./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-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:52:16,223 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:52:16,301 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:52:16,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:52:16,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:52:16,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:52:16,335 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:52:16,336 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:52:16,337 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:52:16,338 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:52:16,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:52:16,339 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:52:16,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:52:16,340 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:52:16,340 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:52:16,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:52:16,341 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:52:16,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:52:16,344 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:52:16,344 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:52:16,344 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:52:16,345 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:52:16,345 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:52:16,345 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:52:16,346 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:52:16,346 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:52:16,346 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:52:16,346 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:52:16,347 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:52:16,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:52:16,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:52:16,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:52:16,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:52:16,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:52:16,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:52:16,353 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:52:16,353 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:52:16,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:52:16,354 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:52:16,354 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:52:16,354 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:52:16,355 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:52:16,355 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-10-11 19:52:16,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:52:16,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:52:16,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:52:16,678 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:52:16,679 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:52:16,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-10-11 19:52:18,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:52:18,330 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:52:18,331 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-10-11 19:52:18,341 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c6fdd418a/cf3acc6c5f994456ae70a919d1e7ba7d/FLAG5a21b2026 [2024-10-11 19:52:18,360 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c6fdd418a/cf3acc6c5f994456ae70a919d1e7ba7d [2024-10-11 19:52:18,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:52:18,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:52:18,370 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:52:18,370 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:52:18,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:52:18,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12851e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18, skipping insertion in model container [2024-10-11 19:52:18,380 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,414 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:52:18,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:52:18,690 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:52:18,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:52:18,754 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:52:18,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18 WrapperNode [2024-10-11 19:52:18,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:52:18,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:52:18,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:52:18,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:52:18,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,775 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,815 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 409 [2024-10-11 19:52:18,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:52:18,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:52:18,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:52:18,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:52:18,831 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,856 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 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]. [2024-10-11 19:52:18,857 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,857 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,877 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,879 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,883 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:52:18,884 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:52:18,884 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:52:18,884 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:52:18,885 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (1/1) ... [2024-10-11 19:52:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:52:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:18,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:52:18,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:52:18,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:52:18,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:52:18,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:52:18,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:52:18,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:52:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:52:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:52:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:52:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:52:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:52:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:52:18,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:52:18,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:52:18,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:52:18,997 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:52:19,135 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:52:19,137 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:52:19,927 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:52:19,927 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:52:20,512 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:52:20,512 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 19:52:20,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:52:20 BoogieIcfgContainer [2024-10-11 19:52:20,513 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:52:20,516 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:52:20,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:52:20,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:52:20,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:52:18" (1/3) ... [2024-10-11 19:52:20,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d243a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:52:20, skipping insertion in model container [2024-10-11 19:52:20,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:52:18" (2/3) ... [2024-10-11 19:52:20,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d243a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:52:20, skipping insertion in model container [2024-10-11 19:52:20,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:52:20" (3/3) ... [2024-10-11 19:52:20,525 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-10-11 19:52:20,544 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:52:20,545 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-10-11 19:52:20,545 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:52:20,638 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:52:20,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 126 transitions, 266 flow [2024-10-11 19:52:20,737 INFO L124 PetriNetUnfolderBase]: 20/124 cut-off events. [2024-10-11 19:52:20,737 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:52:20,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 20/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2024-10-11 19:52:20,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 126 transitions, 266 flow [2024-10-11 19:52:20,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 123 transitions, 258 flow [2024-10-11 19:52:20,762 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:52:20,768 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;@48d717b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:52:20,768 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2024-10-11 19:52:20,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:52:20,771 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:52:20,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:52:20,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:20,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:52:20,773 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:20,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1300439, now seen corresponding path program 1 times [2024-10-11 19:52:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:20,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688330879] [2024-10-11 19:52:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:20,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:21,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:21,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688330879] [2024-10-11 19:52:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688330879] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:21,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:21,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:52:21,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52195129] [2024-10-11 19:52:21,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:21,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:52:21,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:52:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:52:21,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-11 19:52:21,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:21,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:21,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-11 19:52:21,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:21,897 INFO L124 PetriNetUnfolderBase]: 1446/3461 cut-off events. [2024-10-11 19:52:21,898 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-10-11 19:52:21,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 3461 events. 1446/3461 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25244 event pairs, 790 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 5456. Up to 2083 conditions per place. [2024-10-11 19:52:21,930 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 56 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-10-11 19:52:21,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 362 flow [2024-10-11 19:52:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:52:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:52:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-10-11 19:52:21,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-10-11 19:52:21,946 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 258 flow. Second operand 3 states and 249 transitions. [2024-10-11 19:52:21,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 362 flow [2024-10-11 19:52:21,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:52:21,955 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 242 flow [2024-10-11 19:52:21,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-10-11 19:52:21,963 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-10-11 19:52:21,963 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 242 flow [2024-10-11 19:52:21,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:21,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:21,964 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:52:21,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:52:21,965 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:21,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1300440, now seen corresponding path program 1 times [2024-10-11 19:52:21,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:21,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167297474] [2024-10-11 19:52:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:21,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:22,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:22,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167297474] [2024-10-11 19:52:22,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167297474] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:22,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:22,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:52:22,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033482] [2024-10-11 19:52:22,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:22,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:52:22,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:22,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:52:22,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:52:22,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-11 19:52:22,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:22,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:22,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-11 19:52:22,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:22,785 INFO L124 PetriNetUnfolderBase]: 1446/3465 cut-off events. [2024-10-11 19:52:22,785 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-11 19:52:22,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 3465 events. 1446/3465 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25213 event pairs, 790 based on Foata normal form. 1/2628 useless extension candidates. Maximal degree in co-relation 5549. Up to 2091 conditions per place. [2024-10-11 19:52:22,808 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 60 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-10-11 19:52:22,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 378 flow [2024-10-11 19:52:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:52:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:52:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-10-11 19:52:22,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-10-11 19:52:22,811 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 242 flow. Second operand 3 states and 254 transitions. [2024-10-11 19:52:22,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 378 flow [2024-10-11 19:52:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:52:22,815 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 264 flow [2024-10-11 19:52:22,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-10-11 19:52:22,816 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2024-10-11 19:52:22,816 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 264 flow [2024-10-11 19:52:22,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:22,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:22,817 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:52:22,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:52:22,817 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:22,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1249764370, now seen corresponding path program 1 times [2024-10-11 19:52:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:22,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329152946] [2024-10-11 19:52:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:22,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:23,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:23,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329152946] [2024-10-11 19:52:23,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329152946] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:23,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73153823] [2024-10-11 19:52:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:23,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:23,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:23,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:23,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:52:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:23,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 19:52:23,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:23,270 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 [2024-10-11 19:52:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:23,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:23,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73153823] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:23,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:52:23,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:52:23,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003480858] [2024-10-11 19:52:23,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:23,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:52:23,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:52:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:52:23,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-11 19:52:23,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:23,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:23,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-11 19:52:23,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:24,209 INFO L124 PetriNetUnfolderBase]: 1452/3483 cut-off events. [2024-10-11 19:52:24,210 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-11 19:52:24,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 3483 events. 1452/3483 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25257 event pairs, 790 based on Foata normal form. 0/2646 useless extension candidates. Maximal degree in co-relation 5584. Up to 2094 conditions per place. [2024-10-11 19:52:24,233 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 66 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-10-11 19:52:24,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 495 flow [2024-10-11 19:52:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:52:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:52:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2024-10-11 19:52:24,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-10-11 19:52:24,237 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 264 flow. Second operand 6 states and 460 transitions. [2024-10-11 19:52:24,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 495 flow [2024-10-11 19:52:24,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:52:24,241 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 376 flow [2024-10-11 19:52:24,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-10-11 19:52:24,243 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2024-10-11 19:52:24,243 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 376 flow [2024-10-11 19:52:24,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:24,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:24,244 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:52:24,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:52:24,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:24,449 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:24,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1847960000, now seen corresponding path program 2 times [2024-10-11 19:52:24,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:24,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086623685] [2024-10-11 19:52:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:24,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086623685] [2024-10-11 19:52:24,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086623685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:24,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424229831] [2024-10-11 19:52:24,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:52:24,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:24,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:24,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:52:24,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:52:24,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:52:24,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 19:52:24,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:25,005 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 [2024-10-11 19:52:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:25,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:25,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424229831] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:25,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:52:25,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-11 19:52:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790692708] [2024-10-11 19:52:25,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:25,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 19:52:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 19:52:25,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-10-11 19:52:26,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-11 19:52:26,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 376 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:26,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:26,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-11 19:52:26,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:27,780 INFO L124 PetriNetUnfolderBase]: 1454/3489 cut-off events. [2024-10-11 19:52:27,781 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-10-11 19:52:27,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5696 conditions, 3489 events. 1454/3489 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25342 event pairs, 790 based on Foata normal form. 2/2656 useless extension candidates. Maximal degree in co-relation 5603. Up to 2095 conditions per place. [2024-10-11 19:52:27,807 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 68 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2024-10-11 19:52:27,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 145 transitions, 596 flow [2024-10-11 19:52:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:52:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:52:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-10-11 19:52:27,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5941043083900227 [2024-10-11 19:52:27,809 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 376 flow. Second operand 7 states and 524 transitions. [2024-10-11 19:52:27,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 145 transitions, 596 flow [2024-10-11 19:52:27,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 570 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-10-11 19:52:27,815 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 430 flow [2024-10-11 19:52:27,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-10-11 19:52:27,816 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 8 predicate places. [2024-10-11 19:52:27,817 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 430 flow [2024-10-11 19:52:27,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:27,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:27,818 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:27,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:52:28,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:28,023 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:28,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 989591744, now seen corresponding path program 1 times [2024-10-11 19:52:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667472284] [2024-10-11 19:52:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:52:28,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:28,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667472284] [2024-10-11 19:52:28,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667472284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:28,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832931440] [2024-10-11 19:52:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:28,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:28,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:28,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:28,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:52:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:28,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:52:28,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:52:28,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:52:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832931440] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:28,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:52:28,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-11 19:52:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934324459] [2024-10-11 19:52:28,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:28,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:52:28,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:28,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:52:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:52:28,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-11 19:52:28,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 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) [2024-10-11 19:52:28,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:28,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-11 19:52:28,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:28,793 INFO L124 PetriNetUnfolderBase]: 1448/3483 cut-off events. [2024-10-11 19:52:28,793 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-10-11 19:52:28,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 3483 events. 1448/3483 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25177 event pairs, 790 based on Foata normal form. 6/2654 useless extension candidates. Maximal degree in co-relation 5589. Up to 2090 conditions per place. [2024-10-11 19:52:28,820 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 61 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-10-11 19:52:28,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 557 flow [2024-10-11 19:52:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:52:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:52:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 462 transitions. [2024-10-11 19:52:28,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-11 19:52:28,823 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 430 flow. Second operand 6 states and 462 transitions. [2024-10-11 19:52:28,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 557 flow [2024-10-11 19:52:28,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 137 transitions, 528 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-11 19:52:28,828 INFO L231 Difference]: Finished difference. Result has 120 places, 131 transitions, 409 flow [2024-10-11 19:52:28,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=120, PETRI_TRANSITIONS=131} [2024-10-11 19:52:28,830 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-10-11 19:52:28,832 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 131 transitions, 409 flow [2024-10-11 19:52:28,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 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) [2024-10-11 19:52:28,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:28,833 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-10-11 19:52:28,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:52:29,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:29,038 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:29,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2068108282, now seen corresponding path program 3 times [2024-10-11 19:52:29,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:29,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309436743] [2024-10-11 19:52:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:29,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:29,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309436743] [2024-10-11 19:52:29,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309436743] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225169440] [2024-10-11 19:52:29,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:52:29,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:29,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:29,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:52:29,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 19:52:29,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:52:29,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:52:29,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:29,265 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 [2024-10-11 19:52:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-11 19:52:29,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-11 19:52:29,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225169440] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:29,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:52:29,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-10-11 19:52:29,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426120636] [2024-10-11 19:52:29,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:29,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:52:29,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:52:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:52:29,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-10-11 19:52:29,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 409 flow. Second operand has 14 states, 14 states have (on average 63.785714285714285) internal successors, (893), 14 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:29,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:29,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-10-11 19:52:29,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:30,661 INFO L124 PetriNetUnfolderBase]: 1446/3477 cut-off events. [2024-10-11 19:52:30,661 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-11 19:52:30,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 3477 events. 1446/3477 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25146 event pairs, 790 based on Foata normal form. 2/2644 useless extension candidates. Maximal degree in co-relation 5587. Up to 2084 conditions per place. [2024-10-11 19:52:30,687 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 55 selfloop transitions, 21 changer transitions 0/133 dead transitions. [2024-10-11 19:52:30,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 133 transitions, 539 flow [2024-10-11 19:52:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:52:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:52:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 760 transitions. [2024-10-11 19:52:30,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483405483405484 [2024-10-11 19:52:30,690 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 409 flow. Second operand 11 states and 760 transitions. [2024-10-11 19:52:30,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 133 transitions, 539 flow [2024-10-11 19:52:30,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 133 transitions, 507 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-10-11 19:52:30,695 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 405 flow [2024-10-11 19:52:30,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=405, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-10-11 19:52:30,696 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 13 predicate places. [2024-10-11 19:52:30,697 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 405 flow [2024-10-11 19:52:30,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.785714285714285) internal successors, (893), 14 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:30,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:30,699 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:30,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:52:30,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 19:52:30,904 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:30,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 610411437, now seen corresponding path program 2 times [2024-10-11 19:52:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:30,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535307424] [2024-10-11 19:52:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:30,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 19:52:31,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535307424] [2024-10-11 19:52:31,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535307424] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394381180] [2024-10-11 19:52:31,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:52:31,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:31,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:31,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:52:31,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:52:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:52:31,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 19:52:31,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:31,224 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 [2024-10-11 19:52:31,234 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 [2024-10-11 19:52:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:52:31,307 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 14 treesize of output 9 [2024-10-11 19:52:31,324 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:52:31,325 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 [2024-10-11 19:52:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 19:52:31,398 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:52:31,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394381180] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:31,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:52:31,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-10-11 19:52:31,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030160941] [2024-10-11 19:52:31,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:31,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:52:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:52:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:52:31,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-10-11 19:52:31,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 405 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:31,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:31,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-10-11 19:52:31,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:32,268 INFO L124 PetriNetUnfolderBase]: 3171/6786 cut-off events. [2024-10-11 19:52:32,269 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-11 19:52:32,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 6786 events. 3171/6786 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 48102 event pairs, 1228 based on Foata normal form. 0/5445 useless extension candidates. Maximal degree in co-relation 11460. Up to 2561 conditions per place. [2024-10-11 19:52:32,389 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 118 selfloop transitions, 7 changer transitions 0/178 dead transitions. [2024-10-11 19:52:32,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 178 transitions, 752 flow [2024-10-11 19:52:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:52:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:52:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-10-11 19:52:32,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097883597883598 [2024-10-11 19:52:32,391 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 405 flow. Second operand 6 states and 461 transitions. [2024-10-11 19:52:32,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 178 transitions, 752 flow [2024-10-11 19:52:32,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 178 transitions, 681 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-10-11 19:52:32,395 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 362 flow [2024-10-11 19:52:32,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-10-11 19:52:32,397 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 8 predicate places. [2024-10-11 19:52:32,397 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 362 flow [2024-10-11 19:52:32,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:32,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:32,398 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:32,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 19:52:32,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:32,602 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:32,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash 610411436, now seen corresponding path program 1 times [2024-10-11 19:52:32,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:32,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241100404] [2024-10-11 19:52:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 19:52:32,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:32,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241100404] [2024-10-11 19:52:32,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241100404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50488192] [2024-10-11 19:52:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:32,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:32,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:32,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 19:52:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:32,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:52:32,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 19:52:33,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 19:52:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50488192] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:33,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:52:33,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 19:52:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047813394] [2024-10-11 19:52:33,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:33,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:52:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:52:33,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:52:33,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-11 19:52:33,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 362 flow. Second operand has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:33,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:33,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-11 19:52:33,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:33,816 INFO L124 PetriNetUnfolderBase]: 2756/6501 cut-off events. [2024-10-11 19:52:33,817 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2024-10-11 19:52:33,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10868 conditions, 6501 events. 2756/6501 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 49033 event pairs, 1536 based on Foata normal form. 2/5155 useless extension candidates. Maximal degree in co-relation 10795. Up to 3984 conditions per place. [2024-10-11 19:52:33,848 INFO L140 encePairwiseOnDemand]: 121/126 looper letters, 63 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2024-10-11 19:52:33,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 132 transitions, 516 flow [2024-10-11 19:52:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:52:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:52:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 524 transitions. [2024-10-11 19:52:33,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5941043083900227 [2024-10-11 19:52:33,851 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 362 flow. Second operand 7 states and 524 transitions. [2024-10-11 19:52:33,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 132 transitions, 516 flow [2024-10-11 19:52:33,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 132 transitions, 508 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:52:33,853 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 366 flow [2024-10-11 19:52:33,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-10-11 19:52:33,854 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-10-11 19:52:33,854 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 366 flow [2024-10-11 19:52:33,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:33,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:33,855 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:33,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 19:52:34,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 19:52:34,060 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:34,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash -820950917, now seen corresponding path program 2 times [2024-10-11 19:52:34,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:34,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434046712] [2024-10-11 19:52:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-11 19:52:34,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:34,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434046712] [2024-10-11 19:52:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434046712] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:52:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583041193] [2024-10-11 19:52:34,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:34,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:52:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:52:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:52:34,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-10-11 19:52:34,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:34,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:34,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-10-11 19:52:34,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:34,940 INFO L124 PetriNetUnfolderBase]: 2756/6139 cut-off events. [2024-10-11 19:52:34,940 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-11 19:52:34,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10459 conditions, 6139 events. 2756/6139 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 43887 event pairs, 1536 based on Foata normal form. 0/4997 useless extension candidates. Maximal degree in co-relation 10379. Up to 3981 conditions per place. [2024-10-11 19:52:34,973 INFO L140 encePairwiseOnDemand]: 115/126 looper letters, 70 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-10-11 19:52:34,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 122 transitions, 496 flow [2024-10-11 19:52:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:52:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:52:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-10-11 19:52:34,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-10-11 19:52:34,976 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 366 flow. Second operand 5 states and 336 transitions. [2024-10-11 19:52:34,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 122 transitions, 496 flow [2024-10-11 19:52:34,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 122 transitions, 472 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 19:52:34,979 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 332 flow [2024-10-11 19:52:34,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-10-11 19:52:34,981 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2024-10-11 19:52:34,982 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 332 flow [2024-10-11 19:52:34,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:34,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:34,982 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:34,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:52:34,983 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:34,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:34,983 INFO L85 PathProgramCache]: Analyzing trace with hash 612564798, now seen corresponding path program 1 times [2024-10-11 19:52:34,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:34,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329052137] [2024-10-11 19:52:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-11 19:52:35,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:35,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329052137] [2024-10-11 19:52:35,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329052137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:35,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:35,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:52:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314502420] [2024-10-11 19:52:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:35,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:52:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:52:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:52:35,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-10-11 19:52:35,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:35,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:35,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-10-11 19:52:35,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:35,828 INFO L124 PetriNetUnfolderBase]: 2756/5801 cut-off events. [2024-10-11 19:52:35,828 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-10-11 19:52:35,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10112 conditions, 5801 events. 2756/5801 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 38939 event pairs, 1536 based on Foata normal form. 0/4997 useless extension candidates. Maximal degree in co-relation 10039. Up to 3981 conditions per place. [2024-10-11 19:52:35,853 INFO L140 encePairwiseOnDemand]: 116/126 looper letters, 71 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-10-11 19:52:35,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 114 transitions, 462 flow [2024-10-11 19:52:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:52:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:52:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-10-11 19:52:35,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-10-11 19:52:35,856 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 332 flow. Second operand 4 states and 282 transitions. [2024-10-11 19:52:35,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 114 transitions, 462 flow [2024-10-11 19:52:35,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:52:35,859 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 315 flow [2024-10-11 19:52:35,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=315, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-10-11 19:52:35,860 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2024-10-11 19:52:35,860 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 315 flow [2024-10-11 19:52:35,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:35,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:35,861 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:35,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:52:35,861 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:35,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash 612564799, now seen corresponding path program 1 times [2024-10-11 19:52:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:35,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703407451] [2024-10-11 19:52:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 19:52:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703407451] [2024-10-11 19:52:36,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703407451] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773832867] [2024-10-11 19:52:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:36,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:36,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:36,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:36,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 19:52:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:36,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:52:36,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 19:52:36,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:36,727 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 20 treesize of output 16 [2024-10-11 19:52:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 19:52:36,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773832867] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:36,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:52:36,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-11 19:52:36,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890744786] [2024-10-11 19:52:36,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:36,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 19:52:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 19:52:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-10-11 19:52:37,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-10-11 19:52:37,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 315 flow. Second operand has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:37,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:37,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-10-11 19:52:37,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:39,308 INFO L124 PetriNetUnfolderBase]: 6335/12030 cut-off events. [2024-10-11 19:52:39,309 INFO L125 PetriNetUnfolderBase]: For 373/373 co-relation queries the response was YES. [2024-10-11 19:52:39,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21814 conditions, 12030 events. 6335/12030 cut-off events. For 373/373 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 82248 event pairs, 1161 based on Foata normal form. 0/10496 useless extension candidates. Maximal degree in co-relation 21742. Up to 3752 conditions per place. [2024-10-11 19:52:39,367 INFO L140 encePairwiseOnDemand]: 114/126 looper letters, 140 selfloop transitions, 15 changer transitions 0/192 dead transitions. [2024-10-11 19:52:39,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 192 transitions, 809 flow [2024-10-11 19:52:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:52:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:52:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 760 transitions. [2024-10-11 19:52:39,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-10-11 19:52:39,371 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 315 flow. Second operand 10 states and 760 transitions. [2024-10-11 19:52:39,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 192 transitions, 809 flow [2024-10-11 19:52:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 192 transitions, 806 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:52:39,375 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 355 flow [2024-10-11 19:52:39,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=355, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2024-10-11 19:52:39,376 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -1 predicate places. [2024-10-11 19:52:39,376 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 355 flow [2024-10-11 19:52:39,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:39,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:39,378 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:39,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 19:52:39,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:39,578 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:39,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1340197152, now seen corresponding path program 1 times [2024-10-11 19:52:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:39,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675380120] [2024-10-11 19:52:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:39,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 19:52:39,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675380120] [2024-10-11 19:52:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675380120] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:39,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880200073] [2024-10-11 19:52:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:39,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:39,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:39,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:39,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 19:52:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:40,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:52:40,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 19:52:40,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:40,382 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 20 treesize of output 16 [2024-10-11 19:52:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 19:52:40,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880200073] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:52:40,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:52:40,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-11 19:52:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472925830] [2024-10-11 19:52:40,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:52:40,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 19:52:40,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 19:52:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-10-11 19:52:41,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-10-11 19:52:41,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 355 flow. Second operand has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:41,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:41,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-10-11 19:52:41,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:43,431 INFO L124 PetriNetUnfolderBase]: 9458/18099 cut-off events. [2024-10-11 19:52:43,431 INFO L125 PetriNetUnfolderBase]: For 2121/2199 co-relation queries the response was YES. [2024-10-11 19:52:43,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34540 conditions, 18099 events. 9458/18099 cut-off events. For 2121/2199 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 129737 event pairs, 2682 based on Foata normal form. 0/15482 useless extension candidates. Maximal degree in co-relation 34458. Up to 5035 conditions per place. [2024-10-11 19:52:43,522 INFO L140 encePairwiseOnDemand]: 111/126 looper letters, 160 selfloop transitions, 18 changer transitions 0/212 dead transitions. [2024-10-11 19:52:43,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 212 transitions, 965 flow [2024-10-11 19:52:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:52:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:52:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 780 transitions. [2024-10-11 19:52:43,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-10-11 19:52:43,524 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 355 flow. Second operand 10 states and 780 transitions. [2024-10-11 19:52:43,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 212 transitions, 965 flow [2024-10-11 19:52:43,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 212 transitions, 944 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 19:52:43,531 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 423 flow [2024-10-11 19:52:43,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=423, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2024-10-11 19:52:43,532 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2024-10-11 19:52:43,532 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 423 flow [2024-10-11 19:52:43,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:43,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:43,533 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:43,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 19:52:43,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 19:52:43,733 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:43,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:43,734 INFO L85 PathProgramCache]: Analyzing trace with hash 264298883, now seen corresponding path program 1 times [2024-10-11 19:52:43,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:43,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826800306] [2024-10-11 19:52:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:43,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 19:52:44,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:44,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826800306] [2024-10-11 19:52:44,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826800306] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:44,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676523672] [2024-10-11 19:52:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:44,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:52:44,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:52:44,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 19:52:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:44,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-11 19:52:44,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:52:44,332 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 [2024-10-11 19:52:44,471 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 19:52:44,471 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 12 treesize of output 14 [2024-10-11 19:52:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:52:44,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:52:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 19:52:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676523672] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 19:52:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:52:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 14] total 27 [2024-10-11 19:52:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123414190] [2024-10-11 19:52:45,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:45,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:52:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:52:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2024-10-11 19:52:45,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-10-11 19:52:45,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 423 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:45,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:45,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-10-11 19:52:45,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:47,132 INFO L124 PetriNetUnfolderBase]: 11437/20897 cut-off events. [2024-10-11 19:52:47,132 INFO L125 PetriNetUnfolderBase]: For 6526/6896 co-relation queries the response was YES. [2024-10-11 19:52:47,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42458 conditions, 20897 events. 11437/20897 cut-off events. For 6526/6896 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 148032 event pairs, 4244 based on Foata normal form. 0/17841 useless extension candidates. Maximal degree in co-relation 42373. Up to 8345 conditions per place. [2024-10-11 19:52:47,226 INFO L140 encePairwiseOnDemand]: 113/126 looper letters, 125 selfloop transitions, 10 changer transitions 0/169 dead transitions. [2024-10-11 19:52:47,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 849 flow [2024-10-11 19:52:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:52:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:52:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2024-10-11 19:52:47,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-10-11 19:52:47,228 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 423 flow. Second operand 6 states and 471 transitions. [2024-10-11 19:52:47,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 849 flow [2024-10-11 19:52:47,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 169 transitions, 824 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 19:52:47,240 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 467 flow [2024-10-11 19:52:47,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-10-11 19:52:47,242 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2024-10-11 19:52:47,242 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 467 flow [2024-10-11 19:52:47,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:47,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:47,242 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:47,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 19:52:47,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:52:47,443 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:47,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash 996480192, now seen corresponding path program 1 times [2024-10-11 19:52:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:47,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744779685] [2024-10-11 19:52:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:52:48,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:48,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744779685] [2024-10-11 19:52:48,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744779685] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:48,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:48,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:52:48,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645243201] [2024-10-11 19:52:48,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:48,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:52:48,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:52:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:52:48,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-11 19:52:48,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:48,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:48,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-11 19:52:48,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:50,081 INFO L124 PetriNetUnfolderBase]: 11067/20724 cut-off events. [2024-10-11 19:52:50,081 INFO L125 PetriNetUnfolderBase]: For 10637/10999 co-relation queries the response was YES. [2024-10-11 19:52:50,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44758 conditions, 20724 events. 11067/20724 cut-off events. For 10637/10999 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 149393 event pairs, 6581 based on Foata normal form. 6/18204 useless extension candidates. Maximal degree in co-relation 44677. Up to 15445 conditions per place. [2024-10-11 19:52:50,213 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 115 selfloop transitions, 1 changer transitions 9/163 dead transitions. [2024-10-11 19:52:50,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 163 transitions, 854 flow [2024-10-11 19:52:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:52:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:52:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2024-10-11 19:52:50,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6924603174603174 [2024-10-11 19:52:50,215 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 467 flow. Second operand 4 states and 349 transitions. [2024-10-11 19:52:50,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 163 transitions, 854 flow [2024-10-11 19:52:50,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 163 transitions, 849 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:52:50,224 INFO L231 Difference]: Finished difference. Result has 117 places, 123 transitions, 471 flow [2024-10-11 19:52:50,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=471, PETRI_PLACES=117, PETRI_TRANSITIONS=123} [2024-10-11 19:52:50,225 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 7 predicate places. [2024-10-11 19:52:50,225 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 471 flow [2024-10-11 19:52:50,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:50,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:50,225 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:50,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 19:52:50,225 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:50,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash -635832396, now seen corresponding path program 2 times [2024-10-11 19:52:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:50,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661897188] [2024-10-11 19:52:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:50,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:52:51,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:51,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661897188] [2024-10-11 19:52:51,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661897188] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:51,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:51,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:52:51,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005761163] [2024-10-11 19:52:51,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:51,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:52:51,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:52:51,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:52:51,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-11 19:52:51,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 471 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:51,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:51,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-11 19:52:51,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:53,489 INFO L124 PetriNetUnfolderBase]: 11348/21235 cut-off events. [2024-10-11 19:52:53,489 INFO L125 PetriNetUnfolderBase]: For 11498/11872 co-relation queries the response was YES. [2024-10-11 19:52:53,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46115 conditions, 21235 events. 11348/21235 cut-off events. For 11498/11872 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 153413 event pairs, 6935 based on Foata normal form. 5/18688 useless extension candidates. Maximal degree in co-relation 46039. Up to 16057 conditions per place. [2024-10-11 19:52:53,615 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 114 selfloop transitions, 1 changer transitions 7/160 dead transitions. [2024-10-11 19:52:53,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 837 flow [2024-10-11 19:52:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:52:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:52:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2024-10-11 19:52:53,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6884920634920635 [2024-10-11 19:52:53,617 INFO L175 Difference]: Start difference. First operand has 117 places, 123 transitions, 471 flow. Second operand 4 states and 347 transitions. [2024-10-11 19:52:53,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 837 flow [2024-10-11 19:52:53,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 831 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-11 19:52:53,628 INFO L231 Difference]: Finished difference. Result has 119 places, 123 transitions, 477 flow [2024-10-11 19:52:53,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=477, PETRI_PLACES=119, PETRI_TRANSITIONS=123} [2024-10-11 19:52:53,629 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 9 predicate places. [2024-10-11 19:52:53,629 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 123 transitions, 477 flow [2024-10-11 19:52:53,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:53,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:53,629 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:53,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 19:52:53,629 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:53,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:53,630 INFO L85 PathProgramCache]: Analyzing trace with hash 727076855, now seen corresponding path program 1 times [2024-10-11 19:52:53,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:53,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38244317] [2024-10-11 19:52:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:53,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:52:53,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38244317] [2024-10-11 19:52:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38244317] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:53,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:53,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:52:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240608887] [2024-10-11 19:52:53,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:53,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:52:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:52:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:52:53,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-11 19:52:53,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 123 transitions, 477 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:53,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:53,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-11 19:52:53,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:55,495 INFO L124 PetriNetUnfolderBase]: 10621/19866 cut-off events. [2024-10-11 19:52:55,495 INFO L125 PetriNetUnfolderBase]: For 11805/12179 co-relation queries the response was YES. [2024-10-11 19:52:55,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43214 conditions, 19866 events. 10621/19866 cut-off events. For 11805/12179 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 142204 event pairs, 4027 based on Foata normal form. 159/17592 useless extension candidates. Maximal degree in co-relation 43161. Up to 15441 conditions per place. [2024-10-11 19:52:55,619 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 88 selfloop transitions, 2 changer transitions 5/133 dead transitions. [2024-10-11 19:52:55,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 133 transitions, 706 flow [2024-10-11 19:52:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:52:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:52:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2024-10-11 19:52:55,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6931216931216931 [2024-10-11 19:52:55,620 INFO L175 Difference]: Start difference. First operand has 119 places, 123 transitions, 477 flow. Second operand 3 states and 262 transitions. [2024-10-11 19:52:55,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 133 transitions, 706 flow [2024-10-11 19:52:55,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 133 transitions, 703 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 19:52:55,629 INFO L231 Difference]: Finished difference. Result has 119 places, 123 transitions, 493 flow [2024-10-11 19:52:55,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=493, PETRI_PLACES=119, PETRI_TRANSITIONS=123} [2024-10-11 19:52:55,629 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 9 predicate places. [2024-10-11 19:52:55,630 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 123 transitions, 493 flow [2024-10-11 19:52:55,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:55,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:55,630 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:55,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 19:52:55,630 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:55,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash -797962211, now seen corresponding path program 1 times [2024-10-11 19:52:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672370329] [2024-10-11 19:52:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:52:55,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672370329] [2024-10-11 19:52:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672370329] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:55,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:55,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:52:55,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927475813] [2024-10-11 19:52:55,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:55,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:52:55,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:52:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:52:55,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-10-11 19:52:55,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 123 transitions, 493 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:55,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:55,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-10-11 19:52:55,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:52:57,537 INFO L124 PetriNetUnfolderBase]: 10274/20031 cut-off events. [2024-10-11 19:52:57,537 INFO L125 PetriNetUnfolderBase]: For 12397/12743 co-relation queries the response was YES. [2024-10-11 19:52:57,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43921 conditions, 20031 events. 10274/20031 cut-off events. For 12397/12743 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 150697 event pairs, 5916 based on Foata normal form. 84/17667 useless extension candidates. Maximal degree in co-relation 43840. Up to 12728 conditions per place. [2024-10-11 19:52:57,678 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 122 selfloop transitions, 3 changer transitions 0/163 dead transitions. [2024-10-11 19:52:57,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 163 transitions, 892 flow [2024-10-11 19:52:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:52:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:52:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-10-11 19:52:57,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-10-11 19:52:57,679 INFO L175 Difference]: Start difference. First operand has 119 places, 123 transitions, 493 flow. Second operand 3 states and 282 transitions. [2024-10-11 19:52:57,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 163 transitions, 892 flow [2024-10-11 19:52:57,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 163 transitions, 882 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-11 19:52:57,708 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 500 flow [2024-10-11 19:52:57,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=500, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-10-11 19:52:57,708 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 8 predicate places. [2024-10-11 19:52:57,708 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 500 flow [2024-10-11 19:52:57,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:57,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:52:57,709 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:52:57,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 19:52:57,709 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:52:57,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:52:57,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1185376447, now seen corresponding path program 1 times [2024-10-11 19:52:57,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:52:57,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147761798] [2024-10-11 19:52:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:52:57,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:52:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:52:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:52:57,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:52:57,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147761798] [2024-10-11 19:52:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147761798] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:52:57,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:52:57,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 19:52:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206806290] [2024-10-11 19:52:57,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:52:57,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:52:57,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:52:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:52:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:52:57,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-10-11 19:52:57,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 500 flow. Second operand has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:52:57,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:52:57,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-10-11 19:52:57,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:53:00,358 INFO L124 PetriNetUnfolderBase]: 15143/26762 cut-off events. [2024-10-11 19:53:00,358 INFO L125 PetriNetUnfolderBase]: For 15938/16600 co-relation queries the response was YES. [2024-10-11 19:53:00,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61678 conditions, 26762 events. 15143/26762 cut-off events. For 15938/16600 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 193818 event pairs, 6573 based on Foata normal form. 0/24106 useless extension candidates. Maximal degree in co-relation 61597. Up to 14595 conditions per place. [2024-10-11 19:53:00,557 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 216 selfloop transitions, 8 changer transitions 0/257 dead transitions. [2024-10-11 19:53:00,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 257 transitions, 1473 flow [2024-10-11 19:53:00,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:53:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:53:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-10-11 19:53:00,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-10-11 19:53:00,559 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 500 flow. Second operand 6 states and 528 transitions. [2024-10-11 19:53:00,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 257 transitions, 1473 flow [2024-10-11 19:53:00,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 257 transitions, 1468 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:53:00,581 INFO L231 Difference]: Finished difference. Result has 124 places, 125 transitions, 535 flow [2024-10-11 19:53:00,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=535, PETRI_PLACES=124, PETRI_TRANSITIONS=125} [2024-10-11 19:53:00,582 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 14 predicate places. [2024-10-11 19:53:00,582 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 125 transitions, 535 flow [2024-10-11 19:53:00,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:00,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:53:00,582 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:53:00,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 19:53:00,583 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:53:00,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:53:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash -302967060, now seen corresponding path program 1 times [2024-10-11 19:53:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:53:00,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244910970] [2024-10-11 19:53:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:53:00,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:53:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:53:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:53:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:53:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244910970] [2024-10-11 19:53:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244910970] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:53:00,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:53:00,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 19:53:00,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145415400] [2024-10-11 19:53:00,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:53:00,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:53:00,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:53:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:53:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:53:00,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-10-11 19:53:00,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 125 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:00,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:53:00,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-10-11 19:53:00,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:53:03,446 INFO L124 PetriNetUnfolderBase]: 15034/26555 cut-off events. [2024-10-11 19:53:03,446 INFO L125 PetriNetUnfolderBase]: For 19247/19815 co-relation queries the response was YES. [2024-10-11 19:53:03,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64367 conditions, 26555 events. 15034/26555 cut-off events. For 19247/19815 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 190172 event pairs, 6307 based on Foata normal form. 220/24935 useless extension candidates. Maximal degree in co-relation 64283. Up to 12041 conditions per place. [2024-10-11 19:53:03,719 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 176 selfloop transitions, 12 changer transitions 0/221 dead transitions. [2024-10-11 19:53:03,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 221 transitions, 1294 flow [2024-10-11 19:53:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:53:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:53:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2024-10-11 19:53:03,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-10-11 19:53:03,721 INFO L175 Difference]: Start difference. First operand has 124 places, 125 transitions, 535 flow. Second operand 5 states and 438 transitions. [2024-10-11 19:53:03,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 221 transitions, 1294 flow [2024-10-11 19:53:03,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 221 transitions, 1287 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:53:03,794 INFO L231 Difference]: Finished difference. Result has 128 places, 126 transitions, 571 flow [2024-10-11 19:53:03,795 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=571, PETRI_PLACES=128, PETRI_TRANSITIONS=126} [2024-10-11 19:53:03,795 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 18 predicate places. [2024-10-11 19:53:03,795 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 126 transitions, 571 flow [2024-10-11 19:53:03,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:03,796 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:53:03,796 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:53:03,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 19:53:03,796 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:53:03,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:53:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -830229087, now seen corresponding path program 1 times [2024-10-11 19:53:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:53:03,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115951750] [2024-10-11 19:53:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:53:03,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:53:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:53:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:53:04,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:53:04,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115951750] [2024-10-11 19:53:04,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115951750] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:53:04,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:53:04,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 19:53:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143697749] [2024-10-11 19:53:04,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:53:04,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:53:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:53:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:53:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:53:04,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-10-11 19:53:04,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 126 transitions, 571 flow. Second operand has 6 states, 6 states have (on average 62.5) internal successors, (375), 6 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:04,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:53:04,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-10-11 19:53:04,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:53:08,117 INFO L124 PetriNetUnfolderBase]: 21537/36772 cut-off events. [2024-10-11 19:53:08,117 INFO L125 PetriNetUnfolderBase]: For 35580/36680 co-relation queries the response was YES. [2024-10-11 19:53:08,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94749 conditions, 36772 events. 21537/36772 cut-off events. For 35580/36680 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 269396 event pairs, 10259 based on Foata normal form. 330/34944 useless extension candidates. Maximal degree in co-relation 94664. Up to 21117 conditions per place. [2024-10-11 19:53:08,450 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 256 selfloop transitions, 9 changer transitions 0/296 dead transitions. [2024-10-11 19:53:08,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 296 transitions, 1799 flow [2024-10-11 19:53:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:53:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:53:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 604 transitions. [2024-10-11 19:53:08,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6848072562358276 [2024-10-11 19:53:08,451 INFO L175 Difference]: Start difference. First operand has 128 places, 126 transitions, 571 flow. Second operand 7 states and 604 transitions. [2024-10-11 19:53:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 296 transitions, 1799 flow [2024-10-11 19:53:08,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 296 transitions, 1780 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-11 19:53:08,574 INFO L231 Difference]: Finished difference. Result has 135 places, 130 transitions, 612 flow [2024-10-11 19:53:08,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=612, PETRI_PLACES=135, PETRI_TRANSITIONS=130} [2024-10-11 19:53:08,575 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 25 predicate places. [2024-10-11 19:53:08,575 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 130 transitions, 612 flow [2024-10-11 19:53:08,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.5) internal successors, (375), 6 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:08,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:53:08,575 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:53:08,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-11 19:53:08,575 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:53:08,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:53:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash -441653110, now seen corresponding path program 1 times [2024-10-11 19:53:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:53:08,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272924357] [2024-10-11 19:53:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:53:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:53:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:53:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:53:08,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:53:08,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272924357] [2024-10-11 19:53:08,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272924357] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:53:08,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:53:08,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 19:53:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821254340] [2024-10-11 19:53:08,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:53:08,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:53:08,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:53:08,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:53:08,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:53:08,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-10-11 19:53:08,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 130 transitions, 612 flow. Second operand has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:08,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:53:08,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-10-11 19:53:08,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:53:11,889 INFO L124 PetriNetUnfolderBase]: 18933/34050 cut-off events. [2024-10-11 19:53:11,889 INFO L125 PetriNetUnfolderBase]: For 39824/40764 co-relation queries the response was YES. [2024-10-11 19:53:12,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89375 conditions, 34050 events. 18933/34050 cut-off events. For 39824/40764 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 259304 event pairs, 9341 based on Foata normal form. 480/32592 useless extension candidates. Maximal degree in co-relation 89287. Up to 17473 conditions per place. [2024-10-11 19:53:12,256 INFO L140 encePairwiseOnDemand]: 118/126 looper letters, 181 selfloop transitions, 10 changer transitions 0/225 dead transitions. [2024-10-11 19:53:12,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 1373 flow [2024-10-11 19:53:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:53:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:53:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2024-10-11 19:53:12,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2024-10-11 19:53:12,257 INFO L175 Difference]: Start difference. First operand has 135 places, 130 transitions, 612 flow. Second operand 5 states and 438 transitions. [2024-10-11 19:53:12,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 1373 flow [2024-10-11 19:53:12,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 1369 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:53:12,368 INFO L231 Difference]: Finished difference. Result has 139 places, 130 transitions, 632 flow [2024-10-11 19:53:12,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=139, PETRI_TRANSITIONS=130} [2024-10-11 19:53:12,368 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 29 predicate places. [2024-10-11 19:53:12,369 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 130 transitions, 632 flow [2024-10-11 19:53:12,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:12,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:53:12,369 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:53:12,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-11 19:53:12,369 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:53:12,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:53:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash -792827386, now seen corresponding path program 1 times [2024-10-11 19:53:12,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:53:12,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229435472] [2024-10-11 19:53:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:53:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:53:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:53:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 19:53:12,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:53:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229435472] [2024-10-11 19:53:12,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229435472] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:53:12,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271409843] [2024-10-11 19:53:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:53:12,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:53:12,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:53:12,752 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:53:12,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 19:53:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:53:12,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:53:12,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:53:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 19:53:12,980 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:53:12,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271409843] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:53:12,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:53:12,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-10-11 19:53:12,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128055583] [2024-10-11 19:53:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:53:12,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:53:12,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:53:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:53:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:53:12,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 126 [2024-10-11 19:53:12,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 130 transitions, 632 flow. Second operand has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:12,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:53:12,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 126 [2024-10-11 19:53:12,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:53:18,450 INFO L124 PetriNetUnfolderBase]: 25561/48354 cut-off events. [2024-10-11 19:53:18,450 INFO L125 PetriNetUnfolderBase]: For 73363/74671 co-relation queries the response was YES. [2024-10-11 19:53:19,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128291 conditions, 48354 events. 25561/48354 cut-off events. For 73363/74671 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 407358 event pairs, 13041 based on Foata normal form. 486/45770 useless extension candidates. Maximal degree in co-relation 128201. Up to 25619 conditions per place. [2024-10-11 19:53:19,417 INFO L140 encePairwiseOnDemand]: 118/126 looper letters, 285 selfloop transitions, 6 changer transitions 0/326 dead transitions. [2024-10-11 19:53:19,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 326 transitions, 2410 flow [2024-10-11 19:53:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:53:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:53:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 616 transitions. [2024-10-11 19:53:19,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-10-11 19:53:19,418 INFO L175 Difference]: Start difference. First operand has 139 places, 130 transitions, 632 flow. Second operand 7 states and 616 transitions. [2024-10-11 19:53:19,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 326 transitions, 2410 flow [2024-10-11 19:53:19,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 326 transitions, 2361 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-10-11 19:53:19,527 INFO L231 Difference]: Finished difference. Result has 147 places, 133 transitions, 658 flow [2024-10-11 19:53:19,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=658, PETRI_PLACES=147, PETRI_TRANSITIONS=133} [2024-10-11 19:53:19,528 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 37 predicate places. [2024-10-11 19:53:19,528 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 133 transitions, 658 flow [2024-10-11 19:53:19,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:19,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:53:19,529 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 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] [2024-10-11 19:53:19,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 19:53:19,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 19:53:19,730 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-10-11 19:53:19,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:53:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1248501891, now seen corresponding path program 1 times [2024-10-11 19:53:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:53:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028808840] [2024-10-11 19:53:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:53:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:53:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:53:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-11 19:53:20,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:53:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028808840] [2024-10-11 19:53:20,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028808840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:53:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518580507] [2024-10-11 19:53:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:53:20,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:53:20,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:53:20,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:53:20,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 19:53:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:53:20,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 19:53:20,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:53:20,676 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 [2024-10-11 19:53:20,683 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 [2024-10-11 19:53:20,872 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:53:20,873 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 [2024-10-11 19:53:20,881 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 14 treesize of output 9 [2024-10-11 19:53:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:53:21,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:53:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 19:53:21,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518580507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:53:21,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:53:21,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 9] total 31 [2024-10-11 19:53:21,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653857449] [2024-10-11 19:53:21,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:53:21,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 19:53:21,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:53:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 19:53:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 19:53:24,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-10-11 19:53:24,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 133 transitions, 658 flow. Second operand has 33 states, 33 states have (on average 57.36363636363637) internal successors, (1893), 33 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:53:24,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:53:24,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-10-11 19:53:24,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand