./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:45:58,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:45:58,917 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:45:58,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:45:58,924 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:45:58,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:45:58,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:45:58,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:45:58,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:45:58,951 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:45:58,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:45:58,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:45:58,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:45:58,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:45:58,952 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:45:58,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:45:58,953 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:45:58,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:45:58,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:45:58,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:45:58,954 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:45:58,954 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:45:58,955 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:45:58,955 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:45:58,955 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:45:58,955 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:45:58,956 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:45:58,956 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:45:58,956 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:45:58,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:45:58,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:45:58,957 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:45:58,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:45:58,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:45:58,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:45:58,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:45:58,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:45:58,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:45:58,958 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:45:58,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:45:58,959 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:45:58,959 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:45:58,959 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-09 10:45:59,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:45:59,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:45:59,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:45:59,161 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:45:59,161 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:45:59,162 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-09 10:46:00,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:46:00,693 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:46:00,694 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-09 10:46:00,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5394f3ec/c6ded600f6c54dd2944a421e7c584da7/FLAG30b932078 [2024-11-09 10:46:00,716 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5394f3ec/c6ded600f6c54dd2944a421e7c584da7 [2024-11-09 10:46:00,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:46:00,719 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:46:00,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:46:00,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:46:00,725 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:46:00,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:00,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19892ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00, skipping insertion in model container [2024-11-09 10:46:00,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:00,755 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:46:00,921 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:46:00,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:46:00,934 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:46:00,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:46:00,977 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:46:00,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00 WrapperNode [2024-11-09 10:46:00,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:46:00,979 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:46:00,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:46:00,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:46:00,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:00,995 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,018 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 273 [2024-11-09 10:46:01,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:46:01,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:46:01,019 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:46:01,019 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:46:01,029 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,033 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,046 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-09 10:46:01,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,054 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,059 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:46:01,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:46:01,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:46:01,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:46:01,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (1/1) ... [2024-11-09 10:46:01,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:46:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:01,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:46:01,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:46:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:46:01,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:46:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:46:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:46:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:46:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:46:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:46:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:46:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:46:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:46:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:46:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:46:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:46:01,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:46:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:46:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:46:01,130 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:46:01,230 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:46:01,236 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:46:01,680 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:46:01,681 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:46:02,070 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:46:02,071 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:46:02,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:02 BoogieIcfgContainer [2024-11-09 10:46:02,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:46:02,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:46:02,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:46:02,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:46:02,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:46:00" (1/3) ... [2024-11-09 10:46:02,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c3c4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:02, skipping insertion in model container [2024-11-09 10:46:02,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:00" (2/3) ... [2024-11-09 10:46:02,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c3c4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:02, skipping insertion in model container [2024-11-09 10:46:02,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:02" (3/3) ... [2024-11-09 10:46:02,079 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-09 10:46:02,095 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:46:02,095 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-09 10:46:02,095 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:46:02,166 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:46:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-09 10:46:02,242 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-09 10:46:02,243 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:46:02,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 148 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-09 10:46:02,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-09 10:46:02,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-09 10:46:02,266 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:46:02,278 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;@32a0fe75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:46:02,281 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-09 10:46:02,284 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:46:02,287 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:46:02,287 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:46:02,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:02,288 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:46:02,288 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:02,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash 885590, now seen corresponding path program 1 times [2024-11-09 10:46:02,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:02,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747778950] [2024-11-09 10:46:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:02,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:02,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:02,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747778950] [2024-11-09 10:46:02,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747778950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:02,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:02,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:46:02,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542681183] [2024-11-09 10:46:02,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:02,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:46:02,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:46:02,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:46:02,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:02,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:02,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:02,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:02,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:02,742 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-11-09 10:46:02,742 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-09 10:46:02,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2079 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2024-11-09 10:46:02,750 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-09 10:46:02,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-11-09 10:46:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:46:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:46:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-09 10:46:02,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-09 10:46:02,764 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-11-09 10:46:02,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-11-09 10:46:02,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:02,772 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-09 10:46:02,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-09 10:46:02,779 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-09 10:46:02,780 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-09 10:46:02,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:02,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:02,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:46:02,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:46:02,781 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:02,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash 885591, now seen corresponding path program 1 times [2024-11-09 10:46:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981295106] [2024-11-09 10:46:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:02,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981295106] [2024-11-09 10:46:02,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981295106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:02,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:02,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:46:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256634894] [2024-11-09 10:46:02,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:02,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:02,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:02,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:02,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:02,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:02,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:02,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:03,136 INFO L124 PetriNetUnfolderBase]: 202/449 cut-off events. [2024-11-09 10:46:03,136 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:46:03,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 449 events. 202/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2080 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 734. Up to 305 conditions per place. [2024-11-09 10:46:03,140 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-09 10:46:03,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2024-11-09 10:46:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:46:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:46:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-09 10:46:03,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-11-09 10:46:03,142 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-11-09 10:46:03,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2024-11-09 10:46:03,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:03,144 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2024-11-09 10:46:03,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-11-09 10:46:03,145 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-09 10:46:03,145 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2024-11-09 10:46:03,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:03,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:03,145 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:46:03,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:46:03,146 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:03,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash 851081330, now seen corresponding path program 1 times [2024-11-09 10:46:03,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:03,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194433314] [2024-11-09 10:46:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:03,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:03,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:03,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194433314] [2024-11-09 10:46:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194433314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:03,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161509129] [2024-11-09 10:46:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:03,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:03,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:46:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:03,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:46:03,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:03,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:03,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:03,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161509129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:03,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:03,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-09 10:46:03,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951926337] [2024-11-09 10:46:03,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:03,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:46:03,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:46:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:46:03,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:03,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:03,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:03,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:03,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:04,066 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-11-09 10:46:04,067 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:46:04,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 473 events. 208/473 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2128 event pairs, 124 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 766. Up to 307 conditions per place. [2024-11-09 10:46:04,070 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-11-09 10:46:04,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 358 flow [2024-11-09 10:46:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-09 10:46:04,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-09 10:46:04,072 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2024-11-09 10:46:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 358 flow [2024-11-09 10:46:04,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:46:04,074 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 292 flow [2024-11-09 10:46:04,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2024-11-09 10:46:04,074 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-09 10:46:04,075 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 292 flow [2024-11-09 10:46:04,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:04,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:04,075 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-09 10:46:04,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:46:04,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:04,280 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:04,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:04,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1431238467, now seen corresponding path program 2 times [2024-11-09 10:46:04,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:04,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970725318] [2024-11-09 10:46:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:04,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970725318] [2024-11-09 10:46:04,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970725318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:04,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970896251] [2024-11-09 10:46:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:46:04,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:04,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:04,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:46:04,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:46:04,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:04,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:46:04,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:04,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:04,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:04,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970896251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:04,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:04,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-09 10:46:04,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644703307] [2024-11-09 10:46:04,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:04,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:46:04,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:46:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:46:05,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:05,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 292 flow. Second operand has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:05,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:05,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:05,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:06,100 INFO L124 PetriNetUnfolderBase]: 211/482 cut-off events. [2024-11-09 10:46:06,100 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-09 10:46:06,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 482 events. 211/482 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2171 event pairs, 124 based on Foata normal form. 3/404 useless extension candidates. Maximal degree in co-relation 798. Up to 308 conditions per place. [2024-11-09 10:46:06,104 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 44 selfloop transitions, 27 changer transitions 0/90 dead transitions. [2024-11-09 10:46:06,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 500 flow [2024-11-09 10:46:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:46:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:46:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-11-09 10:46:06,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-11-09 10:46:06,110 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 292 flow. Second operand 7 states and 256 transitions. [2024-11-09 10:46:06,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 500 flow [2024-11-09 10:46:06,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 466 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-09 10:46:06,112 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 371 flow [2024-11-09 10:46:06,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=371, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-11-09 10:46:06,113 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-09 10:46:06,113 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 371 flow [2024-11-09 10:46:06,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:06,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:06,114 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-11-09 10:46:06,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:46:06,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 10:46:06,317 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:06,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1030660446, now seen corresponding path program 3 times [2024-11-09 10:46:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:06,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113736394] [2024-11-09 10:46:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:06,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:46:06,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:06,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113736394] [2024-11-09 10:46:06,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113736394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:06,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938226346] [2024-11-09 10:46:06,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:46:06,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:06,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:06,448 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:06,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:46:06,518 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:46:06,518 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:06,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:46:06,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:06,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 10:46:06,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 10:46:06,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938226346] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:06,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:06,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-09 10:46:06,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480732607] [2024-11-09 10:46:06,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:06,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:46:06,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:46:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:46:06,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-09 10:46:06,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 371 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:06,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:06,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-09 10:46:06,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:07,287 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-11-09 10:46:07,288 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-09 10:46:07,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 473 events. 208/473 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2128 event pairs, 124 based on Foata normal form. 3/395 useless extension candidates. Maximal degree in co-relation 837. Up to 296 conditions per place. [2024-11-09 10:46:07,291 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 25 selfloop transitions, 37 changer transitions 0/81 dead transitions. [2024-11-09 10:46:07,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 459 flow [2024-11-09 10:46:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:46:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:46:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 351 transitions. [2024-11-09 10:46:07,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-11-09 10:46:07,292 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 371 flow. Second operand 11 states and 351 transitions. [2024-11-09 10:46:07,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 459 flow [2024-11-09 10:46:07,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 369 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-09 10:46:07,295 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 331 flow [2024-11-09 10:46:07,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2024-11-09 10:46:07,296 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-11-09 10:46:07,296 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 331 flow [2024-11-09 10:46:07,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:07,296 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:07,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:46:07,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:07,501 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:07,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash -738357287, now seen corresponding path program 1 times [2024-11-09 10:46:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:07,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903219158] [2024-11-09 10:46:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:07,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:46:07,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:07,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903219158] [2024-11-09 10:46:07,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903219158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:07,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691244454] [2024-11-09 10:46:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:07,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:07,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:46:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:07,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:46:07,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:46:07,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:46:07,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691244454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:07,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:07,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-09 10:46:07,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724182114] [2024-11-09 10:46:07,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:07,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:46:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:46:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:46:07,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-09 10:46:07,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 331 flow. Second operand has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:07,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-09 10:46:07,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:07,947 INFO L124 PetriNetUnfolderBase]: 199/464 cut-off events. [2024-11-09 10:46:07,947 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:46:07,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 464 events. 199/464 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2068 event pairs, 124 based on Foata normal form. 9/392 useless extension candidates. Maximal degree in co-relation 739. Up to 296 conditions per place. [2024-11-09 10:46:07,949 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 35 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-11-09 10:46:07,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 376 flow [2024-11-09 10:46:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:46:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:46:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 265 transitions. [2024-11-09 10:46:07,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-09 10:46:07,951 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 331 flow. Second operand 7 states and 265 transitions. [2024-11-09 10:46:07,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 376 flow [2024-11-09 10:46:07,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 322 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-09 10:46:07,953 INFO L231 Difference]: Finished difference. Result has 61 places, 72 transitions, 252 flow [2024-11-09 10:46:07,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=72} [2024-11-09 10:46:07,954 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-09 10:46:07,954 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 72 transitions, 252 flow [2024-11-09 10:46:07,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 11 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:07,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:07,954 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:07,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:46:08,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:08,159 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:08,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2018924306, now seen corresponding path program 2 times [2024-11-09 10:46:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:08,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067616666] [2024-11-09 10:46:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 10:46:08,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:08,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067616666] [2024-11-09 10:46:08,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067616666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:08,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:08,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:08,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723614432] [2024-11-09 10:46:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:08,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:46:08,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:46:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:46:08,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-09 10:46:08,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:08,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:08,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-09 10:46:08,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:08,584 INFO L124 PetriNetUnfolderBase]: 340/744 cut-off events. [2024-11-09 10:46:08,585 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 10:46:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 744 events. 340/744 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4007 event pairs, 234 based on Foata normal form. 0/633 useless extension candidates. Maximal degree in co-relation 1226. Up to 494 conditions per place. [2024-11-09 10:46:08,588 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-09 10:46:08,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 358 flow [2024-11-09 10:46:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:46:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:46:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-09 10:46:08,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-09 10:46:08,590 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 252 flow. Second operand 5 states and 143 transitions. [2024-11-09 10:46:08,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 358 flow [2024-11-09 10:46:08,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 322 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:08,591 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 218 flow [2024-11-09 10:46:08,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2024-11-09 10:46:08,592 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2024-11-09 10:46:08,592 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 218 flow [2024-11-09 10:46:08,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:08,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:08,593 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:08,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:46:08,593 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:08,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2018924307, now seen corresponding path program 1 times [2024-11-09 10:46:08,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:08,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733774677] [2024-11-09 10:46:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:09,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733774677] [2024-11-09 10:46:09,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733774677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:09,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259569371] [2024-11-09 10:46:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:09,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:09,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:09,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:46:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:09,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 10:46:09,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:09,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:46:09,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:09,526 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:09,526 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 14 treesize of output 13 [2024-11-09 10:46:09,543 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:09,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:09,778 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-09 10:46:09,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2024-11-09 10:46:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:10,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:10,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259569371] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:10,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:10,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9] total 29 [2024-11-09 10:46:10,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660884374] [2024-11-09 10:46:10,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:10,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:46:10,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:10,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:46:10,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2024-11-09 10:46:11,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-09 10:46:11,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 218 flow. Second operand has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:11,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:11,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-09 10:46:11,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:11,492 INFO L124 PetriNetUnfolderBase]: 456/905 cut-off events. [2024-11-09 10:46:11,492 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:46:11,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 905 events. 456/905 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4496 event pairs, 169 based on Foata normal form. 0/767 useless extension candidates. Maximal degree in co-relation 1566. Up to 351 conditions per place. [2024-11-09 10:46:11,496 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 66 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-11-09 10:46:11,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 401 flow [2024-11-09 10:46:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-09 10:46:11,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-11-09 10:46:11,498 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 218 flow. Second operand 6 states and 211 transitions. [2024-11-09 10:46:11,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 401 flow [2024-11-09 10:46:11,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 396 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:46:11,499 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 238 flow [2024-11-09 10:46:11,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2024-11-09 10:46:11,500 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-09 10:46:11,500 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 238 flow [2024-11-09 10:46:11,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:11,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:11,501 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:11,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:46:11,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:11,705 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:11,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:11,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1837855077, now seen corresponding path program 1 times [2024-11-09 10:46:11,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:11,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493378583] [2024-11-09 10:46:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:11,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493378583] [2024-11-09 10:46:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493378583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837597246] [2024-11-09 10:46:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:12,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:12,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:12,280 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:12,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:46:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:12,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:46:12,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:12,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:12,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:46:12,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:46:12,519 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:12,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:12,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:12,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-09 10:46:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:12,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837597246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:12,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:12,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-09 10:46:12,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040119352] [2024-11-09 10:46:12,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:12,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:46:12,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:46:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:46:13,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-09 10:46:13,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 238 flow. Second operand has 26 states, 26 states have (on average 27.192307692307693) internal successors, (707), 26 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:13,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:13,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-09 10:46:13,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:14,350 INFO L124 PetriNetUnfolderBase]: 536/1136 cut-off events. [2024-11-09 10:46:14,351 INFO L125 PetriNetUnfolderBase]: For 194/194 co-relation queries the response was YES. [2024-11-09 10:46:14,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1136 events. 536/1136 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6232 event pairs, 169 based on Foata normal form. 52/1100 useless extension candidates. Maximal degree in co-relation 2239. Up to 377 conditions per place. [2024-11-09 10:46:14,356 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 69 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-11-09 10:46:14,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 500 flow [2024-11-09 10:46:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:46:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:46:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 465 transitions. [2024-11-09 10:46:14,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-09 10:46:14,358 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 238 flow. Second operand 15 states and 465 transitions. [2024-11-09 10:46:14,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 500 flow [2024-11-09 10:46:14,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 490 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:14,360 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 288 flow [2024-11-09 10:46:14,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=288, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-11-09 10:46:14,360 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 13 predicate places. [2024-11-09 10:46:14,360 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 288 flow [2024-11-09 10:46:14,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.192307692307693) internal successors, (707), 26 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:14,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:14,361 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:14,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:14,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:14,562 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:14,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1837855078, now seen corresponding path program 1 times [2024-11-09 10:46:14,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:14,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938745705] [2024-11-09 10:46:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 10:46:14,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938745705] [2024-11-09 10:46:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938745705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:14,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:46:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823028329] [2024-11-09 10:46:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:14,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:46:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:46:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:46:14,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-09 10:46:14,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:14,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:14,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-09 10:46:14,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:14,919 INFO L124 PetriNetUnfolderBase]: 603/1139 cut-off events. [2024-11-09 10:46:14,919 INFO L125 PetriNetUnfolderBase]: For 726/753 co-relation queries the response was YES. [2024-11-09 10:46:14,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1139 events. 603/1139 cut-off events. For 726/753 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5696 event pairs, 435 based on Foata normal form. 87/1147 useless extension candidates. Maximal degree in co-relation 2445. Up to 882 conditions per place. [2024-11-09 10:46:14,924 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 53 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2024-11-09 10:46:14,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 396 flow [2024-11-09 10:46:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:46:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:46:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-09 10:46:14,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-09 10:46:14,925 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 288 flow. Second operand 5 states and 147 transitions. [2024-11-09 10:46:14,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 396 flow [2024-11-09 10:46:14,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:46:14,931 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 289 flow [2024-11-09 10:46:14,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-11-09 10:46:14,932 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 14 predicate places. [2024-11-09 10:46:14,932 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 289 flow [2024-11-09 10:46:14,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:14,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:14,932 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:14,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:46:14,932 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:14,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991542, now seen corresponding path program 1 times [2024-11-09 10:46:14,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:14,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643693928] [2024-11-09 10:46:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:14,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643693928] [2024-11-09 10:46:15,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643693928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405971981] [2024-11-09 10:46:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:15,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:15,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:15,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:15,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:46:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:15,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 10:46:15,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:15,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:15,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:46:15,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:46:15,678 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 [2024-11-09 10:46:15,684 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:15,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:15,762 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:15,762 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 14 treesize of output 13 [2024-11-09 10:46:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:16,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:16,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405971981] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:16,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:16,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9] total 28 [2024-11-09 10:46:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629821851] [2024-11-09 10:46:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:16,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:46:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:46:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2024-11-09 10:46:16,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-09 10:46:16,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 289 flow. Second operand has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:16,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:16,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-09 10:46:16,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:17,015 INFO L124 PetriNetUnfolderBase]: 1090/2059 cut-off events. [2024-11-09 10:46:17,016 INFO L125 PetriNetUnfolderBase]: For 1354/1407 co-relation queries the response was YES. [2024-11-09 10:46:17,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 2059 events. 1090/2059 cut-off events. For 1354/1407 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12498 event pairs, 458 based on Foata normal form. 0/1792 useless extension candidates. Maximal degree in co-relation 4439. Up to 853 conditions per place. [2024-11-09 10:46:17,026 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 68 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-11-09 10:46:17,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 499 flow [2024-11-09 10:46:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-09 10:46:17,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-11-09 10:46:17,027 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 289 flow. Second operand 6 states and 209 transitions. [2024-11-09 10:46:17,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 499 flow [2024-11-09 10:46:17,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 494 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:46:17,029 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 309 flow [2024-11-09 10:46:17,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2024-11-09 10:46:17,030 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2024-11-09 10:46:17,030 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 309 flow [2024-11-09 10:46:17,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:17,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:17,031 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:17,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:17,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:17,231 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:17,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1826968716, now seen corresponding path program 1 times [2024-11-09 10:46:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627722935] [2024-11-09 10:46:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 10:46:17,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627722935] [2024-11-09 10:46:17,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627722935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:46:17,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:46:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:46:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990207285] [2024-11-09 10:46:17,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:17,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:46:17,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:46:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:46:17,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-09 10:46:17,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:17,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:17,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-09 10:46:17,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:17,494 INFO L124 PetriNetUnfolderBase]: 737/1514 cut-off events. [2024-11-09 10:46:17,495 INFO L125 PetriNetUnfolderBase]: For 1321/1388 co-relation queries the response was YES. [2024-11-09 10:46:17,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3623 conditions, 1514 events. 737/1514 cut-off events. For 1321/1388 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9096 event pairs, 590 based on Foata normal form. 44/1443 useless extension candidates. Maximal degree in co-relation 3491. Up to 1093 conditions per place. [2024-11-09 10:46:17,502 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 53 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-11-09 10:46:17,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 415 flow [2024-11-09 10:46:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:46:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:46:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-09 10:46:17,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-09 10:46:17,503 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 309 flow. Second operand 4 states and 127 transitions. [2024-11-09 10:46:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 415 flow [2024-11-09 10:46:17,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 407 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:17,505 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 301 flow [2024-11-09 10:46:17,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-11-09 10:46:17,506 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2024-11-09 10:46:17,506 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 301 flow [2024-11-09 10:46:17,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:17,506 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:17,506 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:17,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:46:17,506 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:17,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1826968717, now seen corresponding path program 1 times [2024-11-09 10:46:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349894846] [2024-11-09 10:46:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 10:46:17,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:17,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349894846] [2024-11-09 10:46:17,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349894846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:17,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358141720] [2024-11-09 10:46:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:17,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:17,698 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:17,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:46:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:17,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:46:17,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:17,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:46:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:17,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:18,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358141720] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:18,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:18,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 9] total 21 [2024-11-09 10:46:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296259445] [2024-11-09 10:46:18,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:18,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:46:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:46:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:46:18,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:18,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 30.3) internal successors, (303), 10 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) [2024-11-09 10:46:18,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:18,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:18,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:18,537 INFO L124 PetriNetUnfolderBase]: 939/1771 cut-off events. [2024-11-09 10:46:18,537 INFO L125 PetriNetUnfolderBase]: For 1394/1439 co-relation queries the response was YES. [2024-11-09 10:46:18,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 1771 events. 939/1771 cut-off events. For 1394/1439 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10282 event pairs, 458 based on Foata normal form. 65/1706 useless extension candidates. Maximal degree in co-relation 4242. Up to 918 conditions per place. [2024-11-09 10:46:18,551 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 69 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2024-11-09 10:46:18,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 512 flow [2024-11-09 10:46:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:46:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:46:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-11-09 10:46:18,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-09 10:46:18,552 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 301 flow. Second operand 5 states and 186 transitions. [2024-11-09 10:46:18,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 512 flow [2024-11-09 10:46:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 87 transitions, 509 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:46:18,556 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 317 flow [2024-11-09 10:46:18,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2024-11-09 10:46:18,558 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2024-11-09 10:46:18,558 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 317 flow [2024-11-09 10:46:18,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.3) internal successors, (303), 10 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) [2024-11-09 10:46:18,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:18,559 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:18,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:46:18,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 10:46:18,759 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:18,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:18,760 INFO L85 PathProgramCache]: Analyzing trace with hash -947140512, now seen corresponding path program 1 times [2024-11-09 10:46:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:18,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539876409] [2024-11-09 10:46:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:18,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:19,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539876409] [2024-11-09 10:46:19,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539876409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825781769] [2024-11-09 10:46:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:19,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:19,265 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:19,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:46:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:19,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 10:46:19,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:19,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:46:19,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:19,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:46:19,449 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 [2024-11-09 10:46:19,459 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:19,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:19,511 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:19,512 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 14 treesize of output 13 [2024-11-09 10:46:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:19,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:20,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825781769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:20,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:20,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2024-11-09 10:46:20,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621802471] [2024-11-09 10:46:20,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:20,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 10:46:20,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 10:46:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=755, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:46:21,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-09 10:46:21,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 317 flow. Second operand has 32 states, 32 states have (on average 23.1875) internal successors, (742), 32 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:21,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:21,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-09 10:46:21,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:22,211 INFO L124 PetriNetUnfolderBase]: 1733/3050 cut-off events. [2024-11-09 10:46:22,211 INFO L125 PetriNetUnfolderBase]: For 3889/4094 co-relation queries the response was YES. [2024-11-09 10:46:22,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8234 conditions, 3050 events. 1733/3050 cut-off events. For 3889/4094 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 17217 event pairs, 285 based on Foata normal form. 126/3103 useless extension candidates. Maximal degree in co-relation 8100. Up to 577 conditions per place. [2024-11-09 10:46:22,225 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 113 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-11-09 10:46:22,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 143 transitions, 825 flow [2024-11-09 10:46:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 394 transitions. [2024-11-09 10:46:22,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-11-09 10:46:22,227 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 317 flow. Second operand 13 states and 394 transitions. [2024-11-09 10:46:22,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 143 transitions, 825 flow [2024-11-09 10:46:22,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 143 transitions, 811 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:46:22,231 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 378 flow [2024-11-09 10:46:22,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=378, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-11-09 10:46:22,232 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2024-11-09 10:46:22,232 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 378 flow [2024-11-09 10:46:22,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 23.1875) internal successors, (742), 32 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:22,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:22,232 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:22,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:46:22,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:46:22,437 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:22,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash 761423058, now seen corresponding path program 1 times [2024-11-09 10:46:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584701886] [2024-11-09 10:46:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-09 10:46:22,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:22,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584701886] [2024-11-09 10:46:22,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584701886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:22,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318676630] [2024-11-09 10:46:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:22,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:22,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:22,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:46:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:22,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 10:46:22,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:22,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:46:22,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:22,881 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:22,881 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 14 treesize of output 13 [2024-11-09 10:46:22,896 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:22,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:23,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318676630] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:23,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:46:23,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 22 [2024-11-09 10:46:23,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817301884] [2024-11-09 10:46:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:46:23,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:46:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:46:23,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:46:23,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-09 10:46:23,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 378 flow. Second operand has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:23,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:23,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-09 10:46:23,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:24,117 INFO L124 PetriNetUnfolderBase]: 2508/4239 cut-off events. [2024-11-09 10:46:24,118 INFO L125 PetriNetUnfolderBase]: For 8209/8697 co-relation queries the response was YES. [2024-11-09 10:46:24,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11931 conditions, 4239 events. 2508/4239 cut-off events. For 8209/8697 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25794 event pairs, 1256 based on Foata normal form. 0/4038 useless extension candidates. Maximal degree in co-relation 11783. Up to 2119 conditions per place. [2024-11-09 10:46:24,140 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 70 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2024-11-09 10:46:24,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 90 transitions, 629 flow [2024-11-09 10:46:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:46:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:46:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2024-11-09 10:46:24,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-09 10:46:24,142 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 378 flow. Second operand 6 states and 207 transitions. [2024-11-09 10:46:24,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 90 transitions, 629 flow [2024-11-09 10:46:24,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 90 transitions, 605 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-09 10:46:24,146 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 389 flow [2024-11-09 10:46:24,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2024-11-09 10:46:24,147 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2024-11-09 10:46:24,147 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 389 flow [2024-11-09 10:46:24,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:24,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:24,147 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:24,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:46:24,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:46:24,348 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:24,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash -924656910, now seen corresponding path program 1 times [2024-11-09 10:46:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764744274] [2024-11-09 10:46:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:24,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:46:25,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:25,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764744274] [2024-11-09 10:46:25,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764744274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:25,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59337521] [2024-11-09 10:46:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:25,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:25,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:25,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:25,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:46:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:25,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 10:46:25,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:25,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:25,210 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 10:46:25,210 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 [2024-11-09 10:46:25,277 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-09 10:46:25,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-09 10:46:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:25,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59337521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:25,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:25,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2024-11-09 10:46:25,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242144576] [2024-11-09 10:46:25,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:25,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 10:46:25,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 10:46:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 10:46:26,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-09 10:46:26,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 389 flow. Second operand has 35 states, 35 states have (on average 21.4) internal successors, (749), 35 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:26,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:26,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-09 10:46:26,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:29,015 INFO L124 PetriNetUnfolderBase]: 10313/16270 cut-off events. [2024-11-09 10:46:29,015 INFO L125 PetriNetUnfolderBase]: For 26382/27629 co-relation queries the response was YES. [2024-11-09 10:46:29,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49009 conditions, 16270 events. 10313/16270 cut-off events. For 26382/27629 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 107907 event pairs, 1964 based on Foata normal form. 615/15703 useless extension candidates. Maximal degree in co-relation 48858. Up to 3342 conditions per place. [2024-11-09 10:46:29,100 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 128 selfloop transitions, 25 changer transitions 0/163 dead transitions. [2024-11-09 10:46:29,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 163 transitions, 1144 flow [2024-11-09 10:46:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:46:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:46:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 492 transitions. [2024-11-09 10:46:29,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2024-11-09 10:46:29,102 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 389 flow. Second operand 19 states and 492 transitions. [2024-11-09 10:46:29,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 163 transitions, 1144 flow [2024-11-09 10:46:29,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 163 transitions, 1128 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:46:29,115 INFO L231 Difference]: Finished difference. Result has 111 places, 77 transitions, 469 flow [2024-11-09 10:46:29,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=469, PETRI_PLACES=111, PETRI_TRANSITIONS=77} [2024-11-09 10:46:29,116 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 51 predicate places. [2024-11-09 10:46:29,116 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 77 transitions, 469 flow [2024-11-09 10:46:29,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 21.4) internal successors, (749), 35 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:29,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:29,116 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:29,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:46:29,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:46:29,321 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:29,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2129279182, now seen corresponding path program 1 times [2024-11-09 10:46:29,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:29,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442054692] [2024-11-09 10:46:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:29,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:29,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442054692] [2024-11-09 10:46:29,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442054692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:29,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028783620] [2024-11-09 10:46:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:29,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:29,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:29,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:29,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:46:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:29,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:46:29,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:29,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:29,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:46:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:30,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028783620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:30,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:30,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-09 10:46:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50648532] [2024-11-09 10:46:30,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:30,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 10:46:30,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 10:46:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:46:30,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:30,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 77 transitions, 469 flow. Second operand has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:30,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:30,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:30,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:31,774 INFO L124 PetriNetUnfolderBase]: 6002/11241 cut-off events. [2024-11-09 10:46:31,774 INFO L125 PetriNetUnfolderBase]: For 23900/25249 co-relation queries the response was YES. [2024-11-09 10:46:31,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33650 conditions, 11241 events. 6002/11241 cut-off events. For 23900/25249 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 90822 event pairs, 2903 based on Foata normal form. 644/11433 useless extension candidates. Maximal degree in co-relation 33478. Up to 4828 conditions per place. [2024-11-09 10:46:31,845 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 79 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2024-11-09 10:46:31,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 115 transitions, 913 flow [2024-11-09 10:46:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:46:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:46:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2024-11-09 10:46:31,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-11-09 10:46:31,847 INFO L175 Difference]: Start difference. First operand has 111 places, 77 transitions, 469 flow. Second operand 10 states and 362 transitions. [2024-11-09 10:46:31,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 115 transitions, 913 flow [2024-11-09 10:46:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 115 transitions, 880 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:46:31,869 INFO L231 Difference]: Finished difference. Result has 114 places, 79 transitions, 498 flow [2024-11-09 10:46:31,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=498, PETRI_PLACES=114, PETRI_TRANSITIONS=79} [2024-11-09 10:46:31,869 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 54 predicate places. [2024-11-09 10:46:31,869 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 79 transitions, 498 flow [2024-11-09 10:46:31,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:31,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:31,870 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:31,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:46:32,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:46:32,071 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:32,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1400407717, now seen corresponding path program 1 times [2024-11-09 10:46:32,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:32,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610585548] [2024-11-09 10:46:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:32,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 10:46:32,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:32,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610585548] [2024-11-09 10:46:32,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610585548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:32,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788269994] [2024-11-09 10:46:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:32,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:32,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:32,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:46:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:32,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:46:32,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:32,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:32,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:46:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:32,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788269994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:32,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:32,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2024-11-09 10:46:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791308801] [2024-11-09 10:46:32,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:32,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 10:46:32,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 10:46:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:46:33,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:33,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 79 transitions, 498 flow. Second operand has 25 states, 25 states have (on average 30.12) internal successors, (753), 25 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:33,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:33,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:33,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:34,770 INFO L124 PetriNetUnfolderBase]: 5994/11312 cut-off events. [2024-11-09 10:46:34,770 INFO L125 PetriNetUnfolderBase]: For 26080/26725 co-relation queries the response was YES. [2024-11-09 10:46:34,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36981 conditions, 11312 events. 5994/11312 cut-off events. For 26080/26725 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 89775 event pairs, 1561 based on Foata normal form. 633/11666 useless extension candidates. Maximal degree in co-relation 36804. Up to 2920 conditions per place. [2024-11-09 10:46:34,858 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 118 selfloop transitions, 21 changer transitions 0/156 dead transitions. [2024-11-09 10:46:34,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 156 transitions, 1199 flow [2024-11-09 10:46:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:46:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:46:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 453 transitions. [2024-11-09 10:46:34,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-11-09 10:46:34,860 INFO L175 Difference]: Start difference. First operand has 114 places, 79 transitions, 498 flow. Second operand 12 states and 453 transitions. [2024-11-09 10:46:34,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 156 transitions, 1199 flow [2024-11-09 10:46:34,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1164 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-09 10:46:34,894 INFO L231 Difference]: Finished difference. Result has 122 places, 80 transitions, 530 flow [2024-11-09 10:46:34,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=530, PETRI_PLACES=122, PETRI_TRANSITIONS=80} [2024-11-09 10:46:34,894 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-11-09 10:46:34,894 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 80 transitions, 530 flow [2024-11-09 10:46:34,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.12) internal successors, (753), 25 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:34,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:34,895 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:34,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:46:35,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:46:35,096 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:35,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1832891411, now seen corresponding path program 1 times [2024-11-09 10:46:35,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:35,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287453155] [2024-11-09 10:46:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:35,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-09 10:46:35,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:35,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287453155] [2024-11-09 10:46:35,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287453155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:35,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27714310] [2024-11-09 10:46:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:35,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:35,448 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:35,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:46:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:35,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 10:46:35,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:35,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:35,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:46:35,662 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:35,663 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 14 treesize of output 13 [2024-11-09 10:46:35,675 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:35,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:35,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27714310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:36,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:36,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-11-09 10:46:36,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60371931] [2024-11-09 10:46:36,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:36,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:46:36,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:46:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:46:37,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-09 10:46:37,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 80 transitions, 530 flow. Second operand has 26 states, 26 states have (on average 26.692307692307693) internal successors, (694), 26 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:37,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:37,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-09 10:46:37,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:39,466 INFO L124 PetriNetUnfolderBase]: 11973/20007 cut-off events. [2024-11-09 10:46:39,466 INFO L125 PetriNetUnfolderBase]: For 72176/74957 co-relation queries the response was YES. [2024-11-09 10:46:39,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69486 conditions, 20007 events. 11973/20007 cut-off events. For 72176/74957 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 152677 event pairs, 2903 based on Foata normal form. 966/20609 useless extension candidates. Maximal degree in co-relation 69305. Up to 4636 conditions per place. [2024-11-09 10:46:39,814 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 132 selfloop transitions, 13 changer transitions 0/160 dead transitions. [2024-11-09 10:46:39,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 160 transitions, 1410 flow [2024-11-09 10:46:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 409 transitions. [2024-11-09 10:46:39,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5243589743589744 [2024-11-09 10:46:39,816 INFO L175 Difference]: Start difference. First operand has 122 places, 80 transitions, 530 flow. Second operand 13 states and 409 transitions. [2024-11-09 10:46:39,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 160 transitions, 1410 flow [2024-11-09 10:46:39,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1328 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-09 10:46:39,872 INFO L231 Difference]: Finished difference. Result has 128 places, 82 transitions, 545 flow [2024-11-09 10:46:39,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=545, PETRI_PLACES=128, PETRI_TRANSITIONS=82} [2024-11-09 10:46:39,873 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2024-11-09 10:46:39,873 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 82 transitions, 545 flow [2024-11-09 10:46:39,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 26.692307692307693) internal successors, (694), 26 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:39,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:39,874 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:39,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:46:40,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:40,074 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:40,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash 322914747, now seen corresponding path program 1 times [2024-11-09 10:46:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:40,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366530900] [2024-11-09 10:46:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-09 10:46:40,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366530900] [2024-11-09 10:46:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366530900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872663136] [2024-11-09 10:46:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:40,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:40,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:40,487 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:40,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:46:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:40,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 10:46:40,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:40,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:40,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:46:40,726 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:46:40,726 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 14 treesize of output 13 [2024-11-09 10:46:40,737 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:40,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:41,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:41,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872663136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:41,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:41,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2024-11-09 10:46:41,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450339388] [2024-11-09 10:46:41,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:41,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 10:46:41,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 10:46:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2024-11-09 10:46:42,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-09 10:46:42,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 82 transitions, 545 flow. Second operand has 29 states, 29 states have (on average 27.0) internal successors, (783), 29 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:42,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:42,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-09 10:46:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:45,451 INFO L124 PetriNetUnfolderBase]: 10526/19154 cut-off events. [2024-11-09 10:46:45,451 INFO L125 PetriNetUnfolderBase]: For 73010/75489 co-relation queries the response was YES. [2024-11-09 10:46:45,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69162 conditions, 19154 events. 10526/19154 cut-off events. For 73010/75489 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 159201 event pairs, 2425 based on Foata normal form. 798/19588 useless extension candidates. Maximal degree in co-relation 68986. Up to 4089 conditions per place. [2024-11-09 10:46:45,576 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 168 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2024-11-09 10:46:45,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 1685 flow [2024-11-09 10:46:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:46:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:46:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 476 transitions. [2024-11-09 10:46:45,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-09 10:46:45,579 INFO L175 Difference]: Start difference. First operand has 128 places, 82 transitions, 545 flow. Second operand 14 states and 476 transitions. [2024-11-09 10:46:45,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 1685 flow [2024-11-09 10:46:45,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 199 transitions, 1611 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-11-09 10:46:45,648 INFO L231 Difference]: Finished difference. Result has 134 places, 84 transitions, 579 flow [2024-11-09 10:46:45,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=579, PETRI_PLACES=134, PETRI_TRANSITIONS=84} [2024-11-09 10:46:45,649 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2024-11-09 10:46:45,649 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 84 transitions, 579 flow [2024-11-09 10:46:45,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 27.0) internal successors, (783), 29 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:45,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:45,649 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:45,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:46:45,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:45,853 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:45,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1595369362, now seen corresponding path program 1 times [2024-11-09 10:46:45,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:45,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030814848] [2024-11-09 10:46:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:45,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:46,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:46,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030814848] [2024-11-09 10:46:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030814848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007616108] [2024-11-09 10:46:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:46,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:46,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:46,186 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:46,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:46:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:46,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:46:46,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:46,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:46,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-09 10:46:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:46,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007616108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:46,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:46,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-09 10:46:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518261927] [2024-11-09 10:46:46,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:46,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 10:46:46,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 10:46:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:46:47,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-09 10:46:47,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 84 transitions, 579 flow. Second operand has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:47,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:47,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-09 10:46:47,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:46:51,216 INFO L124 PetriNetUnfolderBase]: 12877/23928 cut-off events. [2024-11-09 10:46:51,216 INFO L125 PetriNetUnfolderBase]: For 93027/95778 co-relation queries the response was YES. [2024-11-09 10:46:51,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87584 conditions, 23928 events. 12877/23928 cut-off events. For 93027/95778 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 206637 event pairs, 3459 based on Foata normal form. 1146/24508 useless extension candidates. Maximal degree in co-relation 87405. Up to 6008 conditions per place. [2024-11-09 10:46:51,383 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 151 selfloop transitions, 22 changer transitions 0/191 dead transitions. [2024-11-09 10:46:51,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 191 transitions, 1793 flow [2024-11-09 10:46:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 10:46:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 10:46:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2024-11-09 10:46:51,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-11-09 10:46:51,385 INFO L175 Difference]: Start difference. First operand has 134 places, 84 transitions, 579 flow. Second operand 13 states and 486 transitions. [2024-11-09 10:46:51,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 191 transitions, 1793 flow [2024-11-09 10:46:51,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 191 transitions, 1744 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-09 10:46:51,510 INFO L231 Difference]: Finished difference. Result has 139 places, 86 transitions, 636 flow [2024-11-09 10:46:51,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=636, PETRI_PLACES=139, PETRI_TRANSITIONS=86} [2024-11-09 10:46:51,511 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2024-11-09 10:46:51,511 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 86 transitions, 636 flow [2024-11-09 10:46:51,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:51,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:51,511 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:46:51,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 10:46:51,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:51,712 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:46:51,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 570749139, now seen corresponding path program 2 times [2024-11-09 10:46:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:51,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192076119] [2024-11-09 10:46:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:46:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 10:46:52,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:46:52,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192076119] [2024-11-09 10:46:52,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192076119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:46:52,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080756105] [2024-11-09 10:46:52,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:46:52,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:46:52,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:46:52,183 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:46:52,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:46:52,318 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:46:52,318 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:46:52,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 10:46:52,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:46:52,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:52,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:46:52,373 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 10:46:52,374 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 [2024-11-09 10:46:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:46:52,538 INFO L349 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2024-11-09 10:46:52,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2024-11-09 10:46:52,545 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:46:52,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:46:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 10:46:53,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:46:53,574 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 10 treesize of output 8 [2024-11-09 10:46:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:46:53,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080756105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:46:53,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:46:53,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 13] total 41 [2024-11-09 10:46:53,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752413831] [2024-11-09 10:46:53,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:46:53,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 10:46:53,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:46:53,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 10:46:53,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1428, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 10:46:55,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-09 10:46:55,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 86 transitions, 636 flow. Second operand has 43 states, 43 states have (on average 23.11627906976744) internal successors, (994), 43 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:46:55,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:46:55,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-09 10:46:55,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:02,247 INFO L124 PetriNetUnfolderBase]: 25007/39572 cut-off events. [2024-11-09 10:47:02,248 INFO L125 PetriNetUnfolderBase]: For 182527/186319 co-relation queries the response was YES. [2024-11-09 10:47:02,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156700 conditions, 39572 events. 25007/39572 cut-off events. For 182527/186319 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 302360 event pairs, 4182 based on Foata normal form. 450/39783 useless extension candidates. Maximal degree in co-relation 156508. Up to 7040 conditions per place. [2024-11-09 10:47:02,699 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 215 selfloop transitions, 25 changer transitions 0/252 dead transitions. [2024-11-09 10:47:02,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 252 transitions, 2326 flow [2024-11-09 10:47:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:47:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:47:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 584 transitions. [2024-11-09 10:47:02,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-11-09 10:47:02,701 INFO L175 Difference]: Start difference. First operand has 139 places, 86 transitions, 636 flow. Second operand 20 states and 584 transitions. [2024-11-09 10:47:02,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 252 transitions, 2326 flow [2024-11-09 10:47:03,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 252 transitions, 2253 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-09 10:47:03,018 INFO L231 Difference]: Finished difference. Result has 151 places, 87 transitions, 669 flow [2024-11-09 10:47:03,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=669, PETRI_PLACES=151, PETRI_TRANSITIONS=87} [2024-11-09 10:47:03,019 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 91 predicate places. [2024-11-09 10:47:03,019 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 87 transitions, 669 flow [2024-11-09 10:47:03,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 23.11627906976744) internal successors, (994), 43 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:03,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:03,020 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2024-11-09 10:47:03,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:03,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:03,224 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:47:03,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1621299218, now seen corresponding path program 1 times [2024-11-09 10:47:03,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:03,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776203013] [2024-11-09 10:47:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:03,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-09 10:47:03,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:03,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776203013] [2024-11-09 10:47:03,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776203013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:03,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:03,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:47:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539523802] [2024-11-09 10:47:03,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:03,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:03,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-09 10:47:03,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 87 transitions, 669 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:03,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:03,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-09 10:47:03,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:06,164 INFO L124 PetriNetUnfolderBase]: 12000/19498 cut-off events. [2024-11-09 10:47:06,165 INFO L125 PetriNetUnfolderBase]: For 99492/102314 co-relation queries the response was YES. [2024-11-09 10:47:06,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79437 conditions, 19498 events. 12000/19498 cut-off events. For 99492/102314 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 143309 event pairs, 9122 based on Foata normal form. 30/18205 useless extension candidates. Maximal degree in co-relation 79241. Up to 14912 conditions per place. [2024-11-09 10:47:06,362 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 88 selfloop transitions, 2 changer transitions 1/111 dead transitions. [2024-11-09 10:47:06,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 111 transitions, 1023 flow [2024-11-09 10:47:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-11-09 10:47:06,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7388888888888889 [2024-11-09 10:47:06,363 INFO L175 Difference]: Start difference. First operand has 151 places, 87 transitions, 669 flow. Second operand 3 states and 133 transitions. [2024-11-09 10:47:06,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 111 transitions, 1023 flow [2024-11-09 10:47:06,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 111 transitions, 975 flow, removed 1 selfloop flow, removed 18 redundant places. [2024-11-09 10:47:06,541 INFO L231 Difference]: Finished difference. Result has 136 places, 87 transitions, 629 flow [2024-11-09 10:47:06,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=629, PETRI_PLACES=136, PETRI_TRANSITIONS=87} [2024-11-09 10:47:06,542 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2024-11-09 10:47:06,542 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 87 transitions, 629 flow [2024-11-09 10:47:06,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:06,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:06,542 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:06,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-09 10:47:06,543 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:47:06,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash -139600374, now seen corresponding path program 2 times [2024-11-09 10:47:06,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:06,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200210903] [2024-11-09 10:47:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:06,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 10:47:07,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200210903] [2024-11-09 10:47:07,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200210903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992664369] [2024-11-09 10:47:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:07,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:07,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:07,646 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:07,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:47:07,855 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:47:07,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:07,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 10:47:07,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:07,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:47:07,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:47:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:47:07,934 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 [2024-11-09 10:47:07,946 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:47:07,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 10:47:08,011 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:47:08,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:47:08,016 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 [2024-11-09 10:47:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:08,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:09,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992664369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:09,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:09,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 41 [2024-11-09 10:47:09,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335517128] [2024-11-09 10:47:09,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:09,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 10:47:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 10:47:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1484, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 10:47:11,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-11-09 10:47:11,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 87 transitions, 629 flow. Second operand has 43 states, 43 states have (on average 20.232558139534884) internal successors, (870), 43 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:11,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:11,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-11-09 10:47:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:19,047 INFO L124 PetriNetUnfolderBase]: 29847/48281 cut-off events. [2024-11-09 10:47:19,047 INFO L125 PetriNetUnfolderBase]: For 222411/225303 co-relation queries the response was YES. [2024-11-09 10:47:19,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193494 conditions, 48281 events. 29847/48281 cut-off events. For 222411/225303 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 385471 event pairs, 5079 based on Foata normal form. 610/48492 useless extension candidates. Maximal degree in co-relation 193314. Up to 8608 conditions per place. [2024-11-09 10:47:19,704 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 223 selfloop transitions, 20 changer transitions 0/255 dead transitions. [2024-11-09 10:47:19,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 255 transitions, 2513 flow [2024-11-09 10:47:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:47:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:47:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 415 transitions. [2024-11-09 10:47:19,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-11-09 10:47:19,705 INFO L175 Difference]: Start difference. First operand has 136 places, 87 transitions, 629 flow. Second operand 15 states and 415 transitions. [2024-11-09 10:47:19,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 255 transitions, 2513 flow [2024-11-09 10:47:20,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 255 transitions, 2485 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:20,147 INFO L231 Difference]: Finished difference. Result has 150 places, 89 transitions, 698 flow [2024-11-09 10:47:20,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=698, PETRI_PLACES=150, PETRI_TRANSITIONS=89} [2024-11-09 10:47:20,147 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2024-11-09 10:47:20,147 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 89 transitions, 698 flow [2024-11-09 10:47:20,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 20.232558139534884) internal successors, (870), 43 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:20,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:20,148 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:20,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 10:47:20,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:20,348 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-09 10:47:20,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash -32643443, now seen corresponding path program 2 times [2024-11-09 10:47:20,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:20,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774399311] [2024-11-09 10:47:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 10:47:20,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:20,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774399311] [2024-11-09 10:47:20,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774399311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:20,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67551481] [2024-11-09 10:47:20,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:20,751 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:20,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:47:20,872 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:47:20,872 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:20,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 10:47:20,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:20,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:47:20,919 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 10:47:20,920 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 [2024-11-09 10:47:20,993 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-09 10:47:20,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-09 10:47:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 10:47:21,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 10:47:22,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67551481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:22,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:22,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 23 [2024-11-09 10:47:22,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795702766] [2024-11-09 10:47:22,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:22,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 10:47:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 10:47:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-11-09 10:47:23,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-09 10:47:23,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 89 transitions, 698 flow. Second operand has 24 states, 24 states have (on average 26.833333333333332) internal successors, (644), 24 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:23,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:23,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-09 10:47:23,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand