./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/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_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/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_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/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 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:52:57,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:52:57,986 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:52:57,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:52:57,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:52:58,039 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:52:58,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:52:58,041 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:52:58,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:52:58,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:52:58,050 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:52:58,051 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:52:58,051 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:52:58,054 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:52:58,054 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:52:58,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:52:58,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:52:58,056 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:52:58,056 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:52:58,057 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:52:58,057 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:52:58,058 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:52:58,058 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:52:58,058 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:52:58,059 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:52:58,059 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:52:58,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:52:58,060 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:52:58,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:52:58,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:58,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:52:58,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:52:58,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:52:58,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:52:58,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:52:58,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:52:58,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:52:58,063 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:52:58,064 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_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 [2023-11-06 22:52:58,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:52:58,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:52:58,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:52:58,343 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:52:58,343 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:52:58,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i [2023-11-06 22:53:01,533 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:53:01,829 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:53:01,829 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-1.i [2023-11-06 22:53:01,858 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/data/5b6df7946/89a167ff35cd4a38816220026b59bbc5/FLAGbcb9ef4ae [2023-11-06 22:53:01,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/data/5b6df7946/89a167ff35cd4a38816220026b59bbc5 [2023-11-06 22:53:01,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:53:01,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:53:01,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:53:01,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:53:01,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:53:01,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:01" (1/1) ... [2023-11-06 22:53:01,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35952867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:01, skipping insertion in model container [2023-11-06 22:53:01,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:01" (1/1) ... [2023-11-06 22:53:01,931 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:53:02,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:53:02,363 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:53:02,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:53:02,455 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:53:02,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02 WrapperNode [2023-11-06 22:53:02,456 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:53:02,457 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:53:02,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:53:02,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:53:02,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,481 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,520 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 192 [2023-11-06 22:53:02,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:53:02,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:53:02,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:53:02,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:53:02,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,617 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:53:02,618 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:53:02,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:53:02,618 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:53:02,619 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (1/1) ... [2023-11-06 22:53:02,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:53:02,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:02,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:53:02,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d2e001f-ef8e-45e8-b4be-8da2aacd9660/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:53:02,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:53:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:53:02,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:53:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:53:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:53:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:53:02,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:53:02,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:53:02,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:53:02,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:53:02,725 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 22:53:02,869 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:53:02,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:53:03,308 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:53:03,682 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:53:03,682 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:53:03,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:03 BoogieIcfgContainer [2023-11-06 22:53:03,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:53:03,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:53:03,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:53:03,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:53:03,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:01" (1/3) ... [2023-11-06 22:53:03,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21dce165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:03, skipping insertion in model container [2023-11-06 22:53:03,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:02" (2/3) ... [2023-11-06 22:53:03,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21dce165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:03, skipping insertion in model container [2023-11-06 22:53:03,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:03" (3/3) ... [2023-11-06 22:53:03,701 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-11-06 22:53:03,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:53:03,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-06 22:53:03,725 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:53:03,893 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:53:03,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:53:04,072 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-06 22:53:04,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:53:04,083 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 22:53:04,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:53:04,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 163 transitions, 330 flow [2023-11-06 22:53:04,100 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:53:04,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 22:53:04,114 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 22:53:04,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:53:04,182 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-06 22:53:04,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:53:04,188 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 22:53:04,192 INFO L119 LiptonReduction]: Number of co-enabled transitions 4598 [2023-11-06 22:53:11,679 INFO L134 LiptonReduction]: Checked pairs total: 9118 [2023-11-06 22:53:11,681 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-11-06 22:53:11,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:53:11,712 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;@12be3bee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:53:11,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-06 22:53:11,716 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:53:11,716 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:53:11,716 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:53:11,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:11,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:53:11,718 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 22:53:11,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash 33368, now seen corresponding path program 1 times [2023-11-06 22:53:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:11,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181339347] [2023-11-06 22:53:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:11,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:12,055 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 22:53:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181339347] [2023-11-06 22:53:12,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181339347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:12,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:12,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:53:12,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957232344] [2023-11-06 22:53:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:12,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:12,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:12,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 335 [2023-11-06 22:53:12,169 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 22:53:12,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:12,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 335 [2023-11-06 22:53:12,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:12,454 INFO L124 PetriNetUnfolderBase]: 236/526 cut-off events. [2023-11-06 22:53:12,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:53:12,455 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 22:53:12,463 INFO L140 encePairwiseOnDemand]: 311/335 looper letters, 75 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-11-06 22:53:12,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 326 flow [2023-11-06 22:53:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-11-06 22:53:12,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43582089552238806 [2023-11-06 22:53:12,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-11-06 22:53:12,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-11-06 22:53:12,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:12,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-11-06 22:53:12,501 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 22:53:12,509 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 22:53:12,511 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 22:53:12,512 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 146 flow. Second operand 3 states and 438 transitions. [2023-11-06 22:53:12,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 326 flow [2023-11-06 22:53:12,516 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 22:53:12,520 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 132 flow [2023-11-06 22:53:12,522 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 22:53:12,529 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-11-06 22:53:12,529 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 132 flow [2023-11-06 22:53:12,530 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 22:53:12,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:12,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:53:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:53:12,531 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 22:53:12,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash 33366, now seen corresponding path program 1 times [2023-11-06 22:53:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:12,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487452074] [2023-11-06 22:53:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:12,655 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 22:53:12,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487452074] [2023-11-06 22:53:12,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487452074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:12,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:12,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:53:12,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643353532] [2023-11-06 22:53:12,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:12,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:12,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:12,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 335 [2023-11-06 22:53:12,701 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 22:53:12,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:12,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 335 [2023-11-06 22:53:12,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:12,839 INFO L124 PetriNetUnfolderBase]: 170/398 cut-off events. [2023-11-06 22:53:12,839 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-06 22:53:12,840 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 22:53:12,843 INFO L140 encePairwiseOnDemand]: 333/335 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-11-06 22:53:12,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 226 flow [2023-11-06 22:53:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-06 22:53:12,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38308457711442784 [2023-11-06 22:53:12,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-06 22:53:12,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-06 22:53:12,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:12,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-06 22:53:12,849 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 22:53:12,852 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 22:53:12,853 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 22:53:12,854 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 132 flow. Second operand 3 states and 385 transitions. [2023-11-06 22:53:12,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 226 flow [2023-11-06 22:53:12,857 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 22:53:12,859 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 124 flow [2023-11-06 22:53:12,859 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 22:53:12,860 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-11-06 22:53:12,860 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 124 flow [2023-11-06 22:53:12,861 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 22:53:12,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:12,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:53:12,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:53:12,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:53:12,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:12,863 INFO L85 PathProgramCache]: Analyzing trace with hash 32092666, now seen corresponding path program 1 times [2023-11-06 22:53:12,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:12,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009196272] [2023-11-06 22:53:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:12,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:13,066 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 22:53:13,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:13,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009196272] [2023-11-06 22:53:13,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009196272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:13,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:13,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:13,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030003611] [2023-11-06 22:53:13,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:13,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 335 [2023-11-06 22:53:13,167 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 22:53:13,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:13,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 335 [2023-11-06 22:53:13,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:13,406 INFO L124 PetriNetUnfolderBase]: 169/415 cut-off events. [2023-11-06 22:53:13,406 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-06 22:53:13,407 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 22:53:13,411 INFO L140 encePairwiseOnDemand]: 330/335 looper letters, 70 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-11-06 22:53:13,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 324 flow [2023-11-06 22:53:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-06 22:53:13,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920398009950249 [2023-11-06 22:53:13,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-06 22:53:13,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-06 22:53:13,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:13,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-06 22:53:13,416 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 22:53:13,419 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 22:53:13,421 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 22:53:13,421 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 124 flow. Second operand 3 states and 394 transitions. [2023-11-06 22:53:13,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 324 flow [2023-11-06 22:53:13,423 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 22:53:13,425 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 140 flow [2023-11-06 22:53:13,425 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 22:53:13,426 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-11-06 22:53:13,426 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 140 flow [2023-11-06 22:53:13,427 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 22:53:13,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:13,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:53:13,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:53:13,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:53:13,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 32092667, now seen corresponding path program 1 times [2023-11-06 22:53:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888026491] [2023-11-06 22:53:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:13,559 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 22:53:13,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:13,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888026491] [2023-11-06 22:53:13,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888026491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:13,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:13,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:13,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845263617] [2023-11-06 22:53:13,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:13,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:13,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:13,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 335 [2023-11-06 22:53:13,637 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 22:53:13,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:13,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 335 [2023-11-06 22:53:13,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:13,778 INFO L124 PetriNetUnfolderBase]: 165/419 cut-off events. [2023-11-06 22:53:13,778 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-06 22:53:13,779 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 22:53:13,782 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-06 22:53:13,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 228 flow [2023-11-06 22:53:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-06 22:53:13,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38308457711442784 [2023-11-06 22:53:13,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-06 22:53:13,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-06 22:53:13,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:13,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-06 22:53:13,787 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 22:53:13,790 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 22:53:13,791 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 22:53:13,791 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 140 flow. Second operand 3 states and 385 transitions. [2023-11-06 22:53:13,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 228 flow [2023-11-06 22:53:13,793 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 22:53:13,794 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 135 flow [2023-11-06 22:53:13,795 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 22:53:13,796 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-11-06 22:53:13,796 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 135 flow [2023-11-06 22:53:13,796 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 22:53:13,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:13,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:53:13,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:53:13,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:53:13,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 32092813, now seen corresponding path program 1 times [2023-11-06 22:53:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:13,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114490845] [2023-11-06 22:53:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:13,983 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 22:53:13,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114490845] [2023-11-06 22:53:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114490845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:13,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:13,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:13,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695742478] [2023-11-06 22:53:13,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:13,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:13,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:13,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:14,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 335 [2023-11-06 22:53:14,058 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 22:53:14,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:14,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 335 [2023-11-06 22:53:14,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:14,191 INFO L124 PetriNetUnfolderBase]: 155/390 cut-off events. [2023-11-06 22:53:14,191 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-06 22:53:14,192 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 22:53:14,195 INFO L140 encePairwiseOnDemand]: 331/335 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-06 22:53:14,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 215 flow [2023-11-06 22:53:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-11-06 22:53:14,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37512437810945276 [2023-11-06 22:53:14,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-11-06 22:53:14,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-11-06 22:53:14,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:14,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-11-06 22:53:14,225 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 22:53:14,228 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 22:53:14,229 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 22:53:14,230 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 135 flow. Second operand 3 states and 377 transitions. [2023-11-06 22:53:14,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 215 flow [2023-11-06 22:53:14,231 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 22:53:14,232 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 130 flow [2023-11-06 22:53:14,233 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 22:53:14,234 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-11-06 22:53:14,234 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 130 flow [2023-11-06 22:53:14,235 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 22:53:14,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:14,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:53:14,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:53:14,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:53:14,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash 994877004, now seen corresponding path program 1 times [2023-11-06 22:53:14,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:14,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431856284] [2023-11-06 22:53:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:14,318 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 22:53:14,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:14,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431856284] [2023-11-06 22:53:14,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431856284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:14,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:14,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990753861] [2023-11-06 22:53:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:14,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:14,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:14,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 335 [2023-11-06 22:53:14,401 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 22:53:14,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:14,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 335 [2023-11-06 22:53:14,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:14,577 INFO L124 PetriNetUnfolderBase]: 151/365 cut-off events. [2023-11-06 22:53:14,577 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-06 22:53:14,578 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 22:53:14,580 INFO L140 encePairwiseOnDemand]: 329/335 looper letters, 62 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-06 22:53:14,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 302 flow [2023-11-06 22:53:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-11-06 22:53:14,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761194029850746 [2023-11-06 22:53:14,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-11-06 22:53:14,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-11-06 22:53:14,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:14,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-11-06 22:53:14,586 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 22:53:14,589 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 22:53:14,590 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 22:53:14,590 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 130 flow. Second operand 3 states and 378 transitions. [2023-11-06 22:53:14,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 302 flow [2023-11-06 22:53:14,592 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 22:53:14,595 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 140 flow [2023-11-06 22:53:14,595 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 22:53:14,597 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2023-11-06 22:53:14,598 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 140 flow [2023-11-06 22:53:14,599 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 22:53:14,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:14,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:53:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:53:14,599 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 22:53:14,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 776376315, now seen corresponding path program 1 times [2023-11-06 22:53:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:14,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801138298] [2023-11-06 22:53:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:14,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:53:14,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:53:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:53:14,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:53:14,654 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:53:14,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-06 22:53:14,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-06 22:53:14,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-06 22:53:14,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-06 22:53:14,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-06 22:53:14,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-06 22:53:14,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-06 22:53:14,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-06 22:53:14,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-06 22:53:14,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-06 22:53:14,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-06 22:53:14,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-06 22:53:14,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-06 22:53:14,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-06 22:53:14,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-06 22:53:14,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-06 22:53:14,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-06 22:53:14,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-06 22:53:14,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-06 22:53:14,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-06 22:53:14,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-06 22:53:14,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-06 22:53:14,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-06 22:53:14,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2023-11-06 22:53:14,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-06 22:53:14,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2023-11-06 22:53:14,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (55 of 82 remaining) [2023-11-06 22:53:14,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-06 22:53:14,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-06 22:53:14,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2023-11-06 22:53:14,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2023-11-06 22:53:14,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2023-11-06 22:53:14,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-06 22:53:14,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-06 22:53:14,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-06 22:53:14,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-06 22:53:14,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-06 22:53:14,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (44 of 82 remaining) [2023-11-06 22:53:14,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-06 22:53:14,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-06 22:53:14,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-06 22:53:14,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-06 22:53:14,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (39 of 82 remaining) [2023-11-06 22:53:14,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-06 22:53:14,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-06 22:53:14,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-06 22:53:14,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-06 22:53:14,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-06 22:53:14,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-06 22:53:14,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-06 22:53:14,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-06 22:53:14,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-06 22:53:14,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-06 22:53:14,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-06 22:53:14,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-06 22:53:14,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-06 22:53:14,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-06 22:53:14,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-06 22:53:14,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-06 22:53:14,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-06 22:53:14,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-06 22:53:14,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-06 22:53:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-06 22:53:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-06 22:53:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-06 22:53:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2023-11-06 22:53:14,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-06 22:53:14,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-06 22:53:14,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 82 remaining) [2023-11-06 22:53:14,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-06 22:53:14,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-06 22:53:14,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2023-11-06 22:53:14,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2023-11-06 22:53:14,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-06 22:53:14,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-06 22:53:14,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-06 22:53:14,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-06 22:53:14,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-06 22:53:14,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-06 22:53:14,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 82 remaining) [2023-11-06 22:53:14,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-06 22:53:14,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2023-11-06 22:53:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:53:14,686 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:14,690 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:53:14,690 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:53:14,832 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:53:14,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:53:14,910 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-06 22:53:14,910 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:53:14,918 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 22:53:14,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:53:14,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 285 transitions, 580 flow [2023-11-06 22:53:14,954 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:53:14,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 22:53:14,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 22:53:14,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:53:15,040 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-06 22:53:15,041 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:53:15,047 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 22:53:15,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 38720 [2023-11-06 22:53:22,567 INFO L134 LiptonReduction]: Checked pairs total: 112955 [2023-11-06 22:53:22,568 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-11-06 22:53:22,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:53:22,571 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;@12be3bee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:53:22,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2023-11-06 22:53:22,572 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:53:22,573 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:53:22,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:53:22,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:22,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:53:22,573 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 22:53:22,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash 53617, now seen corresponding path program 1 times [2023-11-06 22:53:22,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366964675] [2023-11-06 22:53:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:22,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:22,615 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 22:53:22,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:22,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366964675] [2023-11-06 22:53:22,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366964675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:22,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:22,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:53:22,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746229764] [2023-11-06 22:53:22,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:22,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:22,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:22,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 511 [2023-11-06 22:53:22,668 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 22:53:22,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:22,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 511 [2023-11-06 22:53:22,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:25,207 INFO L124 PetriNetUnfolderBase]: 9315/15431 cut-off events. [2023-11-06 22:53:25,208 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-06 22:53:25,229 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 22:53:25,342 INFO L140 encePairwiseOnDemand]: 480/511 looper letters, 92 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-11-06 22:53:25,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 424 flow [2023-11-06 22:53:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-11-06 22:53:25,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45596868884540115 [2023-11-06 22:53:25,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-11-06 22:53:25,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-11-06 22:53:25,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:25,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-11-06 22:53:25,350 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 22:53:25,353 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 22:53:25,354 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 22:53:25,355 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 304 flow. Second operand 3 states and 699 transitions. [2023-11-06 22:53:25,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 424 flow [2023-11-06 22:53:25,359 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 22:53:25,364 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 240 flow [2023-11-06 22:53:25,365 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 22:53:25,367 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -27 predicate places. [2023-11-06 22:53:25,367 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 240 flow [2023-11-06 22:53:25,369 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 22:53:25,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:25,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:53:25,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:53:25,370 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 22:53:25,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:25,371 INFO L85 PathProgramCache]: Analyzing trace with hash 53618, now seen corresponding path program 1 times [2023-11-06 22:53:25,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:25,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920066505] [2023-11-06 22:53:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:25,408 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 22:53:25,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:25,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920066505] [2023-11-06 22:53:25,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920066505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:25,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:25,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:53:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902215575] [2023-11-06 22:53:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:25,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 511 [2023-11-06 22:53:25,481 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 22:53:25,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:25,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 511 [2023-11-06 22:53:25,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:29,016 INFO L124 PetriNetUnfolderBase]: 13947/23809 cut-off events. [2023-11-06 22:53:29,017 INFO L125 PetriNetUnfolderBase]: For 427/427 co-relation queries the response was YES. [2023-11-06 22:53:29,053 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 22:53:29,283 INFO L140 encePairwiseOnDemand]: 504/511 looper letters, 177 selfloop transitions, 6 changer transitions 0/204 dead transitions. [2023-11-06 22:53:29,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 204 transitions, 791 flow [2023-11-06 22:53:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-11-06 22:53:29,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801043705153294 [2023-11-06 22:53:29,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-11-06 22:53:29,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-11-06 22:53:29,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:29,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-11-06 22:53:29,291 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 22:53:29,294 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 22:53:29,298 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 22:53:29,298 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 240 flow. Second operand 3 states and 736 transitions. [2023-11-06 22:53:29,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 204 transitions, 791 flow [2023-11-06 22:53:29,300 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 22:53:29,303 INFO L231 Difference]: Finished difference. Result has 114 places, 119 transitions, 285 flow [2023-11-06 22:53:29,304 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 22:53:29,306 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -24 predicate places. [2023-11-06 22:53:29,306 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 119 transitions, 285 flow [2023-11-06 22:53:29,307 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 22:53:29,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:29,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:53:29,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:53:29,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:53:29,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash 51570530, now seen corresponding path program 1 times [2023-11-06 22:53:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758310542] [2023-11-06 22:53:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:29,418 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 22:53:29,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:29,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758310542] [2023-11-06 22:53:29,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758310542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:29,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:29,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:29,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135117985] [2023-11-06 22:53:29,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:29,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:29,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:29,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:29,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 511 [2023-11-06 22:53:29,520 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 22:53:29,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:29,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 511 [2023-11-06 22:53:29,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:32,586 INFO L124 PetriNetUnfolderBase]: 12815/21554 cut-off events. [2023-11-06 22:53:32,586 INFO L125 PetriNetUnfolderBase]: For 8094/8094 co-relation queries the response was YES. [2023-11-06 22:53:32,612 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 22:53:32,713 INFO L140 encePairwiseOnDemand]: 506/511 looper letters, 93 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-11-06 22:53:32,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 465 flow [2023-11-06 22:53:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-11-06 22:53:32,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383561643835616 [2023-11-06 22:53:32,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-11-06 22:53:32,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-11-06 22:53:32,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:32,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-11-06 22:53:32,721 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 22:53:32,725 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 22:53:32,726 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 22:53:32,726 INFO L175 Difference]: Start difference. First operand has 114 places, 119 transitions, 285 flow. Second operand 3 states and 672 transitions. [2023-11-06 22:53:32,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 465 flow [2023-11-06 22:53:32,783 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 22:53:32,786 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 267 flow [2023-11-06 22:53:32,786 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 22:53:32,787 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -28 predicate places. [2023-11-06 22:53:32,788 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 267 flow [2023-11-06 22:53:32,788 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 22:53:32,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:32,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:53:32,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:53:32,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:53:32,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:32,790 INFO L85 PathProgramCache]: Analyzing trace with hash 51570529, now seen corresponding path program 1 times [2023-11-06 22:53:32,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:32,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435003408] [2023-11-06 22:53:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:32,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:32,911 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 22:53:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:32,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435003408] [2023-11-06 22:53:32,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435003408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:32,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:32,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:32,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103796983] [2023-11-06 22:53:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:32,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:32,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:33,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 511 [2023-11-06 22:53:33,027 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 22:53:33,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:33,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 511 [2023-11-06 22:53:33,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:35,670 INFO L124 PetriNetUnfolderBase]: 15772/26960 cut-off events. [2023-11-06 22:53:35,671 INFO L125 PetriNetUnfolderBase]: For 4440/4440 co-relation queries the response was YES. [2023-11-06 22:53:35,714 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 22:53:35,838 INFO L140 encePairwiseOnDemand]: 502/511 looper letters, 163 selfloop transitions, 5 changer transitions 0/189 dead transitions. [2023-11-06 22:53:35,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 766 flow [2023-11-06 22:53:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-11-06 22:53:35,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690150032615786 [2023-11-06 22:53:35,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-11-06 22:53:35,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-11-06 22:53:35,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:35,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-11-06 22:53:35,845 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 22:53:35,849 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 22:53:35,850 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 22:53:35,850 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 267 flow. Second operand 3 states and 719 transitions. [2023-11-06 22:53:35,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 766 flow [2023-11-06 22:53:35,853 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 22:53:35,856 INFO L231 Difference]: Finished difference. Result has 112 places, 119 transitions, 313 flow [2023-11-06 22:53:35,857 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 22:53:35,858 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -26 predicate places. [2023-11-06 22:53:35,858 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 119 transitions, 313 flow [2023-11-06 22:53:35,859 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 22:53:35,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:35,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:53:35,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:53:35,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:53:35,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1980283410, now seen corresponding path program 1 times [2023-11-06 22:53:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:35,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91144196] [2023-11-06 22:53:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:35,982 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 22:53:35,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:35,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91144196] [2023-11-06 22:53:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91144196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:35,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666837375] [2023-11-06 22:53:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:35,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:35,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:36,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 511 [2023-11-06 22:53:36,068 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 22:53:36,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:36,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 511 [2023-11-06 22:53:36,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:39,018 INFO L124 PetriNetUnfolderBase]: 12993/22191 cut-off events. [2023-11-06 22:53:39,018 INFO L125 PetriNetUnfolderBase]: For 4987/4987 co-relation queries the response was YES. [2023-11-06 22:53:39,045 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 22:53:39,121 INFO L140 encePairwiseOnDemand]: 502/511 looper letters, 89 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2023-11-06 22:53:39,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 477 flow [2023-11-06 22:53:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-11-06 22:53:39,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279191128506197 [2023-11-06 22:53:39,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-11-06 22:53:39,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-11-06 22:53:39,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:39,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-11-06 22:53:39,127 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 22:53:39,130 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 22:53:39,131 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 22:53:39,131 INFO L175 Difference]: Start difference. First operand has 112 places, 119 transitions, 313 flow. Second operand 3 states and 656 transitions. [2023-11-06 22:53:39,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 477 flow [2023-11-06 22:53:39,135 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 22:53:39,136 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 294 flow [2023-11-06 22:53:39,137 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 22:53:39,137 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -33 predicate places. [2023-11-06 22:53:39,138 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 294 flow [2023-11-06 22:53:39,138 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 22:53:39,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:39,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:53:39,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:53:39,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:53:39,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1980283411, now seen corresponding path program 1 times [2023-11-06 22:53:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:39,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593439849] [2023-11-06 22:53:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:39,224 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 22:53:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593439849] [2023-11-06 22:53:39,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593439849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:39,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:39,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301446510] [2023-11-06 22:53:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:39,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:39,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 511 [2023-11-06 22:53:39,326 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 22:53:39,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:39,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 511 [2023-11-06 22:53:39,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:41,477 INFO L124 PetriNetUnfolderBase]: 12431/21255 cut-off events. [2023-11-06 22:53:41,478 INFO L125 PetriNetUnfolderBase]: For 4608/4608 co-relation queries the response was YES. [2023-11-06 22:53:41,510 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 22:53:41,582 INFO L140 encePairwiseOnDemand]: 500/511 looper letters, 143 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2023-11-06 22:53:41,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 713 flow [2023-11-06 22:53:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:53:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-11-06 22:53:41,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441617742987606 [2023-11-06 22:53:41,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-11-06 22:53:41,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-11-06 22:53:41,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:41,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-11-06 22:53:41,592 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 22:53:41,595 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 22:53:41,595 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 22:53:41,596 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 294 flow. Second operand 3 states and 677 transitions. [2023-11-06 22:53:41,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 713 flow [2023-11-06 22:53:41,598 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 22:53:41,605 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 320 flow [2023-11-06 22:53:41,606 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 22:53:41,608 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -31 predicate places. [2023-11-06 22:53:41,608 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 320 flow [2023-11-06 22:53:41,608 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 22:53:41,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:41,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:41,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:53:41,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:53:41,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1851794032, now seen corresponding path program 1 times [2023-11-06 22:53:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:41,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034055952] [2023-11-06 22:53:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:41,662 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 22:53:41,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:41,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034055952] [2023-11-06 22:53:41,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034055952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:41,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:41,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:53:41,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299548075] [2023-11-06 22:53:41,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:41,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:53:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:41,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:53:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:53:41,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 511 [2023-11-06 22:53:41,681 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 22:53:41,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:41,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 511 [2023-11-06 22:53:41,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:44,248 INFO L124 PetriNetUnfolderBase]: 13712/23142 cut-off events. [2023-11-06 22:53:44,248 INFO L125 PetriNetUnfolderBase]: For 6117/6117 co-relation queries the response was YES. [2023-11-06 22:53:44,280 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 22:53:44,354 INFO L140 encePairwiseOnDemand]: 500/511 looper letters, 141 selfloop transitions, 9 changer transitions 0/168 dead transitions. [2023-11-06 22:53:44,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 788 flow [2023-11-06 22:53:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:53:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:53:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1081 transitions. [2023-11-06 22:53:44,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42309197651663405 [2023-11-06 22:53:44,359 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1081 transitions. [2023-11-06 22:53:44,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1081 transitions. [2023-11-06 22:53:44,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:44,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1081 transitions. [2023-11-06 22:53:44,363 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 22:53:44,369 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 22:53:44,370 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 22:53:44,371 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 320 flow. Second operand 5 states and 1081 transitions. [2023-11-06 22:53:44,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 788 flow [2023-11-06 22:53:44,377 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 22:53:44,380 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 390 flow [2023-11-06 22:53:44,380 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 22:53:44,381 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -25 predicate places. [2023-11-06 22:53:44,381 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 390 flow [2023-11-06 22:53:44,382 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 22:53:44,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:44,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:53:44,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:53:44,382 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 22:53:44,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash 227094421, now seen corresponding path program 1 times [2023-11-06 22:53:44,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:44,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605846800] [2023-11-06 22:53:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:53:44,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:53:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:53:44,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:53:44,423 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:53:44,423 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (120 of 121 remaining) [2023-11-06 22:53:44,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 121 remaining) [2023-11-06 22:53:44,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 121 remaining) [2023-11-06 22:53:44,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 121 remaining) [2023-11-06 22:53:44,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 121 remaining) [2023-11-06 22:53:44,424 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 121 remaining) [2023-11-06 22:53:44,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 121 remaining) [2023-11-06 22:53:44,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 121 remaining) [2023-11-06 22:53:44,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 121 remaining) [2023-11-06 22:53:44,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 121 remaining) [2023-11-06 22:53:44,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 121 remaining) [2023-11-06 22:53:44,425 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 121 remaining) [2023-11-06 22:53:44,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 121 remaining) [2023-11-06 22:53:44,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 121 remaining) [2023-11-06 22:53:44,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 121 remaining) [2023-11-06 22:53:44,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 121 remaining) [2023-11-06 22:53:44,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 121 remaining) [2023-11-06 22:53:44,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 121 remaining) [2023-11-06 22:53:44,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 121 remaining) [2023-11-06 22:53:44,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 121 remaining) [2023-11-06 22:53:44,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 121 remaining) [2023-11-06 22:53:44,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 121 remaining) [2023-11-06 22:53:44,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 121 remaining) [2023-11-06 22:53:44,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (97 of 121 remaining) [2023-11-06 22:53:44,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 121 remaining) [2023-11-06 22:53:44,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 121 remaining) [2023-11-06 22:53:44,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (94 of 121 remaining) [2023-11-06 22:53:44,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 121 remaining) [2023-11-06 22:53:44,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 121 remaining) [2023-11-06 22:53:44,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 121 remaining) [2023-11-06 22:53:44,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 121 remaining) [2023-11-06 22:53:44,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 121 remaining) [2023-11-06 22:53:44,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 121 remaining) [2023-11-06 22:53:44,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 121 remaining) [2023-11-06 22:53:44,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 121 remaining) [2023-11-06 22:53:44,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 121 remaining) [2023-11-06 22:53:44,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 121 remaining) [2023-11-06 22:53:44,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (83 of 121 remaining) [2023-11-06 22:53:44,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 121 remaining) [2023-11-06 22:53:44,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 121 remaining) [2023-11-06 22:53:44,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 121 remaining) [2023-11-06 22:53:44,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 121 remaining) [2023-11-06 22:53:44,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (78 of 121 remaining) [2023-11-06 22:53:44,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 121 remaining) [2023-11-06 22:53:44,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 121 remaining) [2023-11-06 22:53:44,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 121 remaining) [2023-11-06 22:53:44,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 121 remaining) [2023-11-06 22:53:44,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 121 remaining) [2023-11-06 22:53:44,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 121 remaining) [2023-11-06 22:53:44,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 121 remaining) [2023-11-06 22:53:44,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 121 remaining) [2023-11-06 22:53:44,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 121 remaining) [2023-11-06 22:53:44,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 121 remaining) [2023-11-06 22:53:44,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 121 remaining) [2023-11-06 22:53:44,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 121 remaining) [2023-11-06 22:53:44,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 121 remaining) [2023-11-06 22:53:44,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 121 remaining) [2023-11-06 22:53:44,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 121 remaining) [2023-11-06 22:53:44,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 121 remaining) [2023-11-06 22:53:44,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 121 remaining) [2023-11-06 22:53:44,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 121 remaining) [2023-11-06 22:53:44,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 121 remaining) [2023-11-06 22:53:44,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 121 remaining) [2023-11-06 22:53:44,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 121 remaining) [2023-11-06 22:53:44,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 121 remaining) [2023-11-06 22:53:44,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 121 remaining) [2023-11-06 22:53:44,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 121 remaining) [2023-11-06 22:53:44,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 121 remaining) [2023-11-06 22:53:44,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 121 remaining) [2023-11-06 22:53:44,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 121 remaining) [2023-11-06 22:53:44,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 121 remaining) [2023-11-06 22:53:44,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 121 remaining) [2023-11-06 22:53:44,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 121 remaining) [2023-11-06 22:53:44,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 121 remaining) [2023-11-06 22:53:44,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 121 remaining) [2023-11-06 22:53:44,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 121 remaining) [2023-11-06 22:53:44,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 121 remaining) [2023-11-06 22:53:44,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 121 remaining) [2023-11-06 22:53:44,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 121 remaining) [2023-11-06 22:53:44,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (41 of 121 remaining) [2023-11-06 22:53:44,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 121 remaining) [2023-11-06 22:53:44,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 121 remaining) [2023-11-06 22:53:44,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 121 remaining) [2023-11-06 22:53:44,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 121 remaining) [2023-11-06 22:53:44,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 121 remaining) [2023-11-06 22:53:44,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 121 remaining) [2023-11-06 22:53:44,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 121 remaining) [2023-11-06 22:53:44,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 121 remaining) [2023-11-06 22:53:44,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 121 remaining) [2023-11-06 22:53:44,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 121 remaining) [2023-11-06 22:53:44,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 121 remaining) [2023-11-06 22:53:44,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 121 remaining) [2023-11-06 22:53:44,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 121 remaining) [2023-11-06 22:53:44,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 121 remaining) [2023-11-06 22:53:44,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 121 remaining) [2023-11-06 22:53:44,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 121 remaining) [2023-11-06 22:53:44,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 121 remaining) [2023-11-06 22:53:44,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 121 remaining) [2023-11-06 22:53:44,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 121 remaining) [2023-11-06 22:53:44,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 121 remaining) [2023-11-06 22:53:44,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 121 remaining) [2023-11-06 22:53:44,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 121 remaining) [2023-11-06 22:53:44,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 121 remaining) [2023-11-06 22:53:44,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 121 remaining) [2023-11-06 22:53:44,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 121 remaining) [2023-11-06 22:53:44,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 121 remaining) [2023-11-06 22:53:44,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 121 remaining) [2023-11-06 22:53:44,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 121 remaining) [2023-11-06 22:53:44,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 121 remaining) [2023-11-06 22:53:44,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 121 remaining) [2023-11-06 22:53:44,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 121 remaining) [2023-11-06 22:53:44,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 121 remaining) [2023-11-06 22:53:44,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 121 remaining) [2023-11-06 22:53:44,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 121 remaining) [2023-11-06 22:53:44,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 121 remaining) [2023-11-06 22:53:44,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 121 remaining) [2023-11-06 22:53:44,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 121 remaining) [2023-11-06 22:53:44,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 121 remaining) [2023-11-06 22:53:44,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 121 remaining) [2023-11-06 22:53:44,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 121 remaining) [2023-11-06 22:53:44,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 121 remaining) [2023-11-06 22:53:44,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:53:44,448 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:44,449 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:53:44,449 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:53:44,562 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:53:44,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:53:44,713 INFO L124 PetriNetUnfolderBase]: 31/459 cut-off events. [2023-11-06 22:53:44,713 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:53:44,720 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 22:53:44,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:53:44,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 407 transitions, 832 flow [2023-11-06 22:53:44,730 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:53:44,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 407 transitions, 832 flow [2023-11-06 22:53:44,731 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 407 transitions, 832 flow [2023-11-06 22:53:44,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:53:44,862 INFO L124 PetriNetUnfolderBase]: 31/459 cut-off events. [2023-11-06 22:53:44,862 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:53:44,869 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 22:53:44,907 INFO L119 LiptonReduction]: Number of co-enabled transitions 102366 [2023-11-06 22:53:55,973 INFO L134 LiptonReduction]: Checked pairs total: 356201 [2023-11-06 22:53:55,973 INFO L136 LiptonReduction]: Total number of compositions: 347 [2023-11-06 22:53:55,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:53:55,975 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;@12be3bee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:53:55,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 160 error locations. [2023-11-06 22:53:55,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:53:55,977 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:53:55,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:53:55,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:55,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:53:55,978 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 22:53:55,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash 81645, now seen corresponding path program 1 times [2023-11-06 22:53:55,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:55,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344739060] [2023-11-06 22:53:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:55,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:56,001 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 22:53:56,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:56,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344739060] [2023-11-06 22:53:56,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344739060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:56,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:56,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:53:56,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736762701] [2023-11-06 22:53:56,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:56,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:56,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:56,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 754 [2023-11-06 22:53:56,081 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 22:53:56,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:56,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 754 [2023-11-06 22:53:56,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand