:21:06,765 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:21:06,765 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:21:06,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:06 BoogieIcfgContainer [2023-11-06 22:21:06,768 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:21:06,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:21:06,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:21:06,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:21:06,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:04" (1/3) ... [2023-11-06 22:21:06,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2382e8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:06, skipping insertion in model container [2023-11-06 22:21:06,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:05" (2/3) ... [2023-11-06 22:21:06,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2382e8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:06, skipping insertion in model container [2023-11-06 22:21:06,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:06" (3/3) ... [2023-11-06 22:21:06,785 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-11-06 22:21:06,808 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:21:06,809 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-06 22:21:06,809 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:21:06,982 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:21:07,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:21:07,159 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-06 22:21:07,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:21:07,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 179 events. 11/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 139. Up to 4 conditions per place. [2023-11-06 22:21:07,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:21:07,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 163 transitions, 330 flow [2023-11-06 22:21:07,184 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:21:07,197 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 22:21:07,202 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 22:21:07,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:21:07,274 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-06 22:21:07,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:21:07,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 179 events. 11/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 139. Up to 4 conditions per place. [2023-11-06 22:21:07,284 INFO L119 LiptonReduction]: Number of co-enabled transitions 4598 [2023-11-06 22:21:14,650 INFO L134 LiptonReduction]: Checked pairs total: 9118 [2023-11-06 22:21:14,651 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-11-06 22:21:14,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:21:14,684 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;@63eab465, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:21:14,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-06 22:21:14,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:21:14,687 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:21:14,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:21:14,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:14,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:21:14,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:21:14,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash 33368, now seen corresponding path program 1 times [2023-11-06 22:21:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:14,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979115775] [2023-11-06 22:21:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:15,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:15,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979115775] [2023-11-06 22:21:15,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979115775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:15,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:15,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:15,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799809975] [2023-11-06 22:21:15,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:15,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:15,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:15,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:15,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 335 [2023-11-06 22:21:15,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:15,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 335 [2023-11-06 22:21:15,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:15,433 INFO L124 PetriNetUnfolderBase]: 236/526 cut-off events. [2023-11-06 22:21:15,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:21:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 526 events. 236/526 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2353 event pairs, 119 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 1014. Up to 267 conditions per place. [2023-11-06 22:21:15,440 INFO L140 encePairwiseOnDemand]: 311/335 looper letters, 75 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-11-06 22:21:15,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 326 flow [2023-11-06 22:21:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-11-06 22:21:15,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43582089552238806 [2023-11-06 22:21:15,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-11-06 22:21:15,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-11-06 22:21:15,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:15,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-11-06 22:21:15,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,480 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 146 flow. Second operand 3 states and 438 transitions. [2023-11-06 22:21:15,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 326 flow [2023-11-06 22:21:15,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:21:15,486 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 132 flow [2023-11-06 22:21:15,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-11-06 22:21:15,492 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-11-06 22:21:15,493 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 132 flow [2023-11-06 22:21:15,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:15,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:21:15,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:21:15,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:21:15,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash 33366, now seen corresponding path program 1 times [2023-11-06 22:21:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315781172] [2023-11-06 22:21:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:15,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315781172] [2023-11-06 22:21:15,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315781172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:15,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:15,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:15,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758438102] [2023-11-06 22:21:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:15,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 335 [2023-11-06 22:21:15,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:15,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 335 [2023-11-06 22:21:15,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:15,874 INFO L124 PetriNetUnfolderBase]: 170/398 cut-off events. [2023-11-06 22:21:15,874 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-06 22:21:15,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 398 events. 170/398 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1680 event pairs, 118 based on Foata normal form. 60/317 useless extension candidates. Maximal degree in co-relation 895. Up to 380 conditions per place. [2023-11-06 22:21:15,878 INFO L140 encePairwiseOnDemand]: 333/335 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-11-06 22:21:15,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 226 flow [2023-11-06 22:21:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-06 22:21:15,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38308457711442784 [2023-11-06 22:21:15,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-06 22:21:15,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-06 22:21:15,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:15,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-06 22:21:15,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,891 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 132 flow. Second operand 3 states and 385 transitions. [2023-11-06 22:21:15,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 226 flow [2023-11-06 22:21:15,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:21:15,895 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 124 flow [2023-11-06 22:21:15,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-11-06 22:21:15,897 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-11-06 22:21:15,897 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 124 flow [2023-11-06 22:21:15,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:15,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:15,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:21:15,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:21:15,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:21:15,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash 32092666, now seen corresponding path program 1 times [2023-11-06 22:21:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:15,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057917470] [2023-11-06 22:21:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:16,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057917470] [2023-11-06 22:21:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057917470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:16,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:16,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:16,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417169278] [2023-11-06 22:21:16,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:16,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:16,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:16,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 335 [2023-11-06 22:21:16,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:16,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 335 [2023-11-06 22:21:16,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:16,434 INFO L124 PetriNetUnfolderBase]: 169/415 cut-off events. [2023-11-06 22:21:16,435 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-06 22:21:16,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 415 events. 169/415 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1837 event pairs, 110 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 912. Up to 238 conditions per place. [2023-11-06 22:21:16,439 INFO L140 encePairwiseOnDemand]: 330/335 looper letters, 70 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-11-06 22:21:16,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 324 flow [2023-11-06 22:21:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-06 22:21:16,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920398009950249 [2023-11-06 22:21:16,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-06 22:21:16,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-06 22:21:16,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:16,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-06 22:21:16,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,450 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 124 flow. Second operand 3 states and 394 transitions. [2023-11-06 22:21:16,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 324 flow [2023-11-06 22:21:16,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 323 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:16,453 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 140 flow [2023-11-06 22:21:16,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-11-06 22:21:16,455 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-11-06 22:21:16,455 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 140 flow [2023-11-06 22:21:16,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:16,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:21:16,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:21:16,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:21:16,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash 32092667, now seen corresponding path program 1 times [2023-11-06 22:21:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:16,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544954924] [2023-11-06 22:21:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:16,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:16,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:16,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544954924] [2023-11-06 22:21:16,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544954924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:16,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:16,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:16,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126768333] [2023-11-06 22:21:16,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:16,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:16,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:16,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:16,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 335 [2023-11-06 22:21:16,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:16,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 335 [2023-11-06 22:21:16,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:16,851 INFO L124 PetriNetUnfolderBase]: 165/419 cut-off events. [2023-11-06 22:21:16,852 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-06 22:21:16,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 419 events. 165/419 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1915 event pairs, 133 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 918. Up to 386 conditions per place. [2023-11-06 22:21:16,856 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-06 22:21:16,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 228 flow [2023-11-06 22:21:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-06 22:21:16,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38308457711442784 [2023-11-06 22:21:16,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-06 22:21:16,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-06 22:21:16,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:16,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-06 22:21:16,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,867 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 140 flow. Second operand 3 states and 385 transitions. [2023-11-06 22:21:16,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 228 flow [2023-11-06 22:21:16,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:16,870 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 135 flow [2023-11-06 22:21:16,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-11-06 22:21:16,872 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-11-06 22:21:16,872 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 135 flow [2023-11-06 22:21:16,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:16,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:16,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:21:16,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:21:16,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:21:16,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 32092813, now seen corresponding path program 1 times [2023-11-06 22:21:16,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:16,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304553726] [2023-11-06 22:21:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:16,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:17,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:17,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304553726] [2023-11-06 22:21:17,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304553726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:17,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:17,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:17,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604319666] [2023-11-06 22:21:17,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:17,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:17,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:17,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 335 [2023-11-06 22:21:17,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:17,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 335 [2023-11-06 22:21:17,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:17,279 INFO L124 PetriNetUnfolderBase]: 155/390 cut-off events. [2023-11-06 22:21:17,279 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-06 22:21:17,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 390 events. 155/390 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1730 event pairs, 123 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 851. Up to 360 conditions per place. [2023-11-06 22:21:17,283 INFO L140 encePairwiseOnDemand]: 331/335 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-06 22:21:17,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 215 flow [2023-11-06 22:21:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:17,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-11-06 22:21:17,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37512437810945276 [2023-11-06 22:21:17,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-11-06 22:21:17,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-11-06 22:21:17,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:17,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-11-06 22:21:17,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,294 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 135 flow. Second operand 3 states and 377 transitions. [2023-11-06 22:21:17,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 215 flow [2023-11-06 22:21:17,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:17,297 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 130 flow [2023-11-06 22:21:17,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-11-06 22:21:17,298 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-11-06 22:21:17,298 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 130 flow [2023-11-06 22:21:17,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:17,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:21:17,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:21:17,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:21:17,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:17,301 INFO L85 PathProgramCache]: Analyzing trace with hash 994877004, now seen corresponding path program 1 times [2023-11-06 22:21:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406103933] [2023-11-06 22:21:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406103933] [2023-11-06 22:21:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406103933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:17,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:17,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:17,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767050684] [2023-11-06 22:21:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:17,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:17,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:17,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 335 [2023-11-06 22:21:17,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:17,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 335 [2023-11-06 22:21:17,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:17,731 INFO L124 PetriNetUnfolderBase]: 151/365 cut-off events. [2023-11-06 22:21:17,731 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-06 22:21:17,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 365 events. 151/365 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1524 event pairs, 94 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 814. Up to 222 conditions per place. [2023-11-06 22:21:17,735 INFO L140 encePairwiseOnDemand]: 329/335 looper letters, 62 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-06 22:21:17,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 302 flow [2023-11-06 22:21:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-11-06 22:21:17,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761194029850746 [2023-11-06 22:21:17,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-11-06 22:21:17,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-11-06 22:21:17,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:17,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-11-06 22:21:17,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,749 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 130 flow. Second operand 3 states and 378 transitions. [2023-11-06 22:21:17,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 302 flow [2023-11-06 22:21:17,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:17,754 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 140 flow [2023-11-06 22:21:17,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-06 22:21:17,757 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2023-11-06 22:21:17,758 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 140 flow [2023-11-06 22:21:17,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:17,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:21:17,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:21:17,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:21:17,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash 776376315, now seen corresponding path program 1 times [2023-11-06 22:21:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:17,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233025334] [2023-11-06 22:21:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:21:17,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:21:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:21:17,821 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:21:17,821 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:21:17,822 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-06 22:21:17,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-06 22:21:17,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-06 22:21:17,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-06 22:21:17,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-06 22:21:17,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-06 22:21:17,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-06 22:21:17,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-06 22:21:17,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-06 22:21:17,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-06 22:21:17,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-06 22:21:17,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-06 22:21:17,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-06 22:21:17,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-06 22:21:17,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-06 22:21:17,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-06 22:21:17,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-06 22:21:17,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-06 22:21:17,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-06 22:21:17,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-06 22:21:17,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-06 22:21:17,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-06 22:21:17,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-06 22:21:17,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2023-11-06 22:21:17,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-06 22:21:17,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2023-11-06 22:21:17,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (55 of 82 remaining) [2023-11-06 22:21:17,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-06 22:21:17,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-06 22:21:17,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2023-11-06 22:21:17,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2023-11-06 22:21:17,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2023-11-06 22:21:17,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-06 22:21:17,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-06 22:21:17,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-06 22:21:17,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-06 22:21:17,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-06 22:21:17,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (44 of 82 remaining) [2023-11-06 22:21:17,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-06 22:21:17,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-06 22:21:17,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-06 22:21:17,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-06 22:21:17,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (39 of 82 remaining) [2023-11-06 22:21:17,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-06 22:21:17,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-06 22:21:17,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-06 22:21:17,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-06 22:21:17,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-06 22:21:17,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-06 22:21:17,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-06 22:21:17,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-06 22:21:17,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-06 22:21:17,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-06 22:21:17,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-06 22:21:17,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-06 22:21:17,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-06 22:21:17,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-06 22:21:17,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-06 22:21:17,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-06 22:21:17,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-06 22:21:17,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-06 22:21:17,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-06 22:21:17,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-06 22:21:17,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-06 22:21:17,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-06 22:21:17,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2023-11-06 22:21:17,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-06 22:21:17,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-06 22:21:17,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 82 remaining) [2023-11-06 22:21:17,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-06 22:21:17,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-06 22:21:17,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2023-11-06 22:21:17,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2023-11-06 22:21:17,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-06 22:21:17,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-06 22:21:17,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-06 22:21:17,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-06 22:21:17,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-06 22:21:17,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-06 22:21:17,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 82 remaining) [2023-11-06 22:21:17,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-06 22:21:17,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2023-11-06 22:21:17,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:21:17,864 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:17,872 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:21:17,873 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:21:17,996 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:21:18,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:21:18,071 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-06 22:21:18,072 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:21:18,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 319 events. 21/319 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 968 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 260. Up to 6 conditions per place. [2023-11-06 22:21:18,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:21:18,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 285 transitions, 580 flow [2023-11-06 22:21:18,085 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:21:18,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 22:21:18,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 22:21:18,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:21:18,154 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-06 22:21:18,154 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:21:18,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 319 events. 21/319 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 968 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 260. Up to 6 conditions per place. [2023-11-06 22:21:18,186 INFO L119 LiptonReduction]: Number of co-enabled transitions 38720 [2023-11-06 22:21:25,681 INFO L134 LiptonReduction]: Checked pairs total: 112955 [2023-11-06 22:21:25,681 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-11-06 22:21:25,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:21:25,686 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;@63eab465, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:21:25,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2023-11-06 22:21:25,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:21:25,689 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:21:25,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:21:25,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:25,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:21:25,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:25,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash 53617, now seen corresponding path program 1 times [2023-11-06 22:21:25,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:25,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844547525] [2023-11-06 22:21:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:25,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:25,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:25,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844547525] [2023-11-06 22:21:25,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844547525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:25,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:25,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:25,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803296071] [2023-11-06 22:21:25,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:25,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:25,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:25,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 511 [2023-11-06 22:21:25,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:25,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:25,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 511 [2023-11-06 22:21:25,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:28,182 INFO L124 PetriNetUnfolderBase]: 9315/15431 cut-off events. [2023-11-06 22:21:28,182 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-06 22:21:28,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30005 conditions, 15431 events. 9315/15431 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 127355 event pairs, 8280 based on Foata normal form. 222/6417 useless extension candidates. Maximal degree in co-relation 24400. Up to 14445 conditions per place. [2023-11-06 22:21:28,318 INFO L140 encePairwiseOnDemand]: 480/511 looper letters, 92 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-11-06 22:21:28,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 424 flow [2023-11-06 22:21:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-11-06 22:21:28,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45596868884540115 [2023-11-06 22:21:28,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-11-06 22:21:28,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-11-06 22:21:28,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:28,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-11-06 22:21:28,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:28,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:28,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:28,332 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 304 flow. Second operand 3 states and 699 transitions. [2023-11-06 22:21:28,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 424 flow [2023-11-06 22:21:28,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:21:28,341 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 240 flow [2023-11-06 22:21:28,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2023-11-06 22:21:28,344 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -27 predicate places. [2023-11-06 22:21:28,344 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 240 flow [2023-11-06 22:21:28,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:28,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:28,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:21:28,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:21:28,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:28,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 53618, now seen corresponding path program 1 times [2023-11-06 22:21:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175979122] [2023-11-06 22:21:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:28,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:28,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175979122] [2023-11-06 22:21:28,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175979122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:28,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:28,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:21:28,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42339885] [2023-11-06 22:21:28,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:28,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:21:28,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:21:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:21:28,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 511 [2023-11-06 22:21:28,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:28,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:28,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 511 [2023-11-06 22:21:28,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:32,349 INFO L124 PetriNetUnfolderBase]: 13947/23809 cut-off events. [2023-11-06 22:21:32,349 INFO L125 PetriNetUnfolderBase]: For 427/427 co-relation queries the response was YES. [2023-11-06 22:21:32,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45995 conditions, 23809 events. 13947/23809 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 1237. Compared 201401 event pairs, 6019 based on Foata normal form. 0/10541 useless extension candidates. Maximal degree in co-relation 45987. Up to 12142 conditions per place. [2023-11-06 22:21:32,518 INFO L140 encePairwiseOnDemand]: 504/511 looper letters, 177 selfloop transitions, 6 changer transitions 0/204 dead transitions. [2023-11-06 22:21:32,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 204 transitions, 791 flow [2023-11-06 22:21:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-11-06 22:21:32,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801043705153294 [2023-11-06 22:21:32,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-11-06 22:21:32,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-11-06 22:21:32,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:32,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-11-06 22:21:32,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:32,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:32,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:32,533 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 240 flow. Second operand 3 states and 736 transitions. [2023-11-06 22:21:32,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 204 transitions, 791 flow [2023-11-06 22:21:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:32,543 INFO L231 Difference]: Finished difference. Result has 114 places, 119 transitions, 285 flow [2023-11-06 22:21:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=114, PETRI_TRANSITIONS=119} [2023-11-06 22:21:32,547 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -24 predicate places. [2023-11-06 22:21:32,547 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 119 transitions, 285 flow [2023-11-06 22:21:32,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:32,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:32,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:21:32,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:21:32,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:32,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash 51570530, now seen corresponding path program 1 times [2023-11-06 22:21:32,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:32,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654329424] [2023-11-06 22:21:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:32,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:32,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654329424] [2023-11-06 22:21:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654329424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:32,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:32,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313568518] [2023-11-06 22:21:32,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:32,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:32,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:32,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 511 [2023-11-06 22:21:32,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 119 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:32,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:32,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 511 [2023-11-06 22:21:32,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:35,744 INFO L124 PetriNetUnfolderBase]: 12815/21554 cut-off events. [2023-11-06 22:21:35,744 INFO L125 PetriNetUnfolderBase]: For 8094/8094 co-relation queries the response was YES. [2023-11-06 22:21:35,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48834 conditions, 21554 events. 12815/21554 cut-off events. For 8094/8094 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 177815 event pairs, 9915 based on Foata normal form. 0/11455 useless extension candidates. Maximal degree in co-relation 48823. Up to 20161 conditions per place. [2023-11-06 22:21:35,921 INFO L140 encePairwiseOnDemand]: 506/511 looper letters, 93 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-11-06 22:21:35,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 465 flow [2023-11-06 22:21:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-11-06 22:21:35,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383561643835616 [2023-11-06 22:21:35,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-11-06 22:21:35,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-11-06 22:21:35,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:35,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-11-06 22:21:35,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:35,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:35,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:35,936 INFO L175 Difference]: Start difference. First operand has 114 places, 119 transitions, 285 flow. Second operand 3 states and 672 transitions. [2023-11-06 22:21:35,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 465 flow [2023-11-06 22:21:35,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:21:35,986 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 267 flow [2023-11-06 22:21:35,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2023-11-06 22:21:35,987 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -28 predicate places. [2023-11-06 22:21:35,987 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 267 flow [2023-11-06 22:21:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:21:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:21:35,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:35,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash 51570529, now seen corresponding path program 1 times [2023-11-06 22:21:35,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:35,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779197218] [2023-11-06 22:21:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:35,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:36,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:36,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779197218] [2023-11-06 22:21:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779197218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479171352] [2023-11-06 22:21:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:36,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:36,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 511 [2023-11-06 22:21:36,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:36,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:36,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 511 [2023-11-06 22:21:36,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:39,824 INFO L124 PetriNetUnfolderBase]: 15772/26960 cut-off events. [2023-11-06 22:21:39,824 INFO L125 PetriNetUnfolderBase]: For 4440/4440 co-relation queries the response was YES. [2023-11-06 22:21:39,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58308 conditions, 26960 events. 15772/26960 cut-off events. For 4440/4440 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 236847 event pairs, 7529 based on Foata normal form. 0/13049 useless extension candidates. Maximal degree in co-relation 58297. Up to 19202 conditions per place. [2023-11-06 22:21:40,002 INFO L140 encePairwiseOnDemand]: 502/511 looper letters, 163 selfloop transitions, 5 changer transitions 0/189 dead transitions. [2023-11-06 22:21:40,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 766 flow [2023-11-06 22:21:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-11-06 22:21:40,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690150032615786 [2023-11-06 22:21:40,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-11-06 22:21:40,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-11-06 22:21:40,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:40,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-11-06 22:21:40,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:40,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:40,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:40,015 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 267 flow. Second operand 3 states and 719 transitions. [2023-11-06 22:21:40,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 766 flow [2023-11-06 22:21:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 765 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:40,020 INFO L231 Difference]: Finished difference. Result has 112 places, 119 transitions, 313 flow [2023-11-06 22:21:40,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=112, PETRI_TRANSITIONS=119} [2023-11-06 22:21:40,022 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -26 predicate places. [2023-11-06 22:21:40,023 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 119 transitions, 313 flow [2023-11-06 22:21:40,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:40,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:40,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:21:40,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:21:40,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:40,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1980283410, now seen corresponding path program 1 times [2023-11-06 22:21:40,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42972345] [2023-11-06 22:21:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:40,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:40,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42972345] [2023-11-06 22:21:40,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42972345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:40,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:40,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462852206] [2023-11-06 22:21:40,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:40,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:40,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 511 [2023-11-06 22:21:40,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 119 transitions, 313 flow. Second operand has 4 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:40,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:40,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 511 [2023-11-06 22:21:40,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:43,145 INFO L124 PetriNetUnfolderBase]: 12993/22191 cut-off events. [2023-11-06 22:21:43,145 INFO L125 PetriNetUnfolderBase]: For 4987/4987 co-relation queries the response was YES. [2023-11-06 22:21:43,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49227 conditions, 22191 events. 12993/22191 cut-off events. For 4987/4987 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 188992 event pairs, 11013 based on Foata normal form. 0/11848 useless extension candidates. Maximal degree in co-relation 49214. Up to 20436 conditions per place. [2023-11-06 22:21:43,336 INFO L140 encePairwiseOnDemand]: 502/511 looper letters, 89 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2023-11-06 22:21:43,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 477 flow [2023-11-06 22:21:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-11-06 22:21:43,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279191128506197 [2023-11-06 22:21:43,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-11-06 22:21:43,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-11-06 22:21:43,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:43,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-11-06 22:21:43,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:43,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:43,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:43,351 INFO L175 Difference]: Start difference. First operand has 112 places, 119 transitions, 313 flow. Second operand 3 states and 656 transitions. [2023-11-06 22:21:43,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 477 flow [2023-11-06 22:21:43,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:43,359 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 294 flow [2023-11-06 22:21:43,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2023-11-06 22:21:43,361 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -33 predicate places. [2023-11-06 22:21:43,361 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 294 flow [2023-11-06 22:21:43,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:43,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:43,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:21:43,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:21:43,362 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:43,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1980283411, now seen corresponding path program 1 times [2023-11-06 22:21:43,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:43,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413805802] [2023-11-06 22:21:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:43,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:43,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:43,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413805802] [2023-11-06 22:21:43,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413805802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:43,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:43,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:21:43,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429625029] [2023-11-06 22:21:43,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:43,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 511 [2023-11-06 22:21:43,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:43,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:43,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 511 [2023-11-06 22:21:43,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:46,555 INFO L124 PetriNetUnfolderBase]: 12431/21255 cut-off events. [2023-11-06 22:21:46,555 INFO L125 PetriNetUnfolderBase]: For 4608/4608 co-relation queries the response was YES. [2023-11-06 22:21:46,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46914 conditions, 21255 events. 12431/21255 cut-off events. For 4608/4608 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 180370 event pairs, 6083 based on Foata normal form. 0/11496 useless extension candidates. Maximal degree in co-relation 46900. Up to 15668 conditions per place. [2023-11-06 22:21:46,730 INFO L140 encePairwiseOnDemand]: 500/511 looper letters, 143 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2023-11-06 22:21:46,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 713 flow [2023-11-06 22:21:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:21:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:21:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-11-06 22:21:46,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441617742987606 [2023-11-06 22:21:46,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-11-06 22:21:46,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-11-06 22:21:46,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:46,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-11-06 22:21:46,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 511.0) internal successors, (2044), 4 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,748 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 294 flow. Second operand 3 states and 677 transitions. [2023-11-06 22:21:46,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 713 flow [2023-11-06 22:21:46,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 169 transitions, 712 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:21:46,757 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 320 flow [2023-11-06 22:21:46,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-11-06 22:21:46,759 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -31 predicate places. [2023-11-06 22:21:46,759 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 320 flow [2023-11-06 22:21:46,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:46,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:46,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:21:46,761 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:46,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1851794032, now seen corresponding path program 1 times [2023-11-06 22:21:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:46,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353862599] [2023-11-06 22:21:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:46,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:21:46,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:46,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353862599] [2023-11-06 22:21:46,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353862599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:21:46,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:21:46,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:21:46,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826600371] [2023-11-06 22:21:46,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:21:46,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:21:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:21:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:21:46,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 511 [2023-11-06 22:21:46,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:46,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:46,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 511 [2023-11-06 22:21:46,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:50,318 INFO L124 PetriNetUnfolderBase]: 13712/23142 cut-off events. [2023-11-06 22:21:50,319 INFO L125 PetriNetUnfolderBase]: For 6117/6117 co-relation queries the response was YES. [2023-11-06 22:21:50,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52501 conditions, 23142 events. 13712/23142 cut-off events. For 6117/6117 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 193082 event pairs, 8508 based on Foata normal form. 8/13901 useless extension candidates. Maximal degree in co-relation 52485. Up to 19077 conditions per place. [2023-11-06 22:21:50,477 INFO L140 encePairwiseOnDemand]: 500/511 looper letters, 141 selfloop transitions, 9 changer transitions 0/168 dead transitions. [2023-11-06 22:21:50,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 788 flow [2023-11-06 22:21:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:21:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:21:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1081 transitions. [2023-11-06 22:21:50,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42309197651663405 [2023-11-06 22:21:50,484 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1081 transitions. [2023-11-06 22:21:50,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1081 transitions. [2023-11-06 22:21:50,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:50,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1081 transitions. [2023-11-06 22:21:50,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.2) internal successors, (1081), 5 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:50,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 511.0) internal successors, (3066), 6 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:50,499 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 511.0) internal successors, (3066), 6 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:50,499 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 320 flow. Second operand 5 states and 1081 transitions. [2023-11-06 22:21:50,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 788 flow [2023-11-06 22:21:50,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 168 transitions, 774 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:21:50,509 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 390 flow [2023-11-06 22:21:50,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=511, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=390, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2023-11-06 22:21:50,511 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -25 predicate places. [2023-11-06 22:21:50,511 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 390 flow [2023-11-06 22:21:50,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:50,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:50,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:21:50,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:21:50,513 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:21:50,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 227094421, now seen corresponding path program 1 times [2023-11-06 22:21:50,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:50,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367476513] [2023-11-06 22:21:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:50,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:21:50,531 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:21:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:21:50,562 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:21:50,565 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:21:50,565 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (120 of 121 remaining) [2023-11-06 22:21:50,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 121 remaining) [2023-11-06 22:21:50,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 121 remaining) [2023-11-06 22:21:50,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 121 remaining) [2023-11-06 22:21:50,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 121 remaining) [2023-11-06 22:21:50,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 121 remaining) [2023-11-06 22:21:50,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 121 remaining) [2023-11-06 22:21:50,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 121 remaining) [2023-11-06 22:21:50,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 121 remaining) [2023-11-06 22:21:50,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 121 remaining) [2023-11-06 22:21:50,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 121 remaining) [2023-11-06 22:21:50,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 121 remaining) [2023-11-06 22:21:50,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 121 remaining) [2023-11-06 22:21:50,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 121 remaining) [2023-11-06 22:21:50,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 121 remaining) [2023-11-06 22:21:50,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 121 remaining) [2023-11-06 22:21:50,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 121 remaining) [2023-11-06 22:21:50,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 121 remaining) [2023-11-06 22:21:50,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 121 remaining) [2023-11-06 22:21:50,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 121 remaining) [2023-11-06 22:21:50,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 121 remaining) [2023-11-06 22:21:50,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 121 remaining) [2023-11-06 22:21:50,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 121 remaining) [2023-11-06 22:21:50,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (97 of 121 remaining) [2023-11-06 22:21:50,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 121 remaining) [2023-11-06 22:21:50,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 121 remaining) [2023-11-06 22:21:50,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (94 of 121 remaining) [2023-11-06 22:21:50,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 121 remaining) [2023-11-06 22:21:50,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 121 remaining) [2023-11-06 22:21:50,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 121 remaining) [2023-11-06 22:21:50,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 121 remaining) [2023-11-06 22:21:50,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 121 remaining) [2023-11-06 22:21:50,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 121 remaining) [2023-11-06 22:21:50,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 121 remaining) [2023-11-06 22:21:50,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 121 remaining) [2023-11-06 22:21:50,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 121 remaining) [2023-11-06 22:21:50,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 121 remaining) [2023-11-06 22:21:50,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (83 of 121 remaining) [2023-11-06 22:21:50,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 121 remaining) [2023-11-06 22:21:50,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 121 remaining) [2023-11-06 22:21:50,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 121 remaining) [2023-11-06 22:21:50,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 121 remaining) [2023-11-06 22:21:50,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (78 of 121 remaining) [2023-11-06 22:21:50,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 121 remaining) [2023-11-06 22:21:50,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 121 remaining) [2023-11-06 22:21:50,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 121 remaining) [2023-11-06 22:21:50,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 121 remaining) [2023-11-06 22:21:50,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 121 remaining) [2023-11-06 22:21:50,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 121 remaining) [2023-11-06 22:21:50,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 121 remaining) [2023-11-06 22:21:50,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 121 remaining) [2023-11-06 22:21:50,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 121 remaining) [2023-11-06 22:21:50,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 121 remaining) [2023-11-06 22:21:50,576 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 121 remaining) [2023-11-06 22:21:50,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 121 remaining) [2023-11-06 22:21:50,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 121 remaining) [2023-11-06 22:21:50,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 121 remaining) [2023-11-06 22:21:50,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 121 remaining) [2023-11-06 22:21:50,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 121 remaining) [2023-11-06 22:21:50,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 121 remaining) [2023-11-06 22:21:50,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 121 remaining) [2023-11-06 22:21:50,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 121 remaining) [2023-11-06 22:21:50,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 121 remaining) [2023-11-06 22:21:50,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 121 remaining) [2023-11-06 22:21:50,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 121 remaining) [2023-11-06 22:21:50,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 121 remaining) [2023-11-06 22:21:50,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 121 remaining) [2023-11-06 22:21:50,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 121 remaining) [2023-11-06 22:21:50,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 121 remaining) [2023-11-06 22:21:50,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 121 remaining) [2023-11-06 22:21:50,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 121 remaining) [2023-11-06 22:21:50,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 121 remaining) [2023-11-06 22:21:50,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 121 remaining) [2023-11-06 22:21:50,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 121 remaining) [2023-11-06 22:21:50,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 121 remaining) [2023-11-06 22:21:50,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 121 remaining) [2023-11-06 22:21:50,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 121 remaining) [2023-11-06 22:21:50,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 121 remaining) [2023-11-06 22:21:50,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 121 remaining) [2023-11-06 22:21:50,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (41 of 121 remaining) [2023-11-06 22:21:50,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 121 remaining) [2023-11-06 22:21:50,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 121 remaining) [2023-11-06 22:21:50,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 121 remaining) [2023-11-06 22:21:50,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 121 remaining) [2023-11-06 22:21:50,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 121 remaining) [2023-11-06 22:21:50,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 121 remaining) [2023-11-06 22:21:50,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 121 remaining) [2023-11-06 22:21:50,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 121 remaining) [2023-11-06 22:21:50,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 121 remaining) [2023-11-06 22:21:50,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 121 remaining) [2023-11-06 22:21:50,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 121 remaining) [2023-11-06 22:21:50,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 121 remaining) [2023-11-06 22:21:50,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 121 remaining) [2023-11-06 22:21:50,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 121 remaining) [2023-11-06 22:21:50,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 121 remaining) [2023-11-06 22:21:50,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 121 remaining) [2023-11-06 22:21:50,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 121 remaining) [2023-11-06 22:21:50,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 121 remaining) [2023-11-06 22:21:50,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 121 remaining) [2023-11-06 22:21:50,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 121 remaining) [2023-11-06 22:21:50,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 121 remaining) [2023-11-06 22:21:50,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 121 remaining) [2023-11-06 22:21:50,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 121 remaining) [2023-11-06 22:21:50,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 121 remaining) [2023-11-06 22:21:50,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 121 remaining) [2023-11-06 22:21:50,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 121 remaining) [2023-11-06 22:21:50,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 121 remaining) [2023-11-06 22:21:50,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 121 remaining) [2023-11-06 22:21:50,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 121 remaining) [2023-11-06 22:21:50,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 121 remaining) [2023-11-06 22:21:50,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 121 remaining) [2023-11-06 22:21:50,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 121 remaining) [2023-11-06 22:21:50,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 121 remaining) [2023-11-06 22:21:50,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 121 remaining) [2023-11-06 22:21:50,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 121 remaining) [2023-11-06 22:21:50,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 121 remaining) [2023-11-06 22:21:50,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 121 remaining) [2023-11-06 22:21:50,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 121 remaining) [2023-11-06 22:21:50,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 121 remaining) [2023-11-06 22:21:50,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 121 remaining) [2023-11-06 22:21:50,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 121 remaining) [2023-11-06 22:21:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:21:50,590 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:50,591 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:21:50,592 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:21:50,729 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:21:50,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:21:50,870 INFO L124 PetriNetUnfolderBase]: 31/459 cut-off events. [2023-11-06 22:21:50,870 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:21:50,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 459 events. 31/459 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1773 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 381. Up to 8 conditions per place. [2023-11-06 22:21:50,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:21:50,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 407 transitions, 832 flow [2023-11-06 22:21:50,904 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:21:50,904 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 407 transitions, 832 flow [2023-11-06 22:21:50,904 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 407 transitions, 832 flow [2023-11-06 22:21:50,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:21:51,029 INFO L124 PetriNetUnfolderBase]: 31/459 cut-off events. [2023-11-06 22:21:51,030 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:21:51,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 459 events. 31/459 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1773 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 381. Up to 8 conditions per place. [2023-11-06 22:21:51,091 INFO L119 LiptonReduction]: Number of co-enabled transitions 102366 [2023-11-06 22:22:03,945 INFO L134 LiptonReduction]: Checked pairs total: 356201 [2023-11-06 22:22:03,946 INFO L136 LiptonReduction]: Total number of compositions: 347 [2023-11-06 22:22:03,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:22:03,949 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;@63eab465, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:22:03,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 160 error locations. [2023-11-06 22:22:03,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:22:03,951 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:22:03,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:22:03,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:03,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:22:03,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 157 more)] === [2023-11-06 22:22:03,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:03,952 INFO L85 PathProgramCache]: Analyzing trace with hash 81645, now seen corresponding path program 1 times [2023-11-06 22:22:03,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:03,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527953596] [2023-11-06 22:22:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527953596] [2023-11-06 22:22:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527953596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:03,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:03,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940881106] [2023-11-06 22:22:03,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:03,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:03,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:04,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 754 [2023-11-06 22:22:04,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 216 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:04,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:04,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 754 [2023-11-06 22:22:04,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand