./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:38:57,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:38:57,863 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:38:57,870 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:38:57,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:38:57,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:38:57,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:38:57,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:38:57,898 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:38:57,899 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:38:57,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:38:57,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:38:57,900 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:38:57,901 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:38:57,901 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:38:57,902 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:38:57,902 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:38:57,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:38:57,903 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:38:57,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:38:57,904 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:38:57,904 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:38:57,904 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:38:57,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:38:57,905 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:38:57,906 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:38:57,906 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:38:57,906 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:38:57,906 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:38:57,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:38:57,920 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:38:57,921 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:38:57,921 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:38:57,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:38:57,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:38:57,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:38:57,922 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:38:57,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:38:57,923 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:38:57,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:38:57,923 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:38:57,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:38:57,924 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-11-20 17:38:58,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:38:58,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:38:58,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:38:58,274 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:38:58,275 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:38:58,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-20 17:38:59,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:38:59,937 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:38:59,938 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-20 17:38:59,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbae27f1/bec0d9d6d8ba420bb141c746d2581f09/FLAG9af1aacde [2024-11-20 17:38:59,958 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fbae27f1/bec0d9d6d8ba420bb141c746d2581f09 [2024-11-20 17:38:59,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:38:59,962 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:38:59,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:38:59,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:38:59,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:38:59,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:59" (1/1) ... [2024-11-20 17:38:59,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be02a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:59, skipping insertion in model container [2024-11-20 17:38:59,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:59" (1/1) ... [2024-11-20 17:38:59,997 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:39:00,191 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:39:00,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:39:00,208 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:39:00,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:39:00,245 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:39:00,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00 WrapperNode [2024-11-20 17:39:00,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:39:00,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:39:00,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:39:00,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:39:00,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,296 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 195 [2024-11-20 17:39:00,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:39:00,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:39:00,299 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:39:00,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:39:00,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,312 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,330 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-20 17:39:00,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,344 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:39:00,349 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:39:00,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:39:00,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:39:00,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (1/1) ... [2024-11-20 17:39:00,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:39:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:00,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:39:00,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:39:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:39:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:39:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:39:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:39:00,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:39:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:39:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:39:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:39:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:39:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:39:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:39:00,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:39:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:39:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:39:00,434 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:39:00,562 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:39:00,577 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:39:01,064 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:39:01,064 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:39:01,349 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:39:01,349 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:39:01,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:01 BoogieIcfgContainer [2024-11-20 17:39:01,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:39:01,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:39:01,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:39:01,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:39:01,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:38:59" (1/3) ... [2024-11-20 17:39:01,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4c4840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:01, skipping insertion in model container [2024-11-20 17:39:01,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:00" (2/3) ... [2024-11-20 17:39:01,360 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4c4840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:01, skipping insertion in model container [2024-11-20 17:39:01,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:01" (3/3) ... [2024-11-20 17:39:01,361 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-11-20 17:39:01,378 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:39:01,379 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-20 17:39:01,379 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:39:01,500 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:39:01,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2024-11-20 17:39:01,609 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2024-11-20 17:39:01,611 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:39:01,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 162 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-11-20 17:39:01,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2024-11-20 17:39:01,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2024-11-20 17:39:01,631 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:39:01,637 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@3003b20d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:39:01,638 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-20 17:39:01,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:39:01,641 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:39:01,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:39:01,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:01,642 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:01,643 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:01,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash 649140, now seen corresponding path program 1 times [2024-11-20 17:39:01,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:01,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292603488] [2024-11-20 17:39:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:01,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:01,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292603488] [2024-11-20 17:39:01,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292603488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:01,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:01,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:39:01,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385061243] [2024-11-20 17:39:01,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:01,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:39:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:39:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:39:02,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-20 17:39:02,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:02,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:02,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-20 17:39:02,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:02,169 INFO L124 PetriNetUnfolderBase]: 116/263 cut-off events. [2024-11-20 17:39:02,169 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-20 17:39:02,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 263 events. 116/263 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1130 event pairs, 68 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 416. Up to 183 conditions per place. [2024-11-20 17:39:02,177 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 24 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-11-20 17:39:02,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 170 flow [2024-11-20 17:39:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:39:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:39:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-11-20 17:39:02,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-20 17:39:02,196 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 119 transitions. [2024-11-20 17:39:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 170 flow [2024-11-20 17:39:02,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:02,204 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2024-11-20 17:39:02,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-11-20 17:39:02,215 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-11-20 17:39:02,216 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2024-11-20 17:39:02,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:02,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:02,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:02,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:39:02,217 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:02,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:02,219 INFO L85 PathProgramCache]: Analyzing trace with hash 649141, now seen corresponding path program 1 times [2024-11-20 17:39:02,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:02,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969584262] [2024-11-20 17:39:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:02,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:02,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:02,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969584262] [2024-11-20 17:39:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969584262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:02,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:02,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:39:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272309134] [2024-11-20 17:39:02,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:02,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:02,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-20 17:39:02,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:02,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:02,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-20 17:39:02,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:02,856 INFO L124 PetriNetUnfolderBase]: 117/266 cut-off events. [2024-11-20 17:39:02,857 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:39:02,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 266 events. 117/266 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1129 event pairs, 68 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 441. Up to 192 conditions per place. [2024-11-20 17:39:02,861 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 27 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2024-11-20 17:39:02,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 182 flow [2024-11-20 17:39:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-20 17:39:02,864 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-20 17:39:02,864 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-20 17:39:02,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 182 flow [2024-11-20 17:39:02,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:02,868 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 137 flow [2024-11-20 17:39:02,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2024-11-20 17:39:02,869 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-11-20 17:39:02,870 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 137 flow [2024-11-20 17:39:02,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:02,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:02,871 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:39:02,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:39:02,872 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:02,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 20125317, now seen corresponding path program 1 times [2024-11-20 17:39:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467519575] [2024-11-20 17:39:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:03,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:03,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467519575] [2024-11-20 17:39:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467519575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:03,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:03,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:03,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823588438] [2024-11-20 17:39:03,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:03,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:03,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:03,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-20 17:39:03,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:03,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:03,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-20 17:39:03,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:03,408 INFO L124 PetriNetUnfolderBase]: 118/269 cut-off events. [2024-11-20 17:39:03,408 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:39:03,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 269 events. 118/269 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1155 event pairs, 68 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 462. Up to 191 conditions per place. [2024-11-20 17:39:03,412 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 27 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-11-20 17:39:03,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 211 flow [2024-11-20 17:39:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-11-20 17:39:03,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-20 17:39:03,417 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 137 flow. Second operand 5 states and 185 transitions. [2024-11-20 17:39:03,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 211 flow [2024-11-20 17:39:03,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:03,420 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 171 flow [2024-11-20 17:39:03,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-11-20 17:39:03,421 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-11-20 17:39:03,421 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 171 flow [2024-11-20 17:39:03,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:03,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:03,422 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:39:03,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:39:03,423 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:03,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash 623845148, now seen corresponding path program 1 times [2024-11-20 17:39:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397543335] [2024-11-20 17:39:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:03,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397543335] [2024-11-20 17:39:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397543335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:03,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897977103] [2024-11-20 17:39:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:03,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:03,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:03,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:03,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:39:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:03,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:39:03,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:03,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:39:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:04,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:04,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897977103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:04,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:04,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:39:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684452628] [2024-11-20 17:39:04,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:04,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:39:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:39:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:39:04,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-20 17:39:04,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 171 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:04,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:04,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-20 17:39:04,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:04,823 INFO L124 PetriNetUnfolderBase]: 118/268 cut-off events. [2024-11-20 17:39:04,824 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-20 17:39:04,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 268 events. 118/268 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1142 event pairs, 68 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 472. Up to 191 conditions per place. [2024-11-20 17:39:04,828 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 26 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-20 17:39:04,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 233 flow [2024-11-20 17:39:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-20 17:39:04,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-11-20 17:39:04,831 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 171 flow. Second operand 6 states and 211 transitions. [2024-11-20 17:39:04,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 233 flow [2024-11-20 17:39:04,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:04,833 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 180 flow [2024-11-20 17:39:04,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-11-20 17:39:04,834 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2024-11-20 17:39:04,835 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 180 flow [2024-11-20 17:39:04,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:04,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:04,835 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-20 17:39:04,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:39:05,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:05,039 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:05,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2134385646, now seen corresponding path program 1 times [2024-11-20 17:39:05,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:05,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766312218] [2024-11-20 17:39:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:05,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:05,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766312218] [2024-11-20 17:39:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766312218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493013330] [2024-11-20 17:39:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:05,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:05,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:05,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:05,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:39:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:05,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:39:05,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:05,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:39:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:05,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:05,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493013330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:05,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:05,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:39:05,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554362851] [2024-11-20 17:39:05,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:05,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:39:05,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:39:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:39:06,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-11-20 17:39:06,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 180 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:06,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:06,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-11-20 17:39:06,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:06,615 INFO L124 PetriNetUnfolderBase]: 120/273 cut-off events. [2024-11-20 17:39:06,615 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-20 17:39:06,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 273 events. 120/273 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1167 event pairs, 68 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 480. Up to 184 conditions per place. [2024-11-20 17:39:06,618 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 20 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2024-11-20 17:39:06,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 285 flow [2024-11-20 17:39:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 310 transitions. [2024-11-20 17:39:06,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-20 17:39:06,623 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 180 flow. Second operand 9 states and 310 transitions. [2024-11-20 17:39:06,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 285 flow [2024-11-20 17:39:06,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 238 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 17:39:06,627 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 198 flow [2024-11-20 17:39:06,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=198, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-11-20 17:39:06,628 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-11-20 17:39:06,628 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 198 flow [2024-11-20 17:39:06,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:06,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:06,630 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:06,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:39:06,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:06,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:06,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1738298369, now seen corresponding path program 1 times [2024-11-20 17:39:06,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885042563] [2024-11-20 17:39:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:06,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:06,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885042563] [2024-11-20 17:39:06,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885042563] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:06,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941690513] [2024-11-20 17:39:06,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:06,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:06,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:06,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:06,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:06,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:06,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:06,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:07,073 INFO L124 PetriNetUnfolderBase]: 212/474 cut-off events. [2024-11-20 17:39:07,074 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:39:07,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 474 events. 212/474 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2403 event pairs, 87 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 550. Up to 229 conditions per place. [2024-11-20 17:39:07,077 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 67 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2024-11-20 17:39:07,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 455 flow [2024-11-20 17:39:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 248 transitions. [2024-11-20 17:39:07,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-20 17:39:07,079 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 198 flow. Second operand 6 states and 248 transitions. [2024-11-20 17:39:07,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 455 flow [2024-11-20 17:39:07,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 402 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:07,082 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 202 flow [2024-11-20 17:39:07,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-11-20 17:39:07,083 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2024-11-20 17:39:07,083 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 202 flow [2024-11-20 17:39:07,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:07,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:07,084 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:07,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:39:07,084 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:07,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1346316314, now seen corresponding path program 1 times [2024-11-20 17:39:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110994377] [2024-11-20 17:39:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:07,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110994377] [2024-11-20 17:39:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110994377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:07,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:07,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:39:07,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242102089] [2024-11-20 17:39:07,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:07,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:07,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:07,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:07,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:07,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:07,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:07,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:07,367 INFO L124 PetriNetUnfolderBase]: 352/830 cut-off events. [2024-11-20 17:39:07,367 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-20 17:39:07,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 830 events. 352/830 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4990 event pairs, 144 based on Foata normal form. 12/619 useless extension candidates. Maximal degree in co-relation 921. Up to 360 conditions per place. [2024-11-20 17:39:07,372 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 59 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-20 17:39:07,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 401 flow [2024-11-20 17:39:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-11-20 17:39:07,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-11-20 17:39:07,374 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 202 flow. Second operand 5 states and 211 transitions. [2024-11-20 17:39:07,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 401 flow [2024-11-20 17:39:07,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:07,377 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 237 flow [2024-11-20 17:39:07,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-11-20 17:39:07,378 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2024-11-20 17:39:07,378 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 237 flow [2024-11-20 17:39:07,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:07,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:07,379 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:07,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:39:07,379 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:07,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 230400802, now seen corresponding path program 1 times [2024-11-20 17:39:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:07,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550668205] [2024-11-20 17:39:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:07,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550668205] [2024-11-20 17:39:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550668205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520008254] [2024-11-20 17:39:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:07,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:07,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:07,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:07,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:07,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:07,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:07,632 INFO L124 PetriNetUnfolderBase]: 304/798 cut-off events. [2024-11-20 17:39:07,632 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-20 17:39:07,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 798 events. 304/798 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4895 event pairs, 164 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 995. Up to 373 conditions per place. [2024-11-20 17:39:07,637 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 63 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2024-11-20 17:39:07,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 458 flow [2024-11-20 17:39:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 241 transitions. [2024-11-20 17:39:07,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6694444444444444 [2024-11-20 17:39:07,639 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 237 flow. Second operand 6 states and 241 transitions. [2024-11-20 17:39:07,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 458 flow [2024-11-20 17:39:07,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:07,642 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 254 flow [2024-11-20 17:39:07,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2024-11-20 17:39:07,643 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2024-11-20 17:39:07,643 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 254 flow [2024-11-20 17:39:07,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:07,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:07,644 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:07,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:39:07,644 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:07,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash 249474425, now seen corresponding path program 1 times [2024-11-20 17:39:07,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:07,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364618464] [2024-11-20 17:39:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:07,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:07,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364618464] [2024-11-20 17:39:07,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364618464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:07,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:07,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817790631] [2024-11-20 17:39:07,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:07,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:07,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:07,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-20 17:39:07,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:07,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:07,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-20 17:39:07,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:07,985 INFO L124 PetriNetUnfolderBase]: 348/868 cut-off events. [2024-11-20 17:39:07,985 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2024-11-20 17:39:07,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 868 events. 348/868 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5240 event pairs, 266 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 1275. Up to 610 conditions per place. [2024-11-20 17:39:07,990 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 39 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-11-20 17:39:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 340 flow [2024-11-20 17:39:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-11-20 17:39:07,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-11-20 17:39:07,991 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 254 flow. Second operand 5 states and 148 transitions. [2024-11-20 17:39:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 340 flow [2024-11-20 17:39:07,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 65 transitions, 332 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:07,993 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 254 flow [2024-11-20 17:39:07,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2024-11-20 17:39:07,995 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-11-20 17:39:07,995 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 254 flow [2024-11-20 17:39:07,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:07,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:07,995 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:07,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:39:07,996 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:07,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash 249474426, now seen corresponding path program 1 times [2024-11-20 17:39:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:07,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416712648] [2024-11-20 17:39:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:08,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:08,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416712648] [2024-11-20 17:39:08,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416712648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:08,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597830669] [2024-11-20 17:39:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:08,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:08,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:08,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:08,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:39:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:08,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:39:08,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:08,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:08,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:39:08,395 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:08,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:08,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:08,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:39:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597830669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:08,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:08,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:39:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20523326] [2024-11-20 17:39:08,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:08,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:39:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:39:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:39:09,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:09,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:09,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:09,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:09,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:09,819 INFO L124 PetriNetUnfolderBase]: 496/1099 cut-off events. [2024-11-20 17:39:09,819 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2024-11-20 17:39:09,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 1099 events. 496/1099 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6295 event pairs, 163 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1464. Up to 317 conditions per place. [2024-11-20 17:39:09,829 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 80 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-11-20 17:39:09,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 114 transitions, 578 flow [2024-11-20 17:39:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 323 transitions. [2024-11-20 17:39:09,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5981481481481481 [2024-11-20 17:39:09,832 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 254 flow. Second operand 9 states and 323 transitions. [2024-11-20 17:39:09,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 114 transitions, 578 flow [2024-11-20 17:39:09,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 564 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:09,836 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 303 flow [2024-11-20 17:39:09,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=303, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-11-20 17:39:09,837 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-11-20 17:39:09,837 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 303 flow [2024-11-20 17:39:09,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:09,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:09,838 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:09,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:39:10,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:10,044 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:10,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:10,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1031966391, now seen corresponding path program 1 times [2024-11-20 17:39:10,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186785352] [2024-11-20 17:39:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:10,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186785352] [2024-11-20 17:39:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186785352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:10,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:39:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272156849] [2024-11-20 17:39:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:10,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:10,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:10,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:10,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:10,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:10,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:10,332 INFO L124 PetriNetUnfolderBase]: 410/1020 cut-off events. [2024-11-20 17:39:10,333 INFO L125 PetriNetUnfolderBase]: For 654/656 co-relation queries the response was YES. [2024-11-20 17:39:10,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2211 conditions, 1020 events. 410/1020 cut-off events. For 654/656 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5913 event pairs, 260 based on Foata normal form. 9/828 useless extension candidates. Maximal degree in co-relation 1395. Up to 566 conditions per place. [2024-11-20 17:39:10,339 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 58 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-20 17:39:10,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 504 flow [2024-11-20 17:39:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 204 transitions. [2024-11-20 17:39:10,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-20 17:39:10,341 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 303 flow. Second operand 5 states and 204 transitions. [2024-11-20 17:39:10,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 504 flow [2024-11-20 17:39:10,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 87 transitions, 471 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:10,344 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 313 flow [2024-11-20 17:39:10,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-11-20 17:39:10,345 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2024-11-20 17:39:10,345 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 313 flow [2024-11-20 17:39:10,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:10,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:10,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:10,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:39:10,346 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:10,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash -856226789, now seen corresponding path program 1 times [2024-11-20 17:39:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:10,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775557780] [2024-11-20 17:39:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:10,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:10,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:10,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775557780] [2024-11-20 17:39:10,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775557780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:10,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:10,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356554145] [2024-11-20 17:39:10,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:10,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:10,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:10,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-20 17:39:10,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 313 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:10,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:10,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-20 17:39:10,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:10,596 INFO L124 PetriNetUnfolderBase]: 498/1105 cut-off events. [2024-11-20 17:39:10,596 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2024-11-20 17:39:10,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2520 conditions, 1105 events. 498/1105 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6045 event pairs, 402 based on Foata normal form. 0/1053 useless extension candidates. Maximal degree in co-relation 1693. Up to 871 conditions per place. [2024-11-20 17:39:10,602 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 45 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-20 17:39:10,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 66 transitions, 409 flow [2024-11-20 17:39:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-11-20 17:39:10,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-20 17:39:10,604 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 313 flow. Second operand 4 states and 125 transitions. [2024-11-20 17:39:10,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 66 transitions, 409 flow [2024-11-20 17:39:10,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 397 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:10,607 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 307 flow [2024-11-20 17:39:10,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-20 17:39:10,610 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2024-11-20 17:39:10,610 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 307 flow [2024-11-20 17:39:10,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:10,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:10,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:10,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:39:10,611 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:10,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash -856226788, now seen corresponding path program 1 times [2024-11-20 17:39:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:10,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907158607] [2024-11-20 17:39:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:10,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:10,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:10,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907158607] [2024-11-20 17:39:10,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907158607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:10,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925972727] [2024-11-20 17:39:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:10,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:10,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:10,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:39:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:10,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:39:10,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:10,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:10,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-20 17:39:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925972727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:10,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:10,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-20 17:39:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820579670] [2024-11-20 17:39:10,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:10,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:39:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:39:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:39:11,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-20 17:39:11,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 307 flow. Second operand has 11 states, 11 states have (on average 30.727272727272727) internal successors, (338), 11 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:11,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:11,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-20 17:39:11,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:11,688 INFO L124 PetriNetUnfolderBase]: 429/895 cut-off events. [2024-11-20 17:39:11,688 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2024-11-20 17:39:11,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 895 events. 429/895 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4531 event pairs, 155 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 1422. Up to 255 conditions per place. [2024-11-20 17:39:11,694 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 76 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-11-20 17:39:11,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 107 transitions, 599 flow [2024-11-20 17:39:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 284 transitions. [2024-11-20 17:39:11,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-11-20 17:39:11,696 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 307 flow. Second operand 7 states and 284 transitions. [2024-11-20 17:39:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 107 transitions, 599 flow [2024-11-20 17:39:11,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 591 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:11,701 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 349 flow [2024-11-20 17:39:11,701 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-11-20 17:39:11,702 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2024-11-20 17:39:11,702 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 349 flow [2024-11-20 17:39:11,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.727272727272727) internal successors, (338), 11 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:11,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:11,704 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:11,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:39:11,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:11,906 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:11,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash -780390884, now seen corresponding path program 1 times [2024-11-20 17:39:11,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:11,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342978245] [2024-11-20 17:39:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:11,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:12,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342978245] [2024-11-20 17:39:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342978245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237021624] [2024-11-20 17:39:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:12,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:12,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:12,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:12,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:39:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:12,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:39:12,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:12,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:12,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:12,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:39:12,268 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:12,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:12,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:12,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:39:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:12,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237021624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:12,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:12,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:39:12,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004586981] [2024-11-20 17:39:12,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:12,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:39:12,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:39:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:39:13,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-20 17:39:13,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 349 flow. Second operand has 13 states, 13 states have (on average 29.307692307692307) internal successors, (381), 13 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:13,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:13,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-20 17:39:13,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:13,740 INFO L124 PetriNetUnfolderBase]: 714/1563 cut-off events. [2024-11-20 17:39:13,741 INFO L125 PetriNetUnfolderBase]: For 1789/1849 co-relation queries the response was YES. [2024-11-20 17:39:13,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3658 conditions, 1563 events. 714/1563 cut-off events. For 1789/1849 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9237 event pairs, 259 based on Foata normal form. 0/1372 useless extension candidates. Maximal degree in co-relation 2774. Up to 408 conditions per place. [2024-11-20 17:39:13,751 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 80 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-11-20 17:39:13,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 111 transitions, 707 flow [2024-11-20 17:39:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 326 transitions. [2024-11-20 17:39:13,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2024-11-20 17:39:13,753 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 349 flow. Second operand 9 states and 326 transitions. [2024-11-20 17:39:13,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 111 transitions, 707 flow [2024-11-20 17:39:13,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 670 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:13,758 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 370 flow [2024-11-20 17:39:13,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2024-11-20 17:39:13,759 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 27 predicate places. [2024-11-20 17:39:13,759 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 370 flow [2024-11-20 17:39:13,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.307692307692307) internal successors, (381), 13 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:13,759 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:13,759 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:13,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:39:13,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 17:39:13,964 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:13,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:13,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1577686988, now seen corresponding path program 1 times [2024-11-20 17:39:13,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:13,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949503941] [2024-11-20 17:39:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:13,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:14,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949503941] [2024-11-20 17:39:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949503941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925700544] [2024-11-20 17:39:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:14,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:14,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:14,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:39:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:14,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:39:14,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:14,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:14,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-20 17:39:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:14,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925700544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:14,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:14,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-20 17:39:14,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753154619] [2024-11-20 17:39:14,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:14,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:39:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:39:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:39:14,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:39:14,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 370 flow. Second operand has 11 states, 11 states have (on average 30.09090909090909) internal successors, (331), 11 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:14,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:14,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:39:14,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:15,143 INFO L124 PetriNetUnfolderBase]: 790/1548 cut-off events. [2024-11-20 17:39:15,143 INFO L125 PetriNetUnfolderBase]: For 1966/2044 co-relation queries the response was YES. [2024-11-20 17:39:15,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 1548 events. 790/1548 cut-off events. For 1966/2044 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8369 event pairs, 259 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 3096. Up to 471 conditions per place. [2024-11-20 17:39:15,153 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 77 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-11-20 17:39:15,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 695 flow [2024-11-20 17:39:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 275 transitions. [2024-11-20 17:39:15,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-20 17:39:15,155 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 370 flow. Second operand 7 states and 275 transitions. [2024-11-20 17:39:15,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 695 flow [2024-11-20 17:39:15,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 107 transitions, 666 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:15,159 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 391 flow [2024-11-20 17:39:15,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2024-11-20 17:39:15,162 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 28 predicate places. [2024-11-20 17:39:15,162 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 391 flow [2024-11-20 17:39:15,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.09090909090909) internal successors, (331), 11 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:15,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:15,162 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:15,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:39:15,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 17:39:15,365 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:15,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:15,365 INFO L85 PathProgramCache]: Analyzing trace with hash -40872896, now seen corresponding path program 1 times [2024-11-20 17:39:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:15,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622121255] [2024-11-20 17:39:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622121255] [2024-11-20 17:39:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622121255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:15,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660471997] [2024-11-20 17:39:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:15,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:15,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:15,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:39:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:15,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:39:15,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:15,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660471997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:15,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:15,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-20 17:39:15,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141874160] [2024-11-20 17:39:15,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:15,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:39:15,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:39:15,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:39:15,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:15,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:15,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:15,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:15,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:16,651 INFO L124 PetriNetUnfolderBase]: 1830/3790 cut-off events. [2024-11-20 17:39:16,651 INFO L125 PetriNetUnfolderBase]: For 5917/6070 co-relation queries the response was YES. [2024-11-20 17:39:16,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10074 conditions, 3790 events. 1830/3790 cut-off events. For 5917/6070 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 27109 event pairs, 481 based on Foata normal form. 72/3768 useless extension candidates. Maximal degree in co-relation 3946. Up to 911 conditions per place. [2024-11-20 17:39:16,675 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 173 selfloop transitions, 35 changer transitions 0/224 dead transitions. [2024-11-20 17:39:16,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 224 transitions, 1553 flow [2024-11-20 17:39:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 17:39:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 17:39:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 833 transitions. [2024-11-20 17:39:16,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-20 17:39:16,678 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 391 flow. Second operand 21 states and 833 transitions. [2024-11-20 17:39:16,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 224 transitions, 1553 flow [2024-11-20 17:39:16,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 224 transitions, 1479 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:16,690 INFO L231 Difference]: Finished difference. Result has 107 places, 84 transitions, 603 flow [2024-11-20 17:39:16,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=603, PETRI_PLACES=107, PETRI_TRANSITIONS=84} [2024-11-20 17:39:16,691 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 49 predicate places. [2024-11-20 17:39:16,691 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 84 transitions, 603 flow [2024-11-20 17:39:16,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:16,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:16,691 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:16,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:16,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:16,892 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:16,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1046554722, now seen corresponding path program 1 times [2024-11-20 17:39:16,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:16,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644982701] [2024-11-20 17:39:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:16,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:16,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644982701] [2024-11-20 17:39:16,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644982701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469042463] [2024-11-20 17:39:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:16,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:16,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:16,984 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:16,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:39:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:17,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:39:17,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:17,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:17,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469042463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:17,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:17,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-20 17:39:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407015170] [2024-11-20 17:39:17,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:17,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:39:17,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:39:17,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:39:17,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:17,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 84 transitions, 603 flow. Second operand has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:17,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:17,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:17,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:18,093 INFO L124 PetriNetUnfolderBase]: 1511/3115 cut-off events. [2024-11-20 17:39:18,093 INFO L125 PetriNetUnfolderBase]: For 6486/6697 co-relation queries the response was YES. [2024-11-20 17:39:18,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8529 conditions, 3115 events. 1511/3115 cut-off events. For 6486/6697 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20804 event pairs, 546 based on Foata normal form. 54/3118 useless extension candidates. Maximal degree in co-relation 8481. Up to 915 conditions per place. [2024-11-20 17:39:18,114 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 154 selfloop transitions, 37 changer transitions 0/207 dead transitions. [2024-11-20 17:39:18,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 207 transitions, 1513 flow [2024-11-20 17:39:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 17:39:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-20 17:39:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 889 transitions. [2024-11-20 17:39:18,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6442028985507247 [2024-11-20 17:39:18,116 INFO L175 Difference]: Start difference. First operand has 107 places, 84 transitions, 603 flow. Second operand 23 states and 889 transitions. [2024-11-20 17:39:18,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 207 transitions, 1513 flow [2024-11-20 17:39:18,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 207 transitions, 1510 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:18,127 INFO L231 Difference]: Finished difference. Result has 132 places, 93 transitions, 776 flow [2024-11-20 17:39:18,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=776, PETRI_PLACES=132, PETRI_TRANSITIONS=93} [2024-11-20 17:39:18,128 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2024-11-20 17:39:18,128 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 93 transitions, 776 flow [2024-11-20 17:39:18,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:18,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:18,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:18,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:39:18,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 17:39:18,329 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:18,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:18,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2057850876, now seen corresponding path program 1 times [2024-11-20 17:39:18,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:18,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021144263] [2024-11-20 17:39:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:18,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:18,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021144263] [2024-11-20 17:39:18,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021144263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:18,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:18,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:39:18,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238242232] [2024-11-20 17:39:18,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:18,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:39:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:39:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:39:18,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-20 17:39:18,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 93 transitions, 776 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:18,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:18,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-20 17:39:18,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:18,897 INFO L124 PetriNetUnfolderBase]: 1357/3009 cut-off events. [2024-11-20 17:39:18,897 INFO L125 PetriNetUnfolderBase]: For 8241/8429 co-relation queries the response was YES. [2024-11-20 17:39:18,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8672 conditions, 3009 events. 1357/3009 cut-off events. For 8241/8429 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 20896 event pairs, 606 based on Foata normal form. 1/2960 useless extension candidates. Maximal degree in co-relation 8613. Up to 2283 conditions per place. [2024-11-20 17:39:18,914 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 72 selfloop transitions, 20 changer transitions 13/122 dead transitions. [2024-11-20 17:39:18,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 122 transitions, 1201 flow [2024-11-20 17:39:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-11-20 17:39:18,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-11-20 17:39:18,915 INFO L175 Difference]: Start difference. First operand has 132 places, 93 transitions, 776 flow. Second operand 6 states and 242 transitions. [2024-11-20 17:39:18,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 122 transitions, 1201 flow [2024-11-20 17:39:18,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 122 transitions, 1145 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-11-20 17:39:18,928 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 962 flow [2024-11-20 17:39:18,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=962, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2024-11-20 17:39:18,929 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 69 predicate places. [2024-11-20 17:39:18,929 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 962 flow [2024-11-20 17:39:18,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:18,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:18,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:18,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 17:39:18,930 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:18,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1090212515, now seen corresponding path program 1 times [2024-11-20 17:39:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:18,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618181363] [2024-11-20 17:39:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:19,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618181363] [2024-11-20 17:39:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618181363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332213298] [2024-11-20 17:39:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:19,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:19,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:19,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:19,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:39:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:19,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 17:39:19,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:19,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:19,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332213298] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:19,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:19,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2024-11-20 17:39:19,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121373845] [2024-11-20 17:39:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:19,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:39:19,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:39:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:39:19,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-20 17:39:19,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 962 flow. Second operand has 8 states, 8 states have (on average 34.25) internal successors, (274), 8 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:19,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:19,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-20 17:39:19,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:19,683 INFO L124 PetriNetUnfolderBase]: 1349/2967 cut-off events. [2024-11-20 17:39:19,683 INFO L125 PetriNetUnfolderBase]: For 9204/9414 co-relation queries the response was YES. [2024-11-20 17:39:19,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8778 conditions, 2967 events. 1349/2967 cut-off events. For 9204/9414 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20593 event pairs, 953 based on Foata normal form. 2/2908 useless extension candidates. Maximal degree in co-relation 8651. Up to 1975 conditions per place. [2024-11-20 17:39:19,703 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 83 selfloop transitions, 30 changer transitions 13/143 dead transitions. [2024-11-20 17:39:19,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 143 transitions, 1314 flow [2024-11-20 17:39:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:39:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:39:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-11-20 17:39:19,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6685185185185185 [2024-11-20 17:39:19,705 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 962 flow. Second operand 9 states and 361 transitions. [2024-11-20 17:39:19,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 143 transitions, 1314 flow [2024-11-20 17:39:19,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 143 transitions, 1286 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:19,717 INFO L231 Difference]: Finished difference. Result has 131 places, 105 transitions, 965 flow [2024-11-20 17:39:19,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=965, PETRI_PLACES=131, PETRI_TRANSITIONS=105} [2024-11-20 17:39:19,717 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 73 predicate places. [2024-11-20 17:39:19,717 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 105 transitions, 965 flow [2024-11-20 17:39:19,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.25) internal successors, (274), 8 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:19,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:19,718 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:19,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:19,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:19,919 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:19,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1526114109, now seen corresponding path program 1 times [2024-11-20 17:39:19,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:19,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157331671] [2024-11-20 17:39:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:20,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157331671] [2024-11-20 17:39:20,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157331671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721590311] [2024-11-20 17:39:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:20,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:20,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:20,062 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:20,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:39:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:20,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:39:20,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:20,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721590311] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:20,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:20,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-20 17:39:20,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251815196] [2024-11-20 17:39:20,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:20,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:39:20,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:39:20,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:39:20,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-20 17:39:20,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 105 transitions, 965 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:20,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:20,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-20 17:39:20,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:20,735 INFO L124 PetriNetUnfolderBase]: 1317/2921 cut-off events. [2024-11-20 17:39:20,735 INFO L125 PetriNetUnfolderBase]: For 8759/8947 co-relation queries the response was YES. [2024-11-20 17:39:20,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 2921 events. 1317/2921 cut-off events. For 8759/8947 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20618 event pairs, 933 based on Foata normal form. 2/2859 useless extension candidates. Maximal degree in co-relation 8442. Up to 2098 conditions per place. [2024-11-20 17:39:20,749 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 71 selfloop transitions, 27 changer transitions 13/128 dead transitions. [2024-11-20 17:39:20,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 128 transitions, 1242 flow [2024-11-20 17:39:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:39:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:39:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 315 transitions. [2024-11-20 17:39:20,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-20 17:39:20,751 INFO L175 Difference]: Start difference. First operand has 131 places, 105 transitions, 965 flow. Second operand 8 states and 315 transitions. [2024-11-20 17:39:20,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 128 transitions, 1242 flow [2024-11-20 17:39:20,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 128 transitions, 1221 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:20,763 INFO L231 Difference]: Finished difference. Result has 133 places, 101 transitions, 950 flow [2024-11-20 17:39:20,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=133, PETRI_TRANSITIONS=101} [2024-11-20 17:39:20,764 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 75 predicate places. [2024-11-20 17:39:20,764 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 101 transitions, 950 flow [2024-11-20 17:39:20,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:20,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:20,765 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:20,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:39:20,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:20,965 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:20,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash -839964998, now seen corresponding path program 2 times [2024-11-20 17:39:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:20,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605726016] [2024-11-20 17:39:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:20,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:21,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:21,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605726016] [2024-11-20 17:39:21,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605726016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:21,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665043482] [2024-11-20 17:39:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:21,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:21,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:21,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:21,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:39:21,279 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:39:21,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:21,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:39:21,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:21,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:21,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:39:21,375 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:21,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-20 17:39:21,387 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:21,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:21,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:21,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665043482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:21,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:21,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-20 17:39:21,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501424553] [2024-11-20 17:39:21,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:21,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:39:21,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:39:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:39:22,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:39:22,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 101 transitions, 950 flow. Second operand has 21 states, 21 states have (on average 26.0) internal successors, (546), 21 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:22,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:22,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:39:22,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:23,680 INFO L124 PetriNetUnfolderBase]: 1996/4087 cut-off events. [2024-11-20 17:39:23,680 INFO L125 PetriNetUnfolderBase]: For 10899/11141 co-relation queries the response was YES. [2024-11-20 17:39:23,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11750 conditions, 4087 events. 1996/4087 cut-off events. For 10899/11141 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 28397 event pairs, 647 based on Foata normal form. 24/4069 useless extension candidates. Maximal degree in co-relation 11584. Up to 845 conditions per place. [2024-11-20 17:39:23,702 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 144 selfloop transitions, 32 changer transitions 0/189 dead transitions. [2024-11-20 17:39:23,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 1687 flow [2024-11-20 17:39:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:39:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:39:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 448 transitions. [2024-11-20 17:39:23,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2024-11-20 17:39:23,704 INFO L175 Difference]: Start difference. First operand has 133 places, 101 transitions, 950 flow. Second operand 13 states and 448 transitions. [2024-11-20 17:39:23,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 1687 flow [2024-11-20 17:39:23,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 189 transitions, 1629 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:23,718 INFO L231 Difference]: Finished difference. Result has 141 places, 105 transitions, 1025 flow [2024-11-20 17:39:23,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1025, PETRI_PLACES=141, PETRI_TRANSITIONS=105} [2024-11-20 17:39:23,718 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-11-20 17:39:23,719 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 105 transitions, 1025 flow [2024-11-20 17:39:23,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 26.0) internal successors, (546), 21 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:23,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:23,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:23,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 17:39:23,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-20 17:39:23,920 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:23,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2089822815, now seen corresponding path program 2 times [2024-11-20 17:39:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:23,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721110861] [2024-11-20 17:39:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:24,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721110861] [2024-11-20 17:39:24,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721110861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:24,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940552480] [2024-11-20 17:39:24,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:24,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:24,056 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:24,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:39:24,141 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:39:24,141 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:24,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 17:39:24,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:24,180 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:39:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940552480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:24,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:39:24,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2024-11-20 17:39:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881246064] [2024-11-20 17:39:24,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:24,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:24,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:39:24,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-20 17:39:24,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 105 transitions, 1025 flow. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:24,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:24,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-20 17:39:24,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:24,704 INFO L124 PetriNetUnfolderBase]: 2667/5977 cut-off events. [2024-11-20 17:39:24,705 INFO L125 PetriNetUnfolderBase]: For 18974/19497 co-relation queries the response was YES. [2024-11-20 17:39:24,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16806 conditions, 5977 events. 2667/5977 cut-off events. For 18974/19497 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 49714 event pairs, 403 based on Foata normal form. 22/5899 useless extension candidates. Maximal degree in co-relation 10266. Up to 1999 conditions per place. [2024-11-20 17:39:24,734 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 90 selfloop transitions, 20 changer transitions 20/149 dead transitions. [2024-11-20 17:39:24,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 149 transitions, 1624 flow [2024-11-20 17:39:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2024-11-20 17:39:24,736 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-11-20 17:39:24,736 INFO L175 Difference]: Start difference. First operand has 141 places, 105 transitions, 1025 flow. Second operand 5 states and 216 transitions. [2024-11-20 17:39:24,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 149 transitions, 1624 flow [2024-11-20 17:39:24,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 149 transitions, 1577 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:24,755 INFO L231 Difference]: Finished difference. Result has 142 places, 92 transitions, 896 flow [2024-11-20 17:39:24,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=896, PETRI_PLACES=142, PETRI_TRANSITIONS=92} [2024-11-20 17:39:24,756 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 84 predicate places. [2024-11-20 17:39:24,756 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 92 transitions, 896 flow [2024-11-20 17:39:24,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:24,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:24,757 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:24,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 17:39:24,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-20 17:39:24,958 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:24,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash -269110564, now seen corresponding path program 1 times [2024-11-20 17:39:24,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:24,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891967481] [2024-11-20 17:39:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:25,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:25,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891967481] [2024-11-20 17:39:25,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891967481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504805768] [2024-11-20 17:39:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:25,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:25,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:25,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:25,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:39:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:25,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:39:25,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:25,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:25,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-20 17:39:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:25,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504805768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:25,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:25,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-20 17:39:25,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782658583] [2024-11-20 17:39:25,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:25,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:39:25,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:39:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:39:26,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-20 17:39:26,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 92 transitions, 896 flow. Second operand has 20 states, 20 states have (on average 30.8) internal successors, (616), 20 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:26,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:26,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-20 17:39:26,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:27,027 INFO L124 PetriNetUnfolderBase]: 3038/6121 cut-off events. [2024-11-20 17:39:27,027 INFO L125 PetriNetUnfolderBase]: For 19446/19915 co-relation queries the response was YES. [2024-11-20 17:39:27,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18422 conditions, 6121 events. 3038/6121 cut-off events. For 19446/19915 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 48350 event pairs, 1110 based on Foata normal form. 44/6048 useless extension candidates. Maximal degree in co-relation 11243. Up to 1252 conditions per place. [2024-11-20 17:39:27,054 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 140 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-11-20 17:39:27,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1670 flow [2024-11-20 17:39:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:39:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:39:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 411 transitions. [2024-11-20 17:39:27,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.685 [2024-11-20 17:39:27,056 INFO L175 Difference]: Start difference. First operand has 142 places, 92 transitions, 896 flow. Second operand 10 states and 411 transitions. [2024-11-20 17:39:27,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1670 flow [2024-11-20 17:39:27,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1525 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-11-20 17:39:27,077 INFO L231 Difference]: Finished difference. Result has 126 places, 94 transitions, 853 flow [2024-11-20 17:39:27,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=853, PETRI_PLACES=126, PETRI_TRANSITIONS=94} [2024-11-20 17:39:27,077 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-11-20 17:39:27,078 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 94 transitions, 853 flow [2024-11-20 17:39:27,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.8) internal successors, (616), 20 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:27,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:27,078 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:27,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 17:39:27,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-20 17:39:27,283 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:27,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1918190684, now seen corresponding path program 2 times [2024-11-20 17:39:27,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:27,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266797718] [2024-11-20 17:39:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:27,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:27,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266797718] [2024-11-20 17:39:27,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266797718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:27,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092143886] [2024-11-20 17:39:27,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:27,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:27,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:27,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:27,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:39:27,585 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:39:27,646 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:27,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:39:27,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:27,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:27,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:39:27,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:27,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:39:27,743 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:27,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:27,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092143886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:28,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:28,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:39:28,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664229508] [2024-11-20 17:39:28,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:28,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:39:28,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:39:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:39:28,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-20 17:39:28,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 94 transitions, 853 flow. Second operand has 20 states, 20 states have (on average 27.4) internal successors, (548), 20 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:28,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:28,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-20 17:39:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:30,036 INFO L124 PetriNetUnfolderBase]: 3738/7760 cut-off events. [2024-11-20 17:39:30,036 INFO L125 PetriNetUnfolderBase]: For 24425/24967 co-relation queries the response was YES. [2024-11-20 17:39:30,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22768 conditions, 7760 events. 3738/7760 cut-off events. For 24425/24967 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 63952 event pairs, 1224 based on Foata normal form. 66/7739 useless extension candidates. Maximal degree in co-relation 13066. Up to 1649 conditions per place. [2024-11-20 17:39:30,071 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 140 selfloop transitions, 25 changer transitions 0/183 dead transitions. [2024-11-20 17:39:30,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1746 flow [2024-11-20 17:39:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:39:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:39:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 446 transitions. [2024-11-20 17:39:30,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5717948717948718 [2024-11-20 17:39:30,072 INFO L175 Difference]: Start difference. First operand has 126 places, 94 transitions, 853 flow. Second operand 13 states and 446 transitions. [2024-11-20 17:39:30,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1746 flow [2024-11-20 17:39:30,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1720 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:30,092 INFO L231 Difference]: Finished difference. Result has 137 places, 97 transitions, 919 flow [2024-11-20 17:39:30,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=919, PETRI_PLACES=137, PETRI_TRANSITIONS=97} [2024-11-20 17:39:30,093 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 79 predicate places. [2024-11-20 17:39:30,093 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 97 transitions, 919 flow [2024-11-20 17:39:30,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 27.4) internal successors, (548), 20 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:30,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:30,094 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:30,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 17:39:30,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:30,295 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:30,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1993985884, now seen corresponding path program 1 times [2024-11-20 17:39:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:30,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880070288] [2024-11-20 17:39:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:30,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:30,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880070288] [2024-11-20 17:39:30,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880070288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:30,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915150231] [2024-11-20 17:39:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:30,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:30,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:30,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:30,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:39:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:30,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:39:30,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:30,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:30,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915150231] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:30,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:30,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-20 17:39:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468892908] [2024-11-20 17:39:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:30,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:39:30,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:39:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:39:30,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:30,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 97 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:30,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:30,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:30,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:31,299 INFO L124 PetriNetUnfolderBase]: 3105/6570 cut-off events. [2024-11-20 17:39:31,300 INFO L125 PetriNetUnfolderBase]: For 26299/26906 co-relation queries the response was YES. [2024-11-20 17:39:31,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20768 conditions, 6570 events. 3105/6570 cut-off events. For 26299/26906 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 53020 event pairs, 1232 based on Foata normal form. 183/6620 useless extension candidates. Maximal degree in co-relation 12368. Up to 3028 conditions per place. [2024-11-20 17:39:31,329 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 75 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2024-11-20 17:39:31,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 118 transitions, 1311 flow [2024-11-20 17:39:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-11-20 17:39:31,330 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-20 17:39:31,330 INFO L175 Difference]: Start difference. First operand has 137 places, 97 transitions, 919 flow. Second operand 7 states and 259 transitions. [2024-11-20 17:39:31,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 118 transitions, 1311 flow [2024-11-20 17:39:31,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 118 transitions, 1278 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-20 17:39:31,353 INFO L231 Difference]: Finished difference. Result has 138 places, 98 transitions, 972 flow [2024-11-20 17:39:31,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=138, PETRI_TRANSITIONS=98} [2024-11-20 17:39:31,354 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 80 predicate places. [2024-11-20 17:39:31,354 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 98 transitions, 972 flow [2024-11-20 17:39:31,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:31,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:31,354 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:31,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 17:39:31,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:31,555 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:31,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash -665630324, now seen corresponding path program 1 times [2024-11-20 17:39:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:31,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394413371] [2024-11-20 17:39:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:31,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394413371] [2024-11-20 17:39:31,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394413371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198787960] [2024-11-20 17:39:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:31,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:31,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:31,740 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:31,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 17:39:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:31,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:39:31,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:31,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:32,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-20 17:39:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:32,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198787960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:32,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:32,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-20 17:39:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064516855] [2024-11-20 17:39:32,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:32,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:39:32,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:32,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:39:32,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:39:32,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:39:32,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 98 transitions, 972 flow. Second operand has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:32,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:32,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:39:32,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:33,840 INFO L124 PetriNetUnfolderBase]: 3679/7011 cut-off events. [2024-11-20 17:39:33,840 INFO L125 PetriNetUnfolderBase]: For 30027/30560 co-relation queries the response was YES. [2024-11-20 17:39:33,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23458 conditions, 7011 events. 3679/7011 cut-off events. For 30027/30560 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 52308 event pairs, 973 based on Foata normal form. 66/6924 useless extension candidates. Maximal degree in co-relation 14145. Up to 1545 conditions per place. [2024-11-20 17:39:33,879 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 143 selfloop transitions, 25 changer transitions 0/188 dead transitions. [2024-11-20 17:39:33,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 1870 flow [2024-11-20 17:39:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:39:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:39:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 396 transitions. [2024-11-20 17:39:33,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-20 17:39:33,880 INFO L175 Difference]: Start difference. First operand has 138 places, 98 transitions, 972 flow. Second operand 10 states and 396 transitions. [2024-11-20 17:39:33,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 1870 flow [2024-11-20 17:39:33,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 188 transitions, 1839 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:33,905 INFO L231 Difference]: Finished difference. Result has 145 places, 100 transitions, 1024 flow [2024-11-20 17:39:33,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1024, PETRI_PLACES=145, PETRI_TRANSITIONS=100} [2024-11-20 17:39:33,906 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 87 predicate places. [2024-11-20 17:39:33,906 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 100 transitions, 1024 flow [2024-11-20 17:39:33,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:33,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:33,906 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:33,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:34,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 17:39:34,110 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:34,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1631726976, now seen corresponding path program 3 times [2024-11-20 17:39:34,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:34,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503709853] [2024-11-20 17:39:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:34,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:34,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503709853] [2024-11-20 17:39:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503709853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116096820] [2024-11-20 17:39:34,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:39:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:34,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:34,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 17:39:34,318 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:39:34,318 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:34,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 17:39:34,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:34,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:39:34,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:34,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:34,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:39:34,428 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:34,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 17:39:34,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 17:39:34,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116096820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:34,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:34,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-20 17:39:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700950086] [2024-11-20 17:39:34,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:34,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:39:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:39:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:39:35,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-20 17:39:35,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 100 transitions, 1024 flow. Second operand has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:35,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:35,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-20 17:39:35,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:37,592 INFO L124 PetriNetUnfolderBase]: 6299/11716 cut-off events. [2024-11-20 17:39:37,592 INFO L125 PetriNetUnfolderBase]: For 75125/77006 co-relation queries the response was YES. [2024-11-20 17:39:37,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41368 conditions, 11716 events. 6299/11716 cut-off events. For 75125/77006 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 97222 event pairs, 633 based on Foata normal form. 138/11680 useless extension candidates. Maximal degree in co-relation 24919. Up to 2172 conditions per place. [2024-11-20 17:39:37,657 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 246 selfloop transitions, 46 changer transitions 0/311 dead transitions. [2024-11-20 17:39:37,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 311 transitions, 3481 flow [2024-11-20 17:39:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:39:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:39:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 612 transitions. [2024-11-20 17:39:37,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-20 17:39:37,659 INFO L175 Difference]: Start difference. First operand has 145 places, 100 transitions, 1024 flow. Second operand 17 states and 612 transitions. [2024-11-20 17:39:37,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 311 transitions, 3481 flow [2024-11-20 17:39:37,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 3417 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:37,698 INFO L231 Difference]: Finished difference. Result has 156 places, 118 transitions, 1351 flow [2024-11-20 17:39:37,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1351, PETRI_PLACES=156, PETRI_TRANSITIONS=118} [2024-11-20 17:39:37,698 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 98 predicate places. [2024-11-20 17:39:37,699 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 118 transitions, 1351 flow [2024-11-20 17:39:37,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:37,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:37,699 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:37,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:37,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-20 17:39:37,900 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:37,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 71638690, now seen corresponding path program 3 times [2024-11-20 17:39:37,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:37,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899878616] [2024-11-20 17:39:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:39:38,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:38,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899878616] [2024-11-20 17:39:38,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899878616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:38,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647251298] [2024-11-20 17:39:38,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:39:38,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:38,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:38,012 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:38,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 17:39:38,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:39:38,103 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:38,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:39:38,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:38,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:39:38,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:39:38,168 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:38,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-20 17:39:38,180 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:38,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:39:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:39:38,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:39:38,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647251298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:38,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:38,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-20 17:39:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606580195] [2024-11-20 17:39:38,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:38,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 17:39:38,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 17:39:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-20 17:39:39,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:39:39,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 118 transitions, 1351 flow. Second operand has 22 states, 22 states have (on average 26.681818181818183) internal successors, (587), 22 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:39,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:39,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:39:39,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:42,664 INFO L124 PetriNetUnfolderBase]: 12543/24321 cut-off events. [2024-11-20 17:39:42,664 INFO L125 PetriNetUnfolderBase]: For 105835/106472 co-relation queries the response was YES. [2024-11-20 17:39:42,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83824 conditions, 24321 events. 12543/24321 cut-off events. For 105835/106472 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 217142 event pairs, 1147 based on Foata normal form. 346/24644 useless extension candidates. Maximal degree in co-relation 48783. Up to 3780 conditions per place. [2024-11-20 17:39:42,814 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 302 selfloop transitions, 58 changer transitions 0/377 dead transitions. [2024-11-20 17:39:42,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 377 transitions, 4656 flow [2024-11-20 17:39:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 17:39:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 17:39:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 704 transitions. [2024-11-20 17:39:42,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-20 17:39:42,816 INFO L175 Difference]: Start difference. First operand has 156 places, 118 transitions, 1351 flow. Second operand 22 states and 704 transitions. [2024-11-20 17:39:42,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 377 transitions, 4656 flow [2024-11-20 17:39:43,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 377 transitions, 4590 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:43,025 INFO L231 Difference]: Finished difference. Result has 172 places, 138 transitions, 1729 flow [2024-11-20 17:39:43,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1729, PETRI_PLACES=172, PETRI_TRANSITIONS=138} [2024-11-20 17:39:43,026 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 114 predicate places. [2024-11-20 17:39:43,026 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 138 transitions, 1729 flow [2024-11-20 17:39:43,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.681818181818183) internal successors, (587), 22 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:43,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:43,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:43,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:43,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 17:39:43,227 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:43,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1921934338, now seen corresponding path program 1 times [2024-11-20 17:39:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:43,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805164710] [2024-11-20 17:39:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:43,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:43,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:43,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805164710] [2024-11-20 17:39:43,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805164710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:43,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350255058] [2024-11-20 17:39:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:43,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:43,360 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:43,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 17:39:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:43,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:39:43,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:43,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:39:43,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350255058] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:43,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:43,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-20 17:39:43,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43512903] [2024-11-20 17:39:43,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:43,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:39:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:39:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:39:43,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-11-20 17:39:43,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 138 transitions, 1729 flow. Second operand has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:43,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:43,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-11-20 17:39:43,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:45,932 INFO L124 PetriNetUnfolderBase]: 7012/14799 cut-off events. [2024-11-20 17:39:45,933 INFO L125 PetriNetUnfolderBase]: For 88963/90790 co-relation queries the response was YES. [2024-11-20 17:39:45,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53585 conditions, 14799 events. 7012/14799 cut-off events. For 88963/90790 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 140247 event pairs, 3090 based on Foata normal form. 436/14879 useless extension candidates. Maximal degree in co-relation 44616. Up to 6879 conditions per place. [2024-11-20 17:39:46,021 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 103 selfloop transitions, 37 changer transitions 0/165 dead transitions. [2024-11-20 17:39:46,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 165 transitions, 2364 flow [2024-11-20 17:39:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-11-20 17:39:46,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-11-20 17:39:46,022 INFO L175 Difference]: Start difference. First operand has 172 places, 138 transitions, 1729 flow. Second operand 7 states and 261 transitions. [2024-11-20 17:39:46,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 165 transitions, 2364 flow [2024-11-20 17:39:46,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 165 transitions, 2234 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-20 17:39:46,125 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1719 flow [2024-11-20 17:39:46,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2024-11-20 17:39:46,126 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 113 predicate places. [2024-11-20 17:39:46,126 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1719 flow [2024-11-20 17:39:46,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:46,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:46,126 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:46,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 17:39:46,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 17:39:46,327 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:46,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -81974301, now seen corresponding path program 2 times [2024-11-20 17:39:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:46,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206191288] [2024-11-20 17:39:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:46,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:39:46,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206191288] [2024-11-20 17:39:46,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206191288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012568828] [2024-11-20 17:39:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:46,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:46,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:46,458 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:46,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 17:39:46,523 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:39:46,523 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:46,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:39:46,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:46,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:39:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-20 17:39:46,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-20 17:39:47,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012568828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:47,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:47,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-20 17:39:47,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54390346] [2024-11-20 17:39:47,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:47,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:39:47,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:39:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:39:48,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:48,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1719 flow. Second operand has 19 states, 19 states have (on average 28.842105263157894) internal successors, (548), 19 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:48,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:48,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:48,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:50,575 INFO L124 PetriNetUnfolderBase]: 9479/16982 cut-off events. [2024-11-20 17:39:50,575 INFO L125 PetriNetUnfolderBase]: For 108417/110519 co-relation queries the response was YES. [2024-11-20 17:39:50,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64740 conditions, 16982 events. 9479/16982 cut-off events. For 108417/110519 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 144329 event pairs, 1214 based on Foata normal form. 160/16922 useless extension candidates. Maximal degree in co-relation 55165. Up to 4491 conditions per place. [2024-11-20 17:39:50,683 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 220 selfloop transitions, 75 changer transitions 0/310 dead transitions. [2024-11-20 17:39:50,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 310 transitions, 3927 flow [2024-11-20 17:39:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 17:39:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 17:39:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 657 transitions. [2024-11-20 17:39:50,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763157894736842 [2024-11-20 17:39:50,685 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1719 flow. Second operand 19 states and 657 transitions. [2024-11-20 17:39:50,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 310 transitions, 3927 flow [2024-11-20 17:39:50,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 310 transitions, 3775 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-20 17:39:50,791 INFO L231 Difference]: Finished difference. Result has 182 places, 158 transitions, 2116 flow [2024-11-20 17:39:50,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2116, PETRI_PLACES=182, PETRI_TRANSITIONS=158} [2024-11-20 17:39:50,791 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 124 predicate places. [2024-11-20 17:39:50,791 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 158 transitions, 2116 flow [2024-11-20 17:39:50,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 28.842105263157894) internal successors, (548), 19 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:50,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:50,792 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:50,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 17:39:50,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:50,993 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:50,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 535567551, now seen corresponding path program 2 times [2024-11-20 17:39:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:50,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190470812] [2024-11-20 17:39:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:39:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190470812] [2024-11-20 17:39:51,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190470812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363607023] [2024-11-20 17:39:51,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:51,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:51,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:51,221 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:51,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 17:39:51,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:39:51,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:51,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:39:51,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:51,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:39:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-20 17:39:51,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-20 17:39:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363607023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:52,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-20 17:39:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129537015] [2024-11-20 17:39:52,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:52,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:39:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:39:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:39:52,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:52,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 158 transitions, 2116 flow. Second operand has 19 states, 19 states have (on average 29.157894736842106) internal successors, (554), 19 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) [2024-11-20 17:39:52,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:52,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:52,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:55,250 INFO L124 PetriNetUnfolderBase]: 9360/16697 cut-off events. [2024-11-20 17:39:55,250 INFO L125 PetriNetUnfolderBase]: For 93839/95350 co-relation queries the response was YES. [2024-11-20 17:39:55,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62127 conditions, 16697 events. 9360/16697 cut-off events. For 93839/95350 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 139567 event pairs, 1658 based on Foata normal form. 113/16632 useless extension candidates. Maximal degree in co-relation 52212. Up to 4277 conditions per place. [2024-11-20 17:39:55,359 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 263 selfloop transitions, 62 changer transitions 0/347 dead transitions. [2024-11-20 17:39:55,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 347 transitions, 4852 flow [2024-11-20 17:39:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:39:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:39:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 590 transitions. [2024-11-20 17:39:55,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-11-20 17:39:55,361 INFO L175 Difference]: Start difference. First operand has 182 places, 158 transitions, 2116 flow. Second operand 17 states and 590 transitions. [2024-11-20 17:39:55,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 347 transitions, 4852 flow [2024-11-20 17:39:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 347 transitions, 4752 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-20 17:39:55,508 INFO L231 Difference]: Finished difference. Result has 190 places, 178 transitions, 2497 flow [2024-11-20 17:39:55,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2497, PETRI_PLACES=190, PETRI_TRANSITIONS=178} [2024-11-20 17:39:55,509 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 132 predicate places. [2024-11-20 17:39:55,509 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 178 transitions, 2497 flow [2024-11-20 17:39:55,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 29.157894736842106) internal successors, (554), 19 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) [2024-11-20 17:39:55,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:55,509 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:55,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:55,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:55,710 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:55,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash 475901292, now seen corresponding path program 1 times [2024-11-20 17:39:55,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:55,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017735251] [2024-11-20 17:39:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:55,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:39:56,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017735251] [2024-11-20 17:39:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017735251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597984368] [2024-11-20 17:39:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:56,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:56,025 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:39:56,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 17:39:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:56,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:39:56,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:39:56,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:39:56,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597984368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:56,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:56,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-20 17:39:56,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760376695] [2024-11-20 17:39:56,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:56,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 17:39:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 17:39:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:39:56,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-11-20 17:39:56,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 178 transitions, 2497 flow. Second operand has 24 states, 24 states have (on average 33.875) internal successors, (813), 24 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:56,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:56,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-11-20 17:39:56,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:58,446 INFO L124 PetriNetUnfolderBase]: 5913/12663 cut-off events. [2024-11-20 17:39:58,447 INFO L125 PetriNetUnfolderBase]: For 86012/87279 co-relation queries the response was YES. [2024-11-20 17:39:58,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48750 conditions, 12663 events. 5913/12663 cut-off events. For 86012/87279 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 120232 event pairs, 3224 based on Foata normal form. 25/12221 useless extension candidates. Maximal degree in co-relation 44623. Up to 8788 conditions per place. [2024-11-20 17:39:58,534 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 154 selfloop transitions, 60 changer transitions 1/258 dead transitions. [2024-11-20 17:39:58,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 258 transitions, 3439 flow [2024-11-20 17:39:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 17:39:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 17:39:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 689 transitions. [2024-11-20 17:39:58,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.637962962962963 [2024-11-20 17:39:58,536 INFO L175 Difference]: Start difference. First operand has 190 places, 178 transitions, 2497 flow. Second operand 18 states and 689 transitions. [2024-11-20 17:39:58,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 258 transitions, 3439 flow [2024-11-20 17:39:58,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 258 transitions, 3398 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:58,640 INFO L231 Difference]: Finished difference. Result has 205 places, 192 transitions, 2762 flow [2024-11-20 17:39:58,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2762, PETRI_PLACES=205, PETRI_TRANSITIONS=192} [2024-11-20 17:39:58,641 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 147 predicate places. [2024-11-20 17:39:58,641 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 192 transitions, 2762 flow [2024-11-20 17:39:58,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 33.875) internal successors, (813), 24 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:58,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:58,642 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:58,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-20 17:39:58,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:58,842 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:39:58,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:58,843 INFO L85 PathProgramCache]: Analyzing trace with hash -560551367, now seen corresponding path program 1 times [2024-11-20 17:39:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:58,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224874433] [2024-11-20 17:39:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:58,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:39:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224874433] [2024-11-20 17:39:59,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224874433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:59,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:59,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-20 17:39:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665280439] [2024-11-20 17:39:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:59,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:39:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:39:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:39:59,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:39:59,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 192 transitions, 2762 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:59,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:59,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:39:59,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:02,305 INFO L124 PetriNetUnfolderBase]: 10799/20641 cut-off events. [2024-11-20 17:40:02,305 INFO L125 PetriNetUnfolderBase]: For 118183/118534 co-relation queries the response was YES. [2024-11-20 17:40:02,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82175 conditions, 20641 events. 10799/20641 cut-off events. For 118183/118534 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 179735 event pairs, 5336 based on Foata normal form. 421/21043 useless extension candidates. Maximal degree in co-relation 75806. Up to 11116 conditions per place. [2024-11-20 17:40:02,481 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 325 selfloop transitions, 72 changer transitions 0/417 dead transitions. [2024-11-20 17:40:02,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 417 transitions, 6425 flow [2024-11-20 17:40:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:40:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:40:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 411 transitions. [2024-11-20 17:40:02,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-11-20 17:40:02,482 INFO L175 Difference]: Start difference. First operand has 205 places, 192 transitions, 2762 flow. Second operand 11 states and 411 transitions. [2024-11-20 17:40:02,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 417 transitions, 6425 flow [2024-11-20 17:40:02,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 417 transitions, 6388 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-20 17:40:02,863 INFO L231 Difference]: Finished difference. Result has 212 places, 211 transitions, 3271 flow [2024-11-20 17:40:02,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3271, PETRI_PLACES=212, PETRI_TRANSITIONS=211} [2024-11-20 17:40:02,863 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 154 predicate places. [2024-11-20 17:40:02,863 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 211 transitions, 3271 flow [2024-11-20 17:40:02,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:02,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:02,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:02,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-20 17:40:02,864 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:40:02,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1402275315, now seen corresponding path program 2 times [2024-11-20 17:40:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:02,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512876147] [2024-11-20 17:40:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:02,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:03,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:03,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512876147] [2024-11-20 17:40:03,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512876147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:03,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507794995] [2024-11-20 17:40:03,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:40:03,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:03,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:03,199 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:40:03,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 17:40:03,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:40:03,295 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:40:03,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 17:40:03,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:03,425 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 17:40:03,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-20 17:40:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:03,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:03,536 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-20 17:40:03,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-20 17:40:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:03,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507794995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:03,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:03,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2024-11-20 17:40:03,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108664146] [2024-11-20 17:40:03,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:03,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:40:03,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:40:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:40:04,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:40:04,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 211 transitions, 3271 flow. Second operand has 21 states, 21 states have (on average 30.428571428571427) internal successors, (639), 21 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:04,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:04,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:40:04,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:07,802 INFO L124 PetriNetUnfolderBase]: 12081/23275 cut-off events. [2024-11-20 17:40:07,802 INFO L125 PetriNetUnfolderBase]: For 154104/154467 co-relation queries the response was YES. [2024-11-20 17:40:07,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99764 conditions, 23275 events. 12081/23275 cut-off events. For 154104/154467 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 208782 event pairs, 5873 based on Foata normal form. 497/23727 useless extension candidates. Maximal degree in co-relation 92684. Up to 11310 conditions per place. [2024-11-20 17:40:07,997 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 262 selfloop transitions, 142 changer transitions 2/426 dead transitions. [2024-11-20 17:40:07,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 426 transitions, 6916 flow [2024-11-20 17:40:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:40:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:40:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 456 transitions. [2024-11-20 17:40:07,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-20 17:40:07,999 INFO L175 Difference]: Start difference. First operand has 212 places, 211 transitions, 3271 flow. Second operand 12 states and 456 transitions. [2024-11-20 17:40:07,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 426 transitions, 6916 flow [2024-11-20 17:40:08,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 426 transitions, 6533 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-11-20 17:40:08,515 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 4934 flow [2024-11-20 17:40:08,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4934, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-11-20 17:40:08,516 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 167 predicate places. [2024-11-20 17:40:08,516 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 4934 flow [2024-11-20 17:40:08,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.428571428571427) internal successors, (639), 21 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:08,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:08,516 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:08,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-20 17:40:08,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:08,717 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-20 17:40:08,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash -520114727, now seen corresponding path program 1 times [2024-11-20 17:40:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230156338] [2024-11-20 17:40:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:09,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230156338] [2024-11-20 17:40:09,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230156338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126345114] [2024-11-20 17:40:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:09,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:09,083 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:40:09,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 17:40:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:09,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:40:09,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:09,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:09,460 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 17:40:09,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-20 17:40:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126345114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:09,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-11-20 17:40:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763454420] [2024-11-20 17:40:09,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:09,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:40:09,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:40:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:40:10,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:40:10,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 4934 flow. Second operand has 25 states, 25 states have (on average 30.2) internal successors, (755), 25 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:10,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:10,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:40:10,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:15,861 INFO L124 PetriNetUnfolderBase]: 15927/30475 cut-off events. [2024-11-20 17:40:15,861 INFO L125 PetriNetUnfolderBase]: For 215476/215950 co-relation queries the response was YES. [2024-11-20 17:40:16,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135385 conditions, 30475 events. 15927/30475 cut-off events. For 215476/215950 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 281440 event pairs, 4856 based on Foata normal form. 627/31079 useless extension candidates. Maximal degree in co-relation 125666. Up to 7308 conditions per place. [2024-11-20 17:40:16,211 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 454 selfloop transitions, 198 changer transitions 4/676 dead transitions. [2024-11-20 17:40:16,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 676 transitions, 12114 flow [2024-11-20 17:40:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:40:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:40:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 547 transitions. [2024-11-20 17:40:16,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6511904761904762 [2024-11-20 17:40:16,213 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 4934 flow. Second operand 14 states and 547 transitions. [2024-11-20 17:40:16,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 676 transitions, 12114 flow