./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/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_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/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_0d50d211-b6ee-4885-8b45-7bd48de236e0/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 cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:23:49,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:23:49,306 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:23:49,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:23:49,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:23:49,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:23:49,366 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:23:49,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:23:49,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:23:49,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:23:49,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:23:49,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:23:49,375 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:23:49,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:23:49,378 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:23:49,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:23:49,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:23:49,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:23:49,380 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:23:49,380 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:23:49,381 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:23:49,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:23:49,382 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:23:49,382 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:23:49,383 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:23:49,383 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:23:49,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:23:49,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:23:49,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:23:49,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:23:49,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:23:49,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:23:49,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:23:49,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:23:49,388 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:23:49,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:23:49,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:23:49,389 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:23:49,389 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_0d50d211-b6ee-4885-8b45-7bd48de236e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d [2023-11-06 22:23:49,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:23:49,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:23:49,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:23:49,758 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:23:49,759 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:23:49,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2023-11-06 22:23:52,964 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:23:53,327 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:23:53,327 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/sv-benchmarks/c/pthread-ext/26_stack_cas_longer-2.i [2023-11-06 22:23:53,350 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/data/22f51a45d/5f6114721cad4f699c2b7033a3241d1c/FLAGfcf22ad28 [2023-11-06 22:23:53,369 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/data/22f51a45d/5f6114721cad4f699c2b7033a3241d1c [2023-11-06 22:23:53,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:23:53,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:23:53,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:23:53,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:23:53,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:23:53,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:23:53" (1/1) ... [2023-11-06 22:23:53,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4793d78d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:53, skipping insertion in model container [2023-11-06 22:23:53,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:23:53" (1/1) ... [2023-11-06 22:23:53,466 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:23:53,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:23:53,927 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:23:53,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:23:54,042 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:23:54,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54 WrapperNode [2023-11-06 22:23:54,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:23:54,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:23:54,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:23:54,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:23:54,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,077 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,109 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 192 [2023-11-06 22:23:54,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:23:54,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:23:54,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:23:54,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:23:54,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,127 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,145 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,155 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,162 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:23:54,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:23:54,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:23:54,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:23:54,170 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (1/1) ... [2023-11-06 22:23:54,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:23:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:54,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:23:54,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d50d211-b6ee-4885-8b45-7bd48de236e0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:23:54,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:23:54,258 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:23:54,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:23:54,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:23:54,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:23:54,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:23:54,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:23:54,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:23:54,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:23:54,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:23:54,288 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 22:23:54,473 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:23:54,475 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:23:54,990 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:23:55,361 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:23:55,362 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:23:55,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:23:55 BoogieIcfgContainer [2023-11-06 22:23:55,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:23:55,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:23:55,376 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:23:55,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:23:55,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:23:53" (1/3) ... [2023-11-06 22:23:55,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2339d97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:23:55, skipping insertion in model container [2023-11-06 22:23:55,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:23:54" (2/3) ... [2023-11-06 22:23:55,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2339d97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:23:55, skipping insertion in model container [2023-11-06 22:23:55,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:23:55" (3/3) ... [2023-11-06 22:23:55,384 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2023-11-06 22:23:55,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:23:55,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-06 22:23:55,409 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:23:55,543 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:23:55,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:23:55,692 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-06 22:23:55,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:23:55,703 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 22:23:55,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:23:55,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 163 transitions, 330 flow [2023-11-06 22:23:55,720 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:23:55,742 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 22:23:55,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 22:23:55,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 22:23:55,815 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-06 22:23:55,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:23:55,821 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 22:23:55,826 INFO L119 LiptonReduction]: Number of co-enabled transitions 4598 [2023-11-06 22:24:03,388 INFO L134 LiptonReduction]: Checked pairs total: 9118 [2023-11-06 22:24:03,389 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-11-06 22:24:03,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:24:03,424 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;@377c5020, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:24:03,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-06 22:24:03,435 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:24:03,436 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:24:03,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:24:03,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:03,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:24:03,438 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 22:24:03,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:03,447 INFO L85 PathProgramCache]: Analyzing trace with hash 33368, now seen corresponding path program 1 times [2023-11-06 22:24:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:03,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839648814] [2023-11-06 22:24:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:03,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:03,839 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 22:24:03,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:03,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839648814] [2023-11-06 22:24:03,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839648814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:03,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:03,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:03,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717674756] [2023-11-06 22:24:03,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:03,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:03,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 335 [2023-11-06 22:24:03,994 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 22:24:03,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:03,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 335 [2023-11-06 22:24:03,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:04,341 INFO L124 PetriNetUnfolderBase]: 236/526 cut-off events. [2023-11-06 22:24:04,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:24:04,342 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 22:24:04,348 INFO L140 encePairwiseOnDemand]: 311/335 looper letters, 75 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-11-06 22:24:04,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 326 flow [2023-11-06 22:24:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-11-06 22:24:04,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43582089552238806 [2023-11-06 22:24:04,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-11-06 22:24:04,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-11-06 22:24:04,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:04,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-11-06 22:24:04,382 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 22:24:04,390 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 22:24:04,391 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 22:24:04,394 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 146 flow. Second operand 3 states and 438 transitions. [2023-11-06 22:24:04,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 326 flow [2023-11-06 22:24:04,399 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 22:24:04,402 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 132 flow [2023-11-06 22:24:04,405 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 22:24:04,409 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-11-06 22:24:04,410 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 132 flow [2023-11-06 22:24:04,411 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 22:24:04,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:04,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:24:04,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:24:04,412 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 22:24:04,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash 33366, now seen corresponding path program 1 times [2023-11-06 22:24:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:04,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613423775] [2023-11-06 22:24:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:04,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:04,551 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 22:24:04,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:04,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613423775] [2023-11-06 22:24:04,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613423775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:04,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:04,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:04,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784913133] [2023-11-06 22:24:04,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:04,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:04,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 335 [2023-11-06 22:24:04,607 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 22:24:04,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:04,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 335 [2023-11-06 22:24:04,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:04,789 INFO L124 PetriNetUnfolderBase]: 170/398 cut-off events. [2023-11-06 22:24:04,789 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-06 22:24:04,790 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 22:24:04,794 INFO L140 encePairwiseOnDemand]: 333/335 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-11-06 22:24:04,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 226 flow [2023-11-06 22:24:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-06 22:24:04,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38308457711442784 [2023-11-06 22:24:04,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-06 22:24:04,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-06 22:24:04,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:04,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-06 22:24:04,801 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 22:24:04,806 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 22:24:04,807 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 22:24:04,807 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 132 flow. Second operand 3 states and 385 transitions. [2023-11-06 22:24:04,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 226 flow [2023-11-06 22:24:04,811 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 22:24:04,813 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 124 flow [2023-11-06 22:24:04,813 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 22:24:04,814 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-11-06 22:24:04,814 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 124 flow [2023-11-06 22:24:04,815 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 22:24:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:04,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:24:04,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:24:04,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:24:04,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash 32092666, now seen corresponding path program 1 times [2023-11-06 22:24:04,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:04,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626559809] [2023-11-06 22:24:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:05,030 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 22:24:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626559809] [2023-11-06 22:24:05,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626559809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:05,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:05,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101141017] [2023-11-06 22:24:05,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:05,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:05,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 335 [2023-11-06 22:24:05,136 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 22:24:05,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:05,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 335 [2023-11-06 22:24:05,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:05,385 INFO L124 PetriNetUnfolderBase]: 169/415 cut-off events. [2023-11-06 22:24:05,386 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-06 22:24:05,386 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 22:24:05,390 INFO L140 encePairwiseOnDemand]: 330/335 looper letters, 70 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-11-06 22:24:05,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 324 flow [2023-11-06 22:24:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-06 22:24:05,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920398009950249 [2023-11-06 22:24:05,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-06 22:24:05,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-06 22:24:05,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:05,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-06 22:24:05,396 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 22:24:05,399 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 22:24:05,400 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 22:24:05,400 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 124 flow. Second operand 3 states and 394 transitions. [2023-11-06 22:24:05,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 324 flow [2023-11-06 22:24:05,402 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 22:24:05,405 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 140 flow [2023-11-06 22:24:05,405 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 22:24:05,407 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-11-06 22:24:05,407 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 140 flow [2023-11-06 22:24:05,408 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 22:24:05,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:05,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:24:05,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:24:05,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:24:05,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash 32092667, now seen corresponding path program 1 times [2023-11-06 22:24:05,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:05,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262302613] [2023-11-06 22:24:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:05,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:05,570 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 22:24:05,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:05,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262302613] [2023-11-06 22:24:05,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262302613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:05,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:05,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:05,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142657974] [2023-11-06 22:24:05,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:05,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:05,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:05,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 335 [2023-11-06 22:24:05,650 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 22:24:05,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:05,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 335 [2023-11-06 22:24:05,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:05,810 INFO L124 PetriNetUnfolderBase]: 165/419 cut-off events. [2023-11-06 22:24:05,810 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-06 22:24:05,811 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 22:24:05,813 INFO L140 encePairwiseOnDemand]: 332/335 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-06 22:24:05,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 228 flow [2023-11-06 22:24:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-06 22:24:05,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38308457711442784 [2023-11-06 22:24:05,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-06 22:24:05,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-06 22:24:05,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:05,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-06 22:24:05,818 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 22:24:05,821 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 22:24:05,822 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 22:24:05,822 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 140 flow. Second operand 3 states and 385 transitions. [2023-11-06 22:24:05,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 228 flow [2023-11-06 22:24:05,824 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 22:24:05,825 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 135 flow [2023-11-06 22:24:05,825 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 22:24:05,826 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-11-06 22:24:05,826 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 135 flow [2023-11-06 22:24:05,827 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 22:24:05,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:05,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:24:05,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:24:05,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:24:05,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 32092813, now seen corresponding path program 1 times [2023-11-06 22:24:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:05,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869116163] [2023-11-06 22:24:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:05,959 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 22:24:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869116163] [2023-11-06 22:24:05,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869116163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:05,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:05,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:05,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555975393] [2023-11-06 22:24:05,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:05,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:05,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:06,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 335 [2023-11-06 22:24:06,042 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 22:24:06,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:06,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 335 [2023-11-06 22:24:06,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:06,175 INFO L124 PetriNetUnfolderBase]: 155/390 cut-off events. [2023-11-06 22:24:06,175 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-06 22:24:06,177 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 22:24:06,180 INFO L140 encePairwiseOnDemand]: 331/335 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-06 22:24:06,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 215 flow [2023-11-06 22:24:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-11-06 22:24:06,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37512437810945276 [2023-11-06 22:24:06,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-11-06 22:24:06,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-11-06 22:24:06,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:06,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-11-06 22:24:06,192 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 22:24:06,194 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 22:24:06,195 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 22:24:06,195 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 135 flow. Second operand 3 states and 377 transitions. [2023-11-06 22:24:06,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 215 flow [2023-11-06 22:24:06,197 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 22:24:06,200 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 130 flow [2023-11-06 22:24:06,200 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 22:24:06,203 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-11-06 22:24:06,204 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 130 flow [2023-11-06 22:24:06,204 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 22:24:06,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:06,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:24:06,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:24:06,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 22:24:06,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash 994877004, now seen corresponding path program 1 times [2023-11-06 22:24:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:06,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38534424] [2023-11-06 22:24:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:06,337 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 22:24:06,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38534424] [2023-11-06 22:24:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38534424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:06,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332005169] [2023-11-06 22:24:06,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:06,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:06,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:06,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 335 [2023-11-06 22:24:06,414 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 22:24:06,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:06,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 335 [2023-11-06 22:24:06,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:06,611 INFO L124 PetriNetUnfolderBase]: 151/365 cut-off events. [2023-11-06 22:24:06,612 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-06 22:24:06,612 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 22:24:06,616 INFO L140 encePairwiseOnDemand]: 329/335 looper letters, 62 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-06 22:24:06,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 302 flow [2023-11-06 22:24:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-11-06 22:24:06,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761194029850746 [2023-11-06 22:24:06,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-11-06 22:24:06,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-11-06 22:24:06,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:06,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-11-06 22:24:06,622 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 22:24:06,627 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 22:24:06,628 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 22:24:06,628 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 130 flow. Second operand 3 states and 378 transitions. [2023-11-06 22:24:06,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 302 flow [2023-11-06 22:24:06,631 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 22:24:06,642 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 140 flow [2023-11-06 22:24:06,643 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 22:24:06,649 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2023-11-06 22:24:06,649 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 140 flow [2023-11-06 22:24:06,651 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 22:24:06,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:06,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:24:06,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:24:06,652 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 22:24:06,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash 776376315, now seen corresponding path program 1 times [2023-11-06 22:24:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:06,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467141271] [2023-11-06 22:24:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:24:06,676 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:24:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:24:06,710 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:24:06,711 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:24:06,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-06 22:24:06,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-06 22:24:06,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-06 22:24:06,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-06 22:24:06,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-06 22:24:06,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-06 22:24:06,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-06 22:24:06,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-06 22:24:06,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-06 22:24:06,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-06 22:24:06,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-06 22:24:06,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-06 22:24:06,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-06 22:24:06,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-06 22:24:06,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-06 22:24:06,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-06 22:24:06,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-06 22:24:06,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-06 22:24:06,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-06 22:24:06,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-06 22:24:06,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-06 22:24:06,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-06 22:24:06,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-06 22:24:06,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2023-11-06 22:24:06,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-06 22:24:06,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2023-11-06 22:24:06,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (55 of 82 remaining) [2023-11-06 22:24:06,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-06 22:24:06,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-06 22:24:06,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2023-11-06 22:24:06,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2023-11-06 22:24:06,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2023-11-06 22:24:06,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-06 22:24:06,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-06 22:24:06,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-06 22:24:06,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-06 22:24:06,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-06 22:24:06,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (44 of 82 remaining) [2023-11-06 22:24:06,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-06 22:24:06,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-06 22:24:06,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-06 22:24:06,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-06 22:24:06,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (39 of 82 remaining) [2023-11-06 22:24:06,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-06 22:24:06,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-06 22:24:06,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-06 22:24:06,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-06 22:24:06,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-06 22:24:06,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-06 22:24:06,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-06 22:24:06,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-06 22:24:06,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-06 22:24:06,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-06 22:24:06,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-06 22:24:06,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-06 22:24:06,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-06 22:24:06,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-06 22:24:06,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-06 22:24:06,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-06 22:24:06,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-06 22:24:06,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-06 22:24:06,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-06 22:24:06,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-06 22:24:06,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-06 22:24:06,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-06 22:24:06,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2023-11-06 22:24:06,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-06 22:24:06,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-06 22:24:06,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 82 remaining) [2023-11-06 22:24:06,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-06 22:24:06,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-06 22:24:06,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2023-11-06 22:24:06,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2023-11-06 22:24:06,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-06 22:24:06,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-06 22:24:06,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-06 22:24:06,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-06 22:24:06,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-06 22:24:06,740 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-06 22:24:06,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 82 remaining) [2023-11-06 22:24:06,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-06 22:24:06,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2023-11-06 22:24:06,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:24:06,742 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:06,745 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:24:06,745 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:24:06,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:24:06,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:24:06,939 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-06 22:24:06,939 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:24:06,946 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 22:24:06,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:24:06,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 285 transitions, 580 flow [2023-11-06 22:24:06,958 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:24:06,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 22:24:06,959 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 22:24:06,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 22:24:07,039 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-06 22:24:07,040 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:24:07,047 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 22:24:07,078 INFO L119 LiptonReduction]: Number of co-enabled transitions 38720 [2023-11-06 22:24:15,096 INFO L134 LiptonReduction]: Checked pairs total: 112955 [2023-11-06 22:24:15,098 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-11-06 22:24:15,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:24:15,104 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;@377c5020, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:24:15,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2023-11-06 22:24:15,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:24:15,107 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:24:15,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:24:15,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:15,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:24:15,108 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 22:24:15,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash 53617, now seen corresponding path program 1 times [2023-11-06 22:24:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:15,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219956679] [2023-11-06 22:24:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:15,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:15,171 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 22:24:15,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219956679] [2023-11-06 22:24:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219956679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:15,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:15,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238559568] [2023-11-06 22:24:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:15,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:15,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 511 [2023-11-06 22:24:15,242 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 22:24:15,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:15,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 511 [2023-11-06 22:24:15,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:18,215 INFO L124 PetriNetUnfolderBase]: 9315/15431 cut-off events. [2023-11-06 22:24:18,215 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-06 22:24:18,244 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 22:24:18,495 INFO L140 encePairwiseOnDemand]: 480/511 looper letters, 92 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-11-06 22:24:18,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 424 flow [2023-11-06 22:24:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-11-06 22:24:18,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45596868884540115 [2023-11-06 22:24:18,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-11-06 22:24:18,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-11-06 22:24:18,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:18,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-11-06 22:24:18,505 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 22:24:18,509 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 22:24:18,510 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 22:24:18,511 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 304 flow. Second operand 3 states and 699 transitions. [2023-11-06 22:24:18,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 424 flow [2023-11-06 22:24:18,515 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 22:24:18,518 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 240 flow [2023-11-06 22:24:18,519 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 22:24:18,521 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -27 predicate places. [2023-11-06 22:24:18,521 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 240 flow [2023-11-06 22:24:18,525 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 22:24:18,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:18,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:24:18,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:24:18,526 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 22:24:18,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash 53618, now seen corresponding path program 1 times [2023-11-06 22:24:18,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:18,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408365430] [2023-11-06 22:24:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:18,576 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 22:24:18,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:18,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408365430] [2023-11-06 22:24:18,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408365430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:18,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:18,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:18,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851640121] [2023-11-06 22:24:18,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:18,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:18,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:18,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:18,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:18,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 511 [2023-11-06 22:24:18,666 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 22:24:18,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:18,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 511 [2023-11-06 22:24:18,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:22,907 INFO L124 PetriNetUnfolderBase]: 13947/23809 cut-off events. [2023-11-06 22:24:22,908 INFO L125 PetriNetUnfolderBase]: For 427/427 co-relation queries the response was YES. [2023-11-06 22:24:22,949 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 22:24:23,100 INFO L140 encePairwiseOnDemand]: 504/511 looper letters, 177 selfloop transitions, 6 changer transitions 0/204 dead transitions. [2023-11-06 22:24:23,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 204 transitions, 791 flow [2023-11-06 22:24:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-11-06 22:24:23,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801043705153294 [2023-11-06 22:24:23,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-11-06 22:24:23,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-11-06 22:24:23,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:23,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-11-06 22:24:23,109 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 22:24:23,113 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 22:24:23,117 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 22:24:23,117 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 240 flow. Second operand 3 states and 736 transitions. [2023-11-06 22:24:23,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 204 transitions, 791 flow [2023-11-06 22:24:23,120 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 22:24:23,126 INFO L231 Difference]: Finished difference. Result has 114 places, 119 transitions, 285 flow [2023-11-06 22:24:23,126 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 22:24:23,128 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -24 predicate places. [2023-11-06 22:24:23,128 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 119 transitions, 285 flow [2023-11-06 22:24:23,129 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 22:24:23,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:23,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:24:23,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:24:23,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:24:23,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash 51570530, now seen corresponding path program 1 times [2023-11-06 22:24:23,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:23,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247835646] [2023-11-06 22:24:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:23,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:23,317 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 22:24:23,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:23,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247835646] [2023-11-06 22:24:23,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247835646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:23,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:23,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:23,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992170933] [2023-11-06 22:24:23,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:23,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:23,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:23,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:23,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 511 [2023-11-06 22:24:23,428 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 22:24:23,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:23,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 511 [2023-11-06 22:24:23,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:26,592 INFO L124 PetriNetUnfolderBase]: 12815/21554 cut-off events. [2023-11-06 22:24:26,592 INFO L125 PetriNetUnfolderBase]: For 8094/8094 co-relation queries the response was YES. [2023-11-06 22:24:26,643 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 22:24:26,802 INFO L140 encePairwiseOnDemand]: 506/511 looper letters, 93 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-11-06 22:24:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 465 flow [2023-11-06 22:24:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-11-06 22:24:26,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383561643835616 [2023-11-06 22:24:26,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-11-06 22:24:26,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-11-06 22:24:26,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:26,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-11-06 22:24:26,812 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 22:24:26,817 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 22:24:26,818 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 22:24:26,819 INFO L175 Difference]: Start difference. First operand has 114 places, 119 transitions, 285 flow. Second operand 3 states and 672 transitions. [2023-11-06 22:24:26,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 465 flow [2023-11-06 22:24:26,881 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 22:24:26,884 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 267 flow [2023-11-06 22:24:26,885 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 22:24:26,886 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -28 predicate places. [2023-11-06 22:24:26,886 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 267 flow [2023-11-06 22:24:26,887 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 22:24:26,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:26,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:24:26,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:24:26,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:24:26,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:26,889 INFO L85 PathProgramCache]: Analyzing trace with hash 51570529, now seen corresponding path program 1 times [2023-11-06 22:24:26,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:26,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535748476] [2023-11-06 22:24:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:26,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:27,033 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 22:24:27,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:27,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535748476] [2023-11-06 22:24:27,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535748476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:27,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:27,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858363926] [2023-11-06 22:24:27,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:27,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:27,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:27,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:27,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 511 [2023-11-06 22:24:27,187 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 22:24:27,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:27,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 511 [2023-11-06 22:24:27,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:30,982 INFO L124 PetriNetUnfolderBase]: 15772/26960 cut-off events. [2023-11-06 22:24:30,982 INFO L125 PetriNetUnfolderBase]: For 4440/4440 co-relation queries the response was YES. [2023-11-06 22:24:31,031 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 22:24:31,204 INFO L140 encePairwiseOnDemand]: 502/511 looper letters, 163 selfloop transitions, 5 changer transitions 0/189 dead transitions. [2023-11-06 22:24:31,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 766 flow [2023-11-06 22:24:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-11-06 22:24:31,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690150032615786 [2023-11-06 22:24:31,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-11-06 22:24:31,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-11-06 22:24:31,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:31,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-11-06 22:24:31,215 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 22:24:31,221 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 22:24:31,222 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 22:24:31,223 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 267 flow. Second operand 3 states and 719 transitions. [2023-11-06 22:24:31,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 766 flow [2023-11-06 22:24:31,226 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 22:24:31,230 INFO L231 Difference]: Finished difference. Result has 112 places, 119 transitions, 313 flow [2023-11-06 22:24:31,232 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 22:24:31,233 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -26 predicate places. [2023-11-06 22:24:31,233 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 119 transitions, 313 flow [2023-11-06 22:24:31,234 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 22:24:31,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:31,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:24:31,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:24:31,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:24:31,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1980283410, now seen corresponding path program 1 times [2023-11-06 22:24:31,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:31,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15841363] [2023-11-06 22:24:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:31,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:31,387 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 22:24:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15841363] [2023-11-06 22:24:31,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15841363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:31,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:31,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:31,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505892703] [2023-11-06 22:24:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:31,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:31,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:31,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:31,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:31,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 511 [2023-11-06 22:24:31,488 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 22:24:31,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:31,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 511 [2023-11-06 22:24:31,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:34,673 INFO L124 PetriNetUnfolderBase]: 12993/22191 cut-off events. [2023-11-06 22:24:34,674 INFO L125 PetriNetUnfolderBase]: For 4987/4987 co-relation queries the response was YES. [2023-11-06 22:24:34,722 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 22:24:34,858 INFO L140 encePairwiseOnDemand]: 502/511 looper letters, 89 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2023-11-06 22:24:34,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 477 flow [2023-11-06 22:24:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2023-11-06 22:24:34,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279191128506197 [2023-11-06 22:24:34,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2023-11-06 22:24:34,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2023-11-06 22:24:34,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:34,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2023-11-06 22:24:34,874 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 22:24:34,882 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 22:24:34,883 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 22:24:34,883 INFO L175 Difference]: Start difference. First operand has 112 places, 119 transitions, 313 flow. Second operand 3 states and 656 transitions. [2023-11-06 22:24:34,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 477 flow [2023-11-06 22:24:34,889 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 22:24:34,892 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 294 flow [2023-11-06 22:24:34,892 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 22:24:34,894 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -33 predicate places. [2023-11-06 22:24:34,894 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 294 flow [2023-11-06 22:24:34,895 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 22:24:34,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:34,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:24:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:24:34,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:24:34,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1980283411, now seen corresponding path program 1 times [2023-11-06 22:24:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071363213] [2023-11-06 22:24:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:35,020 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 22:24:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071363213] [2023-11-06 22:24:35,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071363213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:35,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:35,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:24:35,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782149089] [2023-11-06 22:24:35,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:35,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:35,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:35,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 511 [2023-11-06 22:24:35,167 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 22:24:35,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:35,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 511 [2023-11-06 22:24:35,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:37,874 INFO L124 PetriNetUnfolderBase]: 12431/21255 cut-off events. [2023-11-06 22:24:37,874 INFO L125 PetriNetUnfolderBase]: For 4608/4608 co-relation queries the response was YES. [2023-11-06 22:24:37,918 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 22:24:37,998 INFO L140 encePairwiseOnDemand]: 500/511 looper letters, 143 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2023-11-06 22:24:37,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 713 flow [2023-11-06 22:24:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:24:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:24:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-11-06 22:24:38,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441617742987606 [2023-11-06 22:24:38,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-11-06 22:24:38,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-11-06 22:24:38,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:38,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-11-06 22:24:38,006 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 22:24:38,010 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 22:24:38,011 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 22:24:38,012 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 294 flow. Second operand 3 states and 677 transitions. [2023-11-06 22:24:38,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 713 flow [2023-11-06 22:24:38,016 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 22:24:38,019 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 320 flow [2023-11-06 22:24:38,020 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 22:24:38,020 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -31 predicate places. [2023-11-06 22:24:38,021 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 320 flow [2023-11-06 22:24:38,021 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 22:24:38,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:38,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:38,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:24:38,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 22:24:38,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1851794032, now seen corresponding path program 1 times [2023-11-06 22:24:38,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:38,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102270791] [2023-11-06 22:24:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:38,078 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 22:24:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102270791] [2023-11-06 22:24:38,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102270791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:38,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:38,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:24:38,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096680365] [2023-11-06 22:24:38,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:38,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:24:38,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:24:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:24:38,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 511 [2023-11-06 22:24:38,099 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 22:24:38,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:38,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 511 [2023-11-06 22:24:38,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:24:41,242 INFO L124 PetriNetUnfolderBase]: 13712/23142 cut-off events. [2023-11-06 22:24:41,242 INFO L125 PetriNetUnfolderBase]: For 6117/6117 co-relation queries the response was YES. [2023-11-06 22:24:41,302 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 22:24:41,415 INFO L140 encePairwiseOnDemand]: 500/511 looper letters, 141 selfloop transitions, 9 changer transitions 0/168 dead transitions. [2023-11-06 22:24:41,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 788 flow [2023-11-06 22:24:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:24:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:24:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1081 transitions. [2023-11-06 22:24:41,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42309197651663405 [2023-11-06 22:24:41,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1081 transitions. [2023-11-06 22:24:41,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1081 transitions. [2023-11-06 22:24:41,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:24:41,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1081 transitions. [2023-11-06 22:24:41,430 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 22:24:41,439 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 22:24:41,441 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 22:24:41,441 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 320 flow. Second operand 5 states and 1081 transitions. [2023-11-06 22:24:41,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 788 flow [2023-11-06 22:24:41,453 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 22:24:41,459 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 390 flow [2023-11-06 22:24:41,459 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 22:24:41,461 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -25 predicate places. [2023-11-06 22:24:41,461 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 390 flow [2023-11-06 22:24:41,462 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 22:24:41,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:41,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:24:41,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:24:41,463 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 22:24:41,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash 227094421, now seen corresponding path program 1 times [2023-11-06 22:24:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:41,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360608750] [2023-11-06 22:24:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:41,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:24:41,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:24:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:24:41,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:24:41,699 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:24:41,699 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (120 of 121 remaining) [2023-11-06 22:24:41,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 121 remaining) [2023-11-06 22:24:41,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 121 remaining) [2023-11-06 22:24:41,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 121 remaining) [2023-11-06 22:24:41,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 121 remaining) [2023-11-06 22:24:41,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 121 remaining) [2023-11-06 22:24:41,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 121 remaining) [2023-11-06 22:24:41,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 121 remaining) [2023-11-06 22:24:41,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 121 remaining) [2023-11-06 22:24:41,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 121 remaining) [2023-11-06 22:24:41,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 121 remaining) [2023-11-06 22:24:41,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 121 remaining) [2023-11-06 22:24:41,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 121 remaining) [2023-11-06 22:24:41,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 121 remaining) [2023-11-06 22:24:41,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 121 remaining) [2023-11-06 22:24:41,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 121 remaining) [2023-11-06 22:24:41,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 121 remaining) [2023-11-06 22:24:41,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 121 remaining) [2023-11-06 22:24:41,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 121 remaining) [2023-11-06 22:24:41,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 121 remaining) [2023-11-06 22:24:41,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 121 remaining) [2023-11-06 22:24:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 121 remaining) [2023-11-06 22:24:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 121 remaining) [2023-11-06 22:24:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (97 of 121 remaining) [2023-11-06 22:24:41,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 121 remaining) [2023-11-06 22:24:41,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 121 remaining) [2023-11-06 22:24:41,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (94 of 121 remaining) [2023-11-06 22:24:41,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 121 remaining) [2023-11-06 22:24:41,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 121 remaining) [2023-11-06 22:24:41,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 121 remaining) [2023-11-06 22:24:41,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 121 remaining) [2023-11-06 22:24:41,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 121 remaining) [2023-11-06 22:24:41,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 121 remaining) [2023-11-06 22:24:41,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 121 remaining) [2023-11-06 22:24:41,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 121 remaining) [2023-11-06 22:24:41,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 121 remaining) [2023-11-06 22:24:41,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 121 remaining) [2023-11-06 22:24:41,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (83 of 121 remaining) [2023-11-06 22:24:41,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 121 remaining) [2023-11-06 22:24:41,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 121 remaining) [2023-11-06 22:24:41,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 121 remaining) [2023-11-06 22:24:41,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 121 remaining) [2023-11-06 22:24:41,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (78 of 121 remaining) [2023-11-06 22:24:41,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 121 remaining) [2023-11-06 22:24:41,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 121 remaining) [2023-11-06 22:24:41,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 121 remaining) [2023-11-06 22:24:41,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 121 remaining) [2023-11-06 22:24:41,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 121 remaining) [2023-11-06 22:24:41,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 121 remaining) [2023-11-06 22:24:41,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 121 remaining) [2023-11-06 22:24:41,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 121 remaining) [2023-11-06 22:24:41,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 121 remaining) [2023-11-06 22:24:41,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 121 remaining) [2023-11-06 22:24:41,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 121 remaining) [2023-11-06 22:24:41,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 121 remaining) [2023-11-06 22:24:41,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 121 remaining) [2023-11-06 22:24:41,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 121 remaining) [2023-11-06 22:24:41,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 121 remaining) [2023-11-06 22:24:41,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 121 remaining) [2023-11-06 22:24:41,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 121 remaining) [2023-11-06 22:24:41,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 121 remaining) [2023-11-06 22:24:41,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 121 remaining) [2023-11-06 22:24:41,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 121 remaining) [2023-11-06 22:24:41,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 121 remaining) [2023-11-06 22:24:41,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 121 remaining) [2023-11-06 22:24:41,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 121 remaining) [2023-11-06 22:24:41,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 121 remaining) [2023-11-06 22:24:41,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 121 remaining) [2023-11-06 22:24:41,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 121 remaining) [2023-11-06 22:24:41,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 121 remaining) [2023-11-06 22:24:41,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 121 remaining) [2023-11-06 22:24:41,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 121 remaining) [2023-11-06 22:24:41,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 121 remaining) [2023-11-06 22:24:41,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 121 remaining) [2023-11-06 22:24:41,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 121 remaining) [2023-11-06 22:24:41,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 121 remaining) [2023-11-06 22:24:41,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 121 remaining) [2023-11-06 22:24:41,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 121 remaining) [2023-11-06 22:24:41,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 121 remaining) [2023-11-06 22:24:41,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (41 of 121 remaining) [2023-11-06 22:24:41,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 121 remaining) [2023-11-06 22:24:41,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 121 remaining) [2023-11-06 22:24:41,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 121 remaining) [2023-11-06 22:24:41,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 121 remaining) [2023-11-06 22:24:41,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 121 remaining) [2023-11-06 22:24:41,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 121 remaining) [2023-11-06 22:24:41,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 121 remaining) [2023-11-06 22:24:41,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 121 remaining) [2023-11-06 22:24:41,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 121 remaining) [2023-11-06 22:24:41,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 121 remaining) [2023-11-06 22:24:41,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 121 remaining) [2023-11-06 22:24:41,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 121 remaining) [2023-11-06 22:24:41,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 121 remaining) [2023-11-06 22:24:41,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 121 remaining) [2023-11-06 22:24:41,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 121 remaining) [2023-11-06 22:24:41,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 121 remaining) [2023-11-06 22:24:41,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 121 remaining) [2023-11-06 22:24:41,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 121 remaining) [2023-11-06 22:24:41,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 121 remaining) [2023-11-06 22:24:41,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 121 remaining) [2023-11-06 22:24:41,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 121 remaining) [2023-11-06 22:24:41,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 121 remaining) [2023-11-06 22:24:41,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 121 remaining) [2023-11-06 22:24:41,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 121 remaining) [2023-11-06 22:24:41,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 121 remaining) [2023-11-06 22:24:41,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 121 remaining) [2023-11-06 22:24:41,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 121 remaining) [2023-11-06 22:24:41,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 121 remaining) [2023-11-06 22:24:41,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 121 remaining) [2023-11-06 22:24:41,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 121 remaining) [2023-11-06 22:24:41,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 121 remaining) [2023-11-06 22:24:41,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 121 remaining) [2023-11-06 22:24:41,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 121 remaining) [2023-11-06 22:24:41,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 121 remaining) [2023-11-06 22:24:41,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 121 remaining) [2023-11-06 22:24:41,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 121 remaining) [2023-11-06 22:24:41,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 121 remaining) [2023-11-06 22:24:41,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 121 remaining) [2023-11-06 22:24:41,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 121 remaining) [2023-11-06 22:24:41,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 121 remaining) [2023-11-06 22:24:41,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 121 remaining) [2023-11-06 22:24:41,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:24:41,729 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:24:41,730 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:24:41,731 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:24:41,858 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:24:41,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:24:42,004 INFO L124 PetriNetUnfolderBase]: 31/459 cut-off events. [2023-11-06 22:24:42,004 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:24:42,016 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 22:24:42,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:24:42,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 407 transitions, 832 flow [2023-11-06 22:24:42,035 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:24:42,035 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 407 transitions, 832 flow [2023-11-06 22:24:42,035 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 407 transitions, 832 flow [2023-11-06 22:24:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 407 transitions, 832 flow [2023-11-06 22:24:42,156 INFO L124 PetriNetUnfolderBase]: 31/459 cut-off events. [2023-11-06 22:24:42,157 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:24:42,167 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 22:24:42,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 102366 [2023-11-06 22:24:54,137 INFO L134 LiptonReduction]: Checked pairs total: 356201 [2023-11-06 22:24:54,137 INFO L136 LiptonReduction]: Total number of compositions: 347 [2023-11-06 22:24:54,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:24:54,140 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;@377c5020, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:24:54,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 160 error locations. [2023-11-06 22:24:54,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:24:54,142 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-06 22:24:54,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:24:54,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:24:54,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:24:54,143 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 22:24:54,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:24:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash 81645, now seen corresponding path program 1 times [2023-11-06 22:24:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:24:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903111080] [2023-11-06 22:24:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:24:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:24:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:24:54,172 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 22:24:54,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:24:54,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903111080] [2023-11-06 22:24:54,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903111080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:24:54,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:24:54,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:24:54,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369821771] [2023-11-06 22:24:54,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:24:54,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:24:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:54,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:24:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:24:54,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 754 [2023-11-06 22:24:54,265 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 22:24:54,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:24:54,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 754 [2023-11-06 22:24:54,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand