./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 3289d67d 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-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:31:52,251 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:31:52,306 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:31:52,310 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:31:52,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:31:52,339 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:31:52,340 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:31:52,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:31:52,341 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:31:52,341 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:31:52,341 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:31:52,342 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:31:52,342 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:31:52,343 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:31:52,343 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:31:52,343 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:31:52,344 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:31:52,344 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:31:52,344 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:31:52,345 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:31:52,347 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:31:52,349 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:31:52,349 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:31:52,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:31:52,350 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:31:52,350 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:31:52,350 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:31:52,350 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:31:52,350 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:31:52,351 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:31:52,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:31:52,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:31:52,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:31:52,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:52,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:31:52,352 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:31:52,353 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:31:52,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:31:52,354 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:31:52,354 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:31:52,354 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:31:52,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:31:52,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-17 03:31:52,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:31:52,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:31:52,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:31:52,603 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:31:52,603 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:31:52,604 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-17 03:31:54,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:31:54,269 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:31:54,270 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-17 03:31:54,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc0160fb6/405bd0f63fc94978b649ecc6d2cd4160/FLAG04aea306c [2024-11-17 03:31:54,290 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc0160fb6/405bd0f63fc94978b649ecc6d2cd4160 [2024-11-17 03:31:54,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:31:54,294 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:31:54,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:54,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:31:54,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:31:54,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39daa75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54, skipping insertion in model container [2024-11-17 03:31:54,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:31:54,564 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:31:54,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:54,591 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:31:54,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:54,656 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:31:54,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54 WrapperNode [2024-11-17 03:31:54,656 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:54,657 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:54,657 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:31:54,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:31:54,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,712 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 267 [2024-11-17 03:31:54,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:54,716 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:31:54,716 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:31:54,716 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:31:54,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,746 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,772 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]. [2024-11-17 03:31:54,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,789 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:31:54,824 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:31:54,824 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:31:54,824 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:31:54,825 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (1/1) ... [2024-11-17 03:31:54,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:54,870 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) [2024-11-17 03:31:54,880 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 [2024-11-17 03:31:54,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:31:54,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:31:54,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:31:54,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:31:54,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:31:54,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:31:54,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:31:54,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:31:54,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:31:54,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:31:54,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:31:54,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:31:54,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:31:54,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:31:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:31:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:31:54,928 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:31:55,066 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:31:55,068 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:31:55,518 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:31:55,519 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:31:55,927 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:31:55,927 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:31:55,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:31:55 BoogieIcfgContainer [2024-11-17 03:31:55,928 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:31:55,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:31:55,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:31:55,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:31:55,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:31:54" (1/3) ... [2024-11-17 03:31:55,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7063479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:55, skipping insertion in model container [2024-11-17 03:31:55,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:54" (2/3) ... [2024-11-17 03:31:55,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7063479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:55, skipping insertion in model container [2024-11-17 03:31:55,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:31:55" (3/3) ... [2024-11-17 03:31:55,939 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-17 03:31:55,956 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:31:55,957 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-17 03:31:55,957 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:31:56,027 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:31:56,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 78 transitions, 177 flow [2024-11-17 03:31:56,103 INFO L124 PetriNetUnfolderBase]: 12/75 cut-off events. [2024-11-17 03:31:56,103 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:31:56,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 75 events. 12/75 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 175 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2024-11-17 03:31:56,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 78 transitions, 177 flow [2024-11-17 03:31:56,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 166 flow [2024-11-17 03:31:56,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:31:56,129 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;@2423cd45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:31:56,130 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-17 03:31:56,135 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:31:56,135 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:31:56,135 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:31:56,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:56,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:31:56,137 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:31:56,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash 24935720, now seen corresponding path program 1 times [2024-11-17 03:31:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:56,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073220187] [2024-11-17 03:31:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:56,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:56,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:56,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073220187] [2024-11-17 03:31:56,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073220187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:56,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:56,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:31:56,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073000385] [2024-11-17 03:31:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:56,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:31:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:56,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:31:56,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:31:56,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-17 03:31:56,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:56,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:56,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-17 03:31:56,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:56,772 INFO L124 PetriNetUnfolderBase]: 202/439 cut-off events. [2024-11-17 03:31:56,773 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-17 03:31:56,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 439 events. 202/439 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2077 event pairs, 124 based on Foata normal form. 79/401 useless extension candidates. Maximal degree in co-relation 662. Up to 293 conditions per place. [2024-11-17 03:31:56,781 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 27 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-17 03:31:56,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 202 flow [2024-11-17 03:31:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:31:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:31:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-11-17 03:31:56,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-11-17 03:31:56,800 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 166 flow. Second operand 3 states and 153 transitions. [2024-11-17 03:31:56,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 202 flow [2024-11-17 03:31:56,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 190 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:56,808 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-11-17 03:31:56,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-17 03:31:56,818 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-17 03:31:56,819 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-11-17 03:31:56,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:56,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:56,819 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:31:56,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:31:56,820 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:31:56,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash 24935721, now seen corresponding path program 1 times [2024-11-17 03:31:56,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:56,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962023108] [2024-11-17 03:31:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:56,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:57,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:57,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962023108] [2024-11-17 03:31:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962023108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:57,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:57,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:31:57,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486008941] [2024-11-17 03:31:57,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:57,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:31:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:31:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:31:57,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-17 03:31:57,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:57,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:57,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-17 03:31:57,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:57,299 INFO L124 PetriNetUnfolderBase]: 205/454 cut-off events. [2024-11-17 03:31:57,300 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:31:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 454 events. 205/454 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2129 event pairs, 124 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 724. Up to 306 conditions per place. [2024-11-17 03:31:57,305 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 34 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-17 03:31:57,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 238 flow [2024-11-17 03:31:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:31:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:31:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2024-11-17 03:31:57,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2024-11-17 03:31:57,309 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 3 states and 158 transitions. [2024-11-17 03:31:57,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 238 flow [2024-11-17 03:31:57,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:57,312 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 190 flow [2024-11-17 03:31:57,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2024-11-17 03:31:57,315 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2024-11-17 03:31:57,315 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 190 flow [2024-11-17 03:31:57,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:57,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:57,316 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:31:57,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:31:57,316 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:31:57,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash -168502677, now seen corresponding path program 1 times [2024-11-17 03:31:57,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:57,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290570956] [2024-11-17 03:31:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:57,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290570956] [2024-11-17 03:31:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290570956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508369499] [2024-11-17 03:31:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:57,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:57,502 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) [2024-11-17 03:31:57,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:31:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:31:57,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:57,643 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 [2024-11-17 03:31:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:57,718 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508369499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:57,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:31:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035910146] [2024-11-17 03:31:57,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:57,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:31:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:31:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:31:58,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-17 03:31:58,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 190 flow. Second operand has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:58,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:58,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-17 03:31:58,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:58,395 INFO L124 PetriNetUnfolderBase]: 214/499 cut-off events. [2024-11-17 03:31:58,396 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-17 03:31:58,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 499 events. 214/499 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2435 event pairs, 124 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 724. Up to 309 conditions per place. [2024-11-17 03:31:58,401 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 43 selfloop transitions, 25 changer transitions 0/99 dead transitions. [2024-11-17 03:31:58,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 434 flow [2024-11-17 03:31:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2024-11-17 03:31:58,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6517094017094017 [2024-11-17 03:31:58,406 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 190 flow. Second operand 6 states and 305 transitions. [2024-11-17 03:31:58,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 434 flow [2024-11-17 03:31:58,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:58,411 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 351 flow [2024-11-17 03:31:58,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2024-11-17 03:31:58,412 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-17 03:31:58,412 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 351 flow [2024-11-17 03:31:58,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:58,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:58,413 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:58,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:31:58,617 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 [2024-11-17 03:31:58,619 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:31:58,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash 279974819, now seen corresponding path program 1 times [2024-11-17 03:31:58,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:58,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612831493] [2024-11-17 03:31:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:58,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612831493] [2024-11-17 03:31:58,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612831493] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:58,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:58,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:31:58,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381669749] [2024-11-17 03:31:58,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:58,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:31:58,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:31:58,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:31:58,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-17 03:31:58,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:58,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:58,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-17 03:31:58,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:58,813 INFO L124 PetriNetUnfolderBase]: 211/493 cut-off events. [2024-11-17 03:31:58,813 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-17 03:31:58,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 493 events. 211/493 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2239 event pairs, 124 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 824. Up to 335 conditions per place. [2024-11-17 03:31:58,818 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 44 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2024-11-17 03:31:58,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 455 flow [2024-11-17 03:31:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:31:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:31:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-17 03:31:58,819 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-11-17 03:31:58,819 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 351 flow. Second operand 3 states and 155 transitions. [2024-11-17 03:31:58,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 455 flow [2024-11-17 03:31:58,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 417 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:58,824 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 341 flow [2024-11-17 03:31:58,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=341, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2024-11-17 03:31:58,825 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-17 03:31:58,825 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 341 flow [2024-11-17 03:31:58,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:58,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:58,826 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-17 03:31:58,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:31:58,826 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:31:58,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:58,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1976217257, now seen corresponding path program 2 times [2024-11-17 03:31:58,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:58,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598340749] [2024-11-17 03:31:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:58,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598340749] [2024-11-17 03:31:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598340749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445688608] [2024-11-17 03:31:59,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:31:59,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:59,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:59,120 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) [2024-11-17 03:31:59,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:31:59,200 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:31:59,200 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:59,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-17 03:31:59,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:59,232 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 [2024-11-17 03:31:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:59,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:59,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445688608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:59,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:59,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-17 03:31:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836538208] [2024-11-17 03:31:59,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:59,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:31:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:31:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:32:00,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-17 03:32:00,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 341 flow. Second operand has 20 states, 20 states have (on average 36.65) internal successors, (733), 20 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:00,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:00,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-17 03:32:00,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:01,317 INFO L124 PetriNetUnfolderBase]: 214/502 cut-off events. [2024-11-17 03:32:01,317 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-17 03:32:01,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 502 events. 214/502 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2301 event pairs, 124 based on Foata normal form. 3/388 useless extension candidates. Maximal degree in co-relation 831. Up to 297 conditions per place. [2024-11-17 03:32:01,321 INFO L140 encePairwiseOnDemand]: 62/78 looper letters, 37 selfloop transitions, 46 changer transitions 0/111 dead transitions. [2024-11-17 03:32:01,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 575 flow [2024-11-17 03:32:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:32:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:32:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 506 transitions. [2024-11-17 03:32:01,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5405982905982906 [2024-11-17 03:32:01,324 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 341 flow. Second operand 12 states and 506 transitions. [2024-11-17 03:32:01,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 575 flow [2024-11-17 03:32:01,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 500 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-17 03:32:01,330 INFO L231 Difference]: Finished difference. Result has 77 places, 102 transitions, 450 flow [2024-11-17 03:32:01,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=450, PETRI_PLACES=77, PETRI_TRANSITIONS=102} [2024-11-17 03:32:01,333 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2024-11-17 03:32:01,333 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 102 transitions, 450 flow [2024-11-17 03:32:01,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.65) internal successors, (733), 20 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:01,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:01,334 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:01,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:32:01,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:01,535 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:01,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1048693080, now seen corresponding path program 1 times [2024-11-17 03:32:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037603830] [2024-11-17 03:32:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:01,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:01,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:01,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037603830] [2024-11-17 03:32:01,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037603830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:01,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360553557] [2024-11-17 03:32:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:01,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:01,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:01,647 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) [2024-11-17 03:32:01,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:32:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:01,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:32:01,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:01,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:01,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360553557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:01,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:01,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-17 03:32:01,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726179424] [2024-11-17 03:32:01,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:01,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:32:01,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:32:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:32:01,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-17 03:32:01,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 40.875) internal successors, (327), 8 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:01,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:01,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-17 03:32:01,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:02,016 INFO L124 PetriNetUnfolderBase]: 205/484 cut-off events. [2024-11-17 03:32:02,016 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-11-17 03:32:02,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 484 events. 205/484 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2089 event pairs, 124 based on Foata normal form. 9/376 useless extension candidates. Maximal degree in co-relation 742. Up to 306 conditions per place. [2024-11-17 03:32:02,019 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 39 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-11-17 03:32:02,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 520 flow [2024-11-17 03:32:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 290 transitions. [2024-11-17 03:32:02,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-11-17 03:32:02,020 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 450 flow. Second operand 6 states and 290 transitions. [2024-11-17 03:32:02,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 520 flow [2024-11-17 03:32:02,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 453 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-17 03:32:02,024 INFO L231 Difference]: Finished difference. Result has 72 places, 84 transitions, 321 flow [2024-11-17 03:32:02,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=72, PETRI_TRANSITIONS=84} [2024-11-17 03:32:02,025 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2024-11-17 03:32:02,026 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 84 transitions, 321 flow [2024-11-17 03:32:02,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.875) internal successors, (327), 8 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:02,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:02,027 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:02,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:32:02,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:02,228 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:02,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1436566371, now seen corresponding path program 2 times [2024-11-17 03:32:02,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:02,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513865949] [2024-11-17 03:32:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:02,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-17 03:32:02,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:02,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513865949] [2024-11-17 03:32:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513865949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:02,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255536126] [2024-11-17 03:32:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:02,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:02,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:02,398 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) [2024-11-17 03:32:02,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:32:02,488 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:32:02,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:02,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:32:02,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:02,494 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 [2024-11-17 03:32:02,538 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-17 03:32:02,539 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 [2024-11-17 03:32:02,662 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-17 03:32:02,663 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 [2024-11-17 03:32:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-17 03:32:02,758 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:32:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255536126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:02,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:32:02,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-11-17 03:32:02,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008652493] [2024-11-17 03:32:02,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:02,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:02,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:02,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:32:02,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-17 03:32:02,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 84 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:02,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:02,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-17 03:32:02,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:02,974 INFO L124 PetriNetUnfolderBase]: 346/740 cut-off events. [2024-11-17 03:32:02,974 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-17 03:32:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 740 events. 346/740 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3788 event pairs, 234 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1205. Up to 495 conditions per place. [2024-11-17 03:32:02,978 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 47 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2024-11-17 03:32:02,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 82 transitions, 421 flow [2024-11-17 03:32:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:32:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:32:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 203 transitions. [2024-11-17 03:32:02,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205128205128206 [2024-11-17 03:32:02,980 INFO L175 Difference]: Start difference. First operand has 72 places, 84 transitions, 321 flow. Second operand 5 states and 203 transitions. [2024-11-17 03:32:02,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 82 transitions, 421 flow [2024-11-17 03:32:02,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 369 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:32:02,982 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 275 flow [2024-11-17 03:32:02,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-11-17 03:32:02,986 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2024-11-17 03:32:02,986 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 275 flow [2024-11-17 03:32:02,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:02,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:02,986 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:03,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:03,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:03,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:03,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1436566372, now seen corresponding path program 1 times [2024-11-17 03:32:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:03,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433765352] [2024-11-17 03:32:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-17 03:32:03,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:03,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433765352] [2024-11-17 03:32:03,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433765352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:03,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611887679] [2024-11-17 03:32:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:03,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:03,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:03,356 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) [2024-11-17 03:32:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:32:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:03,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:32:03,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-17 03:32:03,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-17 03:32:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611887679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:03,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-17 03:32:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652769293] [2024-11-17 03:32:03,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:03,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:32:03,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:32:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:32:03,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-17 03:32:03,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 275 flow. Second operand has 12 states, 12 states have (on average 40.583333333333336) internal successors, (487), 12 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:03,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:03,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-17 03:32:03,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:03,874 INFO L124 PetriNetUnfolderBase]: 202/474 cut-off events. [2024-11-17 03:32:03,874 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-17 03:32:03,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 474 events. 202/474 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2004 event pairs, 124 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 735. Up to 302 conditions per place. [2024-11-17 03:32:03,878 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 38 selfloop transitions, 24 changer transitions 0/88 dead transitions. [2024-11-17 03:32:03,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 438 flow [2024-11-17 03:32:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:32:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:32:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 369 transitions. [2024-11-17 03:32:03,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-11-17 03:32:03,879 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 275 flow. Second operand 8 states and 369 transitions. [2024-11-17 03:32:03,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 438 flow [2024-11-17 03:32:03,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 88 transitions, 433 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:03,881 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 303 flow [2024-11-17 03:32:03,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-11-17 03:32:03,883 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-17 03:32:03,884 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 303 flow [2024-11-17 03:32:03,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 40.583333333333336) internal successors, (487), 12 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:03,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:03,885 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:03,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:32:04,085 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 [2024-11-17 03:32:04,086 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:04,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash -764343063, now seen corresponding path program 2 times [2024-11-17 03:32:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:04,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087514280] [2024-11-17 03:32:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:04,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-17 03:32:05,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:05,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087514280] [2024-11-17 03:32:05,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087514280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:05,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940297432] [2024-11-17 03:32:05,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:05,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:05,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:05,141 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) [2024-11-17 03:32:05,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:32:05,267 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:32:05,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:05,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:32:05,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:05,280 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 [2024-11-17 03:32:05,284 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 [2024-11-17 03:32:05,423 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 03:32:05,424 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 [2024-11-17 03:32:05,431 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 [2024-11-17 03:32:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:05,563 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 [2024-11-17 03:32:05,574 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:05,574 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 [2024-11-17 03:32:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-17 03:32:05,688 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:32:05,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940297432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:05,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:32:05,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 18 [2024-11-17 03:32:05,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499728148] [2024-11-17 03:32:05,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:05,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:32:05,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:32:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:32:05,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-17 03:32:05,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 35.166666666666664) internal successors, (211), 6 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:05,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:05,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-17 03:32:05,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:06,103 INFO L124 PetriNetUnfolderBase]: 682/1405 cut-off events. [2024-11-17 03:32:06,103 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-17 03:32:06,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2564 conditions, 1405 events. 682/1405 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8346 event pairs, 252 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 2390. Up to 606 conditions per place. [2024-11-17 03:32:06,111 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 67 selfloop transitions, 5 changer transitions 0/98 dead transitions. [2024-11-17 03:32:06,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 490 flow [2024-11-17 03:32:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 250 transitions. [2024-11-17 03:32:06,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-11-17 03:32:06,113 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 303 flow. Second operand 6 states and 250 transitions. [2024-11-17 03:32:06,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 490 flow [2024-11-17 03:32:06,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 454 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:32:06,116 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 285 flow [2024-11-17 03:32:06,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-11-17 03:32:06,117 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-17 03:32:06,118 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 285 flow [2024-11-17 03:32:06,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.166666666666664) internal successors, (211), 6 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:06,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:06,118 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:06,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:32:06,318 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 [2024-11-17 03:32:06,319 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:06,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2075169561, now seen corresponding path program 1 times [2024-11-17 03:32:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:06,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819128614] [2024-11-17 03:32:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-17 03:32:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819128614] [2024-11-17 03:32:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819128614] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:32:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288867579] [2024-11-17 03:32:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:06,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:06,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-17 03:32:06,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:06,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:06,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-17 03:32:06,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:06,654 INFO L124 PetriNetUnfolderBase]: 430/857 cut-off events. [2024-11-17 03:32:06,654 INFO L125 PetriNetUnfolderBase]: For 205/232 co-relation queries the response was YES. [2024-11-17 03:32:06,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 857 events. 430/857 cut-off events. For 205/232 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4355 event pairs, 299 based on Foata normal form. 56/760 useless extension candidates. Maximal degree in co-relation 1588. Up to 624 conditions per place. [2024-11-17 03:32:06,659 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 49 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-17 03:32:06,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 385 flow [2024-11-17 03:32:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:32:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:32:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-11-17 03:32:06,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-11-17 03:32:06,661 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 285 flow. Second operand 5 states and 207 transitions. [2024-11-17 03:32:06,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 385 flow [2024-11-17 03:32:06,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 78 transitions, 377 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:06,663 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 279 flow [2024-11-17 03:32:06,663 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-11-17 03:32:06,663 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2024-11-17 03:32:06,664 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 279 flow [2024-11-17 03:32:06,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:06,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:06,664 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:06,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:32:06,664 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:06,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:06,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2075169562, now seen corresponding path program 1 times [2024-11-17 03:32:06,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:06,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361233608] [2024-11-17 03:32:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:06,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:07,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:07,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361233608] [2024-11-17 03:32:07,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361233608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:07,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995946862] [2024-11-17 03:32:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:07,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:07,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:07,242 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) [2024-11-17 03:32:07,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:32:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:07,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-17 03:32:07,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:07,387 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 [2024-11-17 03:32:07,393 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 [2024-11-17 03:32:07,507 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:07,508 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 [2024-11-17 03:32:07,526 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:07,527 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 [2024-11-17 03:32:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:07,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:08,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995946862] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:08,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:08,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 25 [2024-11-17 03:32:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865373901] [2024-11-17 03:32:08,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:08,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:32:08,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:32:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-17 03:32:08,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 78 [2024-11-17 03:32:08,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 279 flow. Second operand has 10 states, 10 states have (on average 42.1) internal successors, (421), 10 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:08,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:08,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 78 [2024-11-17 03:32:08,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:09,192 INFO L124 PetriNetUnfolderBase]: 400/875 cut-off events. [2024-11-17 03:32:09,192 INFO L125 PetriNetUnfolderBase]: For 129/137 co-relation queries the response was YES. [2024-11-17 03:32:09,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 875 events. 400/875 cut-off events. For 129/137 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4491 event pairs, 143 based on Foata normal form. 26/723 useless extension candidates. Maximal degree in co-relation 1524. Up to 377 conditions per place. [2024-11-17 03:32:09,196 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 63 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2024-11-17 03:32:09,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 452 flow [2024-11-17 03:32:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 288 transitions. [2024-11-17 03:32:09,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-17 03:32:09,198 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 279 flow. Second operand 6 states and 288 transitions. [2024-11-17 03:32:09,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 452 flow [2024-11-17 03:32:09,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 447 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:09,200 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 288 flow [2024-11-17 03:32:09,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-17 03:32:09,201 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-17 03:32:09,201 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 288 flow [2024-11-17 03:32:09,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 42.1) internal successors, (421), 10 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:09,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:09,202 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:09,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:32:09,405 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 [2024-11-17 03:32:09,406 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:09,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1688927733, now seen corresponding path program 1 times [2024-11-17 03:32:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:09,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742962972] [2024-11-17 03:32:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:09,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:10,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742962972] [2024-11-17 03:32:10,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742962972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355142681] [2024-11-17 03:32:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:10,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:10,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:10,017 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) [2024-11-17 03:32:10,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:32:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:10,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-17 03:32:10,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:10,175 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 [2024-11-17 03:32:10,185 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 [2024-11-17 03:32:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:10,293 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 [2024-11-17 03:32:10,299 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:10,300 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 [2024-11-17 03:32:10,386 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:10,386 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 [2024-11-17 03:32:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:10,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:11,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355142681] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:11,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:11,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 27 [2024-11-17 03:32:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624439781] [2024-11-17 03:32:11,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:11,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:32:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:32:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2024-11-17 03:32:11,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 78 [2024-11-17 03:32:11,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 288 flow. Second operand has 11 states, 11 states have (on average 41.09090909090909) internal successors, (452), 11 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:11,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:11,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 78 [2024-11-17 03:32:11,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:12,315 INFO L124 PetriNetUnfolderBase]: 775/1564 cut-off events. [2024-11-17 03:32:12,315 INFO L125 PetriNetUnfolderBase]: For 644/695 co-relation queries the response was YES. [2024-11-17 03:32:12,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 1564 events. 775/1564 cut-off events. For 644/695 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9413 event pairs, 303 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 3040. Up to 604 conditions per place. [2024-11-17 03:32:12,325 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 63 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-11-17 03:32:12,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 474 flow [2024-11-17 03:32:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2024-11-17 03:32:12,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6004273504273504 [2024-11-17 03:32:12,328 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 288 flow. Second operand 6 states and 281 transitions. [2024-11-17 03:32:12,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 474 flow [2024-11-17 03:32:12,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 460 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:32:12,330 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 303 flow [2024-11-17 03:32:12,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-11-17 03:32:12,332 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2024-11-17 03:32:12,332 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 303 flow [2024-11-17 03:32:12,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.09090909090909) internal successors, (452), 11 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:12,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:12,333 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:12,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:32:12,533 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,SelfDestructingSolverStorable11 [2024-11-17 03:32:12,533 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:12,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:12,534 INFO L85 PathProgramCache]: Analyzing trace with hash -817151421, now seen corresponding path program 1 times [2024-11-17 03:32:12,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:12,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435762056] [2024-11-17 03:32:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:12,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-17 03:32:12,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:12,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435762056] [2024-11-17 03:32:12,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435762056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:12,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:12,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:32:12,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686709859] [2024-11-17 03:32:12,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:12,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:32:12,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:12,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:32:12,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:32:12,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-17 03:32:12,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:12,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:12,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-17 03:32:12,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:12,858 INFO L124 PetriNetUnfolderBase]: 525/1107 cut-off events. [2024-11-17 03:32:12,859 INFO L125 PetriNetUnfolderBase]: For 497/546 co-relation queries the response was YES. [2024-11-17 03:32:12,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2429 conditions, 1107 events. 525/1107 cut-off events. For 497/546 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6450 event pairs, 406 based on Foata normal form. 24/915 useless extension candidates. Maximal degree in co-relation 2265. Up to 773 conditions per place. [2024-11-17 03:32:12,866 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 49 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-17 03:32:12,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 401 flow [2024-11-17 03:32:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:32:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:32:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2024-11-17 03:32:12,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-11-17 03:32:12,868 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 303 flow. Second operand 4 states and 175 transitions. [2024-11-17 03:32:12,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 401 flow [2024-11-17 03:32:12,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 393 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:12,871 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 295 flow [2024-11-17 03:32:12,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-11-17 03:32:12,872 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-17 03:32:12,872 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 295 flow [2024-11-17 03:32:12,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:12,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:12,873 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:12,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:32:12,873 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:12,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash -817151420, now seen corresponding path program 1 times [2024-11-17 03:32:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067465080] [2024-11-17 03:32:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-17 03:32:13,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:13,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067465080] [2024-11-17 03:32:13,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067465080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:13,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988993372] [2024-11-17 03:32:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:13,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:13,198 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) [2024-11-17 03:32:13,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:32:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:13,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:32:13,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:13,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:13,593 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 [2024-11-17 03:32:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:13,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988993372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:13,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:13,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-17 03:32:13,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510918088] [2024-11-17 03:32:13,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:13,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:32:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:13,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:32:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:32:14,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 78 [2024-11-17 03:32:14,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 295 flow. Second operand has 21 states, 21 states have (on average 42.38095238095238) internal successors, (890), 21 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:14,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:14,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 78 [2024-11-17 03:32:14,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:14,876 INFO L124 PetriNetUnfolderBase]: 888/1941 cut-off events. [2024-11-17 03:32:14,877 INFO L125 PetriNetUnfolderBase]: For 605/676 co-relation queries the response was YES. [2024-11-17 03:32:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 1941 events. 888/1941 cut-off events. For 605/676 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12790 event pairs, 291 based on Foata normal form. 92/1734 useless extension candidates. Maximal degree in co-relation 3986. Up to 650 conditions per place. [2024-11-17 03:32:14,889 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 74 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2024-11-17 03:32:14,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 629 flow [2024-11-17 03:32:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:32:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:32:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 486 transitions. [2024-11-17 03:32:14,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-11-17 03:32:14,892 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 295 flow. Second operand 10 states and 486 transitions. [2024-11-17 03:32:14,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 629 flow [2024-11-17 03:32:14,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 626 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:32:14,897 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 350 flow [2024-11-17 03:32:14,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=350, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2024-11-17 03:32:14,897 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2024-11-17 03:32:14,898 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 350 flow [2024-11-17 03:32:14,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 42.38095238095238) internal successors, (890), 21 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:14,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:14,898 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:14,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:32:15,102 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 [2024-11-17 03:32:15,103 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:15,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1484414902, now seen corresponding path program 1 times [2024-11-17 03:32:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:15,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446306598] [2024-11-17 03:32:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:15,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:15,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446306598] [2024-11-17 03:32:15,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446306598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:15,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27378349] [2024-11-17 03:32:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:15,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:15,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:15,574 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) [2024-11-17 03:32:15,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:32:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:15,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-17 03:32:15,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:15,714 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 [2024-11-17 03:32:15,717 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 [2024-11-17 03:32:15,803 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:15,804 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 [2024-11-17 03:32:15,824 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:15,824 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 [2024-11-17 03:32:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:16,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:16,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27378349] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:16,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:16,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 25 [2024-11-17 03:32:16,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85277483] [2024-11-17 03:32:16,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:16,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:32:16,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:32:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-17 03:32:17,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 78 [2024-11-17 03:32:17,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 350 flow. Second operand has 10 states, 10 states have (on average 41.5) internal successors, (415), 10 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:17,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:17,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 78 [2024-11-17 03:32:17,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:17,488 INFO L124 PetriNetUnfolderBase]: 1617/3266 cut-off events. [2024-11-17 03:32:17,489 INFO L125 PetriNetUnfolderBase]: For 2820/2996 co-relation queries the response was YES. [2024-11-17 03:32:17,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7748 conditions, 3266 events. 1617/3266 cut-off events. For 2820/2996 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23663 event pairs, 739 based on Foata normal form. 0/2830 useless extension candidates. Maximal degree in co-relation 7569. Up to 1350 conditions per place. [2024-11-17 03:32:17,515 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 65 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2024-11-17 03:32:17,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 95 transitions, 559 flow [2024-11-17 03:32:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:32:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:32:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 279 transitions. [2024-11-17 03:32:17,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-11-17 03:32:17,517 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 350 flow. Second operand 6 states and 279 transitions. [2024-11-17 03:32:17,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 95 transitions, 559 flow [2024-11-17 03:32:17,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 95 transitions, 528 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:32:17,521 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 344 flow [2024-11-17 03:32:17,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2024-11-17 03:32:17,523 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2024-11-17 03:32:17,523 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 344 flow [2024-11-17 03:32:17,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 41.5) internal successors, (415), 10 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:17,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:17,524 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:17,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 03:32:17,728 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 [2024-11-17 03:32:17,729 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:17,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:17,729 INFO L85 PathProgramCache]: Analyzing trace with hash -382020735, now seen corresponding path program 1 times [2024-11-17 03:32:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:17,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452583862] [2024-11-17 03:32:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:17,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:18,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:18,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452583862] [2024-11-17 03:32:18,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452583862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:18,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556409722] [2024-11-17 03:32:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:18,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:18,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:18,419 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) [2024-11-17 03:32:18,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:32:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:18,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-17 03:32:18,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:18,581 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 [2024-11-17 03:32:18,588 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 [2024-11-17 03:32:18,700 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 03:32:18,701 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 [2024-11-17 03:32:18,705 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 [2024-11-17 03:32:18,809 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:18,810 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 [2024-11-17 03:32:18,819 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 [2024-11-17 03:32:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:19,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:20,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556409722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:20,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:20,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2024-11-17 03:32:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805982264] [2024-11-17 03:32:20,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:20,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-17 03:32:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-17 03:32:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2024-11-17 03:32:21,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2024-11-17 03:32:21,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 344 flow. Second operand has 34 states, 34 states have (on average 32.05882352941177) internal successors, (1090), 34 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:21,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:21,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2024-11-17 03:32:21,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:23,686 INFO L124 PetriNetUnfolderBase]: 4898/9891 cut-off events. [2024-11-17 03:32:23,687 INFO L125 PetriNetUnfolderBase]: For 9469/10102 co-relation queries the response was YES. [2024-11-17 03:32:23,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23950 conditions, 9891 events. 4898/9891 cut-off events. For 9469/10102 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 85811 event pairs, 1016 based on Foata normal form. 366/9512 useless extension candidates. Maximal degree in co-relation 23782. Up to 1635 conditions per place. [2024-11-17 03:32:23,982 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 130 selfloop transitions, 22 changer transitions 0/175 dead transitions. [2024-11-17 03:32:23,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 175 transitions, 1046 flow [2024-11-17 03:32:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:32:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:32:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 644 transitions. [2024-11-17 03:32:23,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4856711915535445 [2024-11-17 03:32:23,985 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 344 flow. Second operand 17 states and 644 transitions. [2024-11-17 03:32:23,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 175 transitions, 1046 flow [2024-11-17 03:32:23,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1030 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:23,996 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 409 flow [2024-11-17 03:32:23,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=409, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2024-11-17 03:32:23,996 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 28 predicate places. [2024-11-17 03:32:23,997 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 409 flow [2024-11-17 03:32:23,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 32.05882352941177) internal successors, (1090), 34 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:23,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:23,998 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:24,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:32:24,201 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 [2024-11-17 03:32:24,202 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:24,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1227779057, now seen corresponding path program 1 times [2024-11-17 03:32:24,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:24,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495837835] [2024-11-17 03:32:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:24,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:24,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495837835] [2024-11-17 03:32:24,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495837835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:24,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317871764] [2024-11-17 03:32:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:24,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:24,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:24,562 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) [2024-11-17 03:32:24,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:32:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:24,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:32:24,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:24,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:24,953 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 [2024-11-17 03:32:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:25,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317871764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:25,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:25,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-17 03:32:25,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208914913] [2024-11-17 03:32:25,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:25,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-17 03:32:25,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-17 03:32:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-17 03:32:25,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 78 [2024-11-17 03:32:25,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 409 flow. Second operand has 25 states, 25 states have (on average 42.48) internal successors, (1062), 25 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:25,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:25,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 78 [2024-11-17 03:32:25,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:26,901 INFO L124 PetriNetUnfolderBase]: 3967/9296 cut-off events. [2024-11-17 03:32:26,901 INFO L125 PetriNetUnfolderBase]: For 10884/11244 co-relation queries the response was YES. [2024-11-17 03:32:26,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23308 conditions, 9296 events. 3967/9296 cut-off events. For 10884/11244 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 87621 event pairs, 1687 based on Foata normal form. 408/8730 useless extension candidates. Maximal degree in co-relation 23123. Up to 3162 conditions per place. [2024-11-17 03:32:26,957 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 82 selfloop transitions, 19 changer transitions 0/128 dead transitions. [2024-11-17 03:32:26,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 128 transitions, 857 flow [2024-11-17 03:32:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:32:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:32:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 482 transitions. [2024-11-17 03:32:26,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.617948717948718 [2024-11-17 03:32:26,959 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 409 flow. Second operand 10 states and 482 transitions. [2024-11-17 03:32:26,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 128 transitions, 857 flow [2024-11-17 03:32:26,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 128 transitions, 802 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-17 03:32:26,976 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 428 flow [2024-11-17 03:32:26,976 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=428, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2024-11-17 03:32:26,976 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 31 predicate places. [2024-11-17 03:32:26,976 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 428 flow [2024-11-17 03:32:26,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 42.48) internal successors, (1062), 25 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:26,977 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:26,977 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:26,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:32:27,181 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 [2024-11-17 03:32:27,182 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:27,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1042259842, now seen corresponding path program 1 times [2024-11-17 03:32:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:27,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439682963] [2024-11-17 03:32:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:27,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:27,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439682963] [2024-11-17 03:32:27,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439682963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:27,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689764345] [2024-11-17 03:32:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:27,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:27,691 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) [2024-11-17 03:32:27,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:32:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:27,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-17 03:32:27,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:27,846 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 [2024-11-17 03:32:27,848 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 [2024-11-17 03:32:27,928 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:27,928 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 [2024-11-17 03:32:27,939 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:27,939 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 [2024-11-17 03:32:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:28,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:28,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689764345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:28,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-11-17 03:32:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885142189] [2024-11-17 03:32:28,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:28,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-17 03:32:28,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-17 03:32:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2024-11-17 03:32:29,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-17 03:32:29,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 428 flow. Second operand has 29 states, 29 states have (on average 36.10344827586207) internal successors, (1047), 29 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:29,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:29,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-17 03:32:29,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:31,431 INFO L124 PetriNetUnfolderBase]: 3899/8119 cut-off events. [2024-11-17 03:32:31,431 INFO L125 PetriNetUnfolderBase]: For 12671/13013 co-relation queries the response was YES. [2024-11-17 03:32:31,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22138 conditions, 8119 events. 3899/8119 cut-off events. For 12671/13013 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 69932 event pairs, 969 based on Foata normal form. 342/7556 useless extension candidates. Maximal degree in co-relation 21951. Up to 1765 conditions per place. [2024-11-17 03:32:31,610 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 127 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2024-11-17 03:32:31,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 175 transitions, 1156 flow [2024-11-17 03:32:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:32:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:32:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 703 transitions. [2024-11-17 03:32:31,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5301659125188537 [2024-11-17 03:32:31,616 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 428 flow. Second operand 17 states and 703 transitions. [2024-11-17 03:32:31,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 175 transitions, 1156 flow [2024-11-17 03:32:31,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 175 transitions, 1125 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:32:31,642 INFO L231 Difference]: Finished difference. Result has 116 places, 86 transitions, 459 flow [2024-11-17 03:32:31,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=459, PETRI_PLACES=116, PETRI_TRANSITIONS=86} [2024-11-17 03:32:31,643 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 44 predicate places. [2024-11-17 03:32:31,643 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 86 transitions, 459 flow [2024-11-17 03:32:31,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 36.10344827586207) internal successors, (1047), 29 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:31,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:31,644 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:31,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-17 03:32:31,844 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 [2024-11-17 03:32:31,845 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:31,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 117508771, now seen corresponding path program 1 times [2024-11-17 03:32:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:31,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343278317] [2024-11-17 03:32:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:32,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:32,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343278317] [2024-11-17 03:32:32,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343278317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:32,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500789723] [2024-11-17 03:32:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:32,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:32,534 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) [2024-11-17 03:32:32,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:32:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:32,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-17 03:32:32,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:32,693 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 [2024-11-17 03:32:32,769 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-17 03:32:32,770 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 [2024-11-17 03:32:32,901 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-17 03:32:32,902 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 [2024-11-17 03:32:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:33,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:33,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500789723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:33,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:33,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2024-11-17 03:32:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798353140] [2024-11-17 03:32:33,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:33,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-17 03:32:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-17 03:32:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2024-11-17 03:32:35,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2024-11-17 03:32:35,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 86 transitions, 459 flow. Second operand has 33 states, 33 states have (on average 32.303030303030305) internal successors, (1066), 33 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:35,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:35,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2024-11-17 03:32:35,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:38,430 INFO L124 PetriNetUnfolderBase]: 11316/22766 cut-off events. [2024-11-17 03:32:38,430 INFO L125 PetriNetUnfolderBase]: For 38966/39863 co-relation queries the response was YES. [2024-11-17 03:32:38,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63965 conditions, 22766 events. 11316/22766 cut-off events. For 38966/39863 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 217334 event pairs, 2228 based on Foata normal form. 873/21734 useless extension candidates. Maximal degree in co-relation 63759. Up to 3815 conditions per place. [2024-11-17 03:32:38,581 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 140 selfloop transitions, 27 changer transitions 0/190 dead transitions. [2024-11-17 03:32:38,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 1376 flow [2024-11-17 03:32:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-17 03:32:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-17 03:32:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 735 transitions. [2024-11-17 03:32:38,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-11-17 03:32:38,584 INFO L175 Difference]: Start difference. First operand has 116 places, 86 transitions, 459 flow. Second operand 20 states and 735 transitions. [2024-11-17 03:32:38,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 1376 flow [2024-11-17 03:32:38,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 190 transitions, 1327 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:32:38,622 INFO L231 Difference]: Finished difference. Result has 133 places, 90 transitions, 545 flow [2024-11-17 03:32:38,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=545, PETRI_PLACES=133, PETRI_TRANSITIONS=90} [2024-11-17 03:32:38,622 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 61 predicate places. [2024-11-17 03:32:38,622 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 90 transitions, 545 flow [2024-11-17 03:32:38,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 32.303030303030305) internal successors, (1066), 33 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:38,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:38,623 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:38,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 03:32:38,823 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 [2024-11-17 03:32:38,823 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:38,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash 825234530, now seen corresponding path program 1 times [2024-11-17 03:32:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:38,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135904353] [2024-11-17 03:32:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:39,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:39,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135904353] [2024-11-17 03:32:39,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135904353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:39,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524120106] [2024-11-17 03:32:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:39,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:39,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:39,215 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) [2024-11-17 03:32:39,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:32:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:39,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-17 03:32:39,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:39,396 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 [2024-11-17 03:32:39,404 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 [2024-11-17 03:32:39,499 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:39,499 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 [2024-11-17 03:32:39,506 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 [2024-11-17 03:32:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:40,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:40,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524120106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:40,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:40,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-17 03:32:40,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912537435] [2024-11-17 03:32:40,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:40,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-17 03:32:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-17 03:32:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-17 03:32:41,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-17 03:32:41,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 90 transitions, 545 flow. Second operand has 28 states, 28 states have (on average 35.67857142857143) internal successors, (999), 28 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:41,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:41,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-17 03:32:41,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:45,358 INFO L124 PetriNetUnfolderBase]: 12070/25095 cut-off events. [2024-11-17 03:32:45,358 INFO L125 PetriNetUnfolderBase]: For 56614/57974 co-relation queries the response was YES. [2024-11-17 03:32:45,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72272 conditions, 25095 events. 12070/25095 cut-off events. For 56614/57974 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 249533 event pairs, 2829 based on Foata normal form. 966/23746 useless extension candidates. Maximal degree in co-relation 72153. Up to 4618 conditions per place. [2024-11-17 03:32:45,728 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 130 selfloop transitions, 23 changer transitions 0/179 dead transitions. [2024-11-17 03:32:45,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 179 transitions, 1423 flow [2024-11-17 03:32:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-17 03:32:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-17 03:32:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 674 transitions. [2024-11-17 03:32:45,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5082956259426847 [2024-11-17 03:32:45,730 INFO L175 Difference]: Start difference. First operand has 133 places, 90 transitions, 545 flow. Second operand 17 states and 674 transitions. [2024-11-17 03:32:45,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 179 transitions, 1423 flow [2024-11-17 03:32:45,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 1336 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-11-17 03:32:45,839 INFO L231 Difference]: Finished difference. Result has 139 places, 92 transitions, 575 flow [2024-11-17 03:32:45,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=575, PETRI_PLACES=139, PETRI_TRANSITIONS=92} [2024-11-17 03:32:45,840 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 67 predicate places. [2024-11-17 03:32:45,840 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 92 transitions, 575 flow [2024-11-17 03:32:45,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 35.67857142857143) internal successors, (999), 28 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:45,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:45,841 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:45,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-17 03:32:46,045 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 [2024-11-17 03:32:46,046 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:46,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2095455468, now seen corresponding path program 1 times [2024-11-17 03:32:46,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:46,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218589016] [2024-11-17 03:32:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:46,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:46,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:46,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218589016] [2024-11-17 03:32:46,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218589016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:46,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014011773] [2024-11-17 03:32:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:46,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:46,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:46,546 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) [2024-11-17 03:32:46,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:32:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:46,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:32:46,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:46,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:47,136 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 [2024-11-17 03:32:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:47,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014011773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:47,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:47,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-17 03:32:47,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29133748] [2024-11-17 03:32:47,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:47,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-17 03:32:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:47,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-17 03:32:47,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-17 03:32:48,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 78 [2024-11-17 03:32:48,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 92 transitions, 575 flow. Second operand has 32 states, 32 states have (on average 41.96875) internal successors, (1343), 32 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:48,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:48,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 78 [2024-11-17 03:32:48,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:51,948 INFO L124 PetriNetUnfolderBase]: 10619/23693 cut-off events. [2024-11-17 03:32:51,948 INFO L125 PetriNetUnfolderBase]: For 56607/57807 co-relation queries the response was YES. [2024-11-17 03:32:52,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70944 conditions, 23693 events. 10619/23693 cut-off events. For 56607/57807 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 247050 event pairs, 2584 based on Foata normal form. 957/21969 useless extension candidates. Maximal degree in co-relation 70821. Up to 4405 conditions per place. [2024-11-17 03:32:52,173 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 156 selfloop transitions, 23 changer transitions 0/208 dead transitions. [2024-11-17 03:32:52,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 208 transitions, 1650 flow [2024-11-17 03:32:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:32:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:32:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 652 transitions. [2024-11-17 03:32:52,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6429980276134122 [2024-11-17 03:32:52,175 INFO L175 Difference]: Start difference. First operand has 139 places, 92 transitions, 575 flow. Second operand 13 states and 652 transitions. [2024-11-17 03:32:52,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 208 transitions, 1650 flow [2024-11-17 03:32:52,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 208 transitions, 1556 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-17 03:32:52,286 INFO L231 Difference]: Finished difference. Result has 140 places, 94 transitions, 609 flow [2024-11-17 03:32:52,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=609, PETRI_PLACES=140, PETRI_TRANSITIONS=94} [2024-11-17 03:32:52,287 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 68 predicate places. [2024-11-17 03:32:52,287 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 94 transitions, 609 flow [2024-11-17 03:32:52,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 41.96875) internal successors, (1343), 32 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:52,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:52,288 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:52,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-17 03:32:52,488 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 [2024-11-17 03:32:52,488 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:32:52,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash 8705473, now seen corresponding path program 1 times [2024-11-17 03:32:52,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:52,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515778655] [2024-11-17 03:32:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:52,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515778655] [2024-11-17 03:32:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515778655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368233213] [2024-11-17 03:32:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:53,274 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) [2024-11-17 03:32:53,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 03:32:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:53,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:32:53,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:53,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:53,851 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 [2024-11-17 03:32:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:32:53,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368233213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:53,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:53,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-17 03:32:53,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843070110] [2024-11-17 03:32:53,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:53,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-17 03:32:53,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:53,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-17 03:32:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2024-11-17 03:32:54,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 78 [2024-11-17 03:32:54,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 94 transitions, 609 flow. Second operand has 33 states, 33 states have (on average 42.121212121212125) internal successors, (1390), 33 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:54,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:54,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 78 [2024-11-17 03:32:54,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:59,823 INFO L124 PetriNetUnfolderBase]: 12849/30094 cut-off events. [2024-11-17 03:32:59,823 INFO L125 PetriNetUnfolderBase]: For 81846/83319 co-relation queries the response was YES. [2024-11-17 03:32:59,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92306 conditions, 30094 events. 12849/30094 cut-off events. For 81846/83319 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 325184 event pairs, 3238 based on Foata normal form. 1143/28240 useless extension candidates. Maximal degree in co-relation 92180. Up to 5988 conditions per place. [2024-11-17 03:33:00,115 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 158 selfloop transitions, 23 changer transitions 0/210 dead transitions. [2024-11-17 03:33:00,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 210 transitions, 1803 flow [2024-11-17 03:33:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:33:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:33:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 642 transitions. [2024-11-17 03:33:00,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6331360946745562 [2024-11-17 03:33:00,118 INFO L175 Difference]: Start difference. First operand has 140 places, 94 transitions, 609 flow. Second operand 13 states and 642 transitions. [2024-11-17 03:33:00,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 210 transitions, 1803 flow [2024-11-17 03:33:00,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 210 transitions, 1734 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-17 03:33:00,310 INFO L231 Difference]: Finished difference. Result has 146 places, 96 transitions, 648 flow [2024-11-17 03:33:00,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=648, PETRI_PLACES=146, PETRI_TRANSITIONS=96} [2024-11-17 03:33:00,311 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 74 predicate places. [2024-11-17 03:33:00,311 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 96 transitions, 648 flow [2024-11-17 03:33:00,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 42.121212121212125) internal successors, (1390), 33 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:00,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:00,312 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:00,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:00,516 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 [2024-11-17 03:33:00,517 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-17 03:33:00,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1133387959, now seen corresponding path program 2 times [2024-11-17 03:33:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:00,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746434405] [2024-11-17 03:33:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746434405] [2024-11-17 03:33:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746434405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43055015] [2024-11-17 03:33:01,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:01,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:01,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:01,449 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) [2024-11-17 03:33:01,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 03:33:01,616 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:01,616 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:01,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-17 03:33:01,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:01,626 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 [2024-11-17 03:33:01,629 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 [2024-11-17 03:33:01,742 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:33:01,743 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 [2024-11-17 03:33:01,759 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-17 03:33:01,759 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 [2024-11-17 03:33:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:02,068 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:33:02,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2024-11-17 03:33:02,077 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:33:02,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2024-11-17 03:33:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:02,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-17 03:33:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43055015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:03,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:03,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2024-11-17 03:33:03,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760773347] [2024-11-17 03:33:03,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:03,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-17 03:33:03,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-17 03:33:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2024-11-17 03:33:05,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2024-11-17 03:33:05,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 96 transitions, 648 flow. Second operand has 42 states, 42 states have (on average 32.095238095238095) internal successors, (1348), 42 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:05,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:05,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2024-11-17 03:33:05,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand